Petroleum hydrocarbon concentration in sediments along northern west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Ram, A.; Kadam, A.N.

Gas chromatography revealed that nonpolar material extracted from surface sediments collected along the northern west coast of India was originated from petroleum hydrocarbon residue. Petroleum hydrocarbon levels as determinEd. by fluorescence...

Tides in the Mandovi and Zuari estuaries, Goa, west coast of India

Indian Academy of Sciences (India)

Indian Ocean, including the Arabian Sea. As a result, the windward side of the Ghats receives high precipitation due to the topographic effect. The rainfall along the central west coast of India is about 250 cm during June–September. The Mandovi and the Zuari are two estuaries that are located along the west coast, in Goa.

Suspended sediment fluxes in a tropical estuary, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

AnilKumar, N.; DineshKumar, P.K.; Srinivas, K.

Annual transport processes of suspended sediments in Beypore estuary - a tropical estuary along the south west coast of India - were investigated based on time series measurements within the system. It's observed that the sediment transport...

Qualitative assessment of tectonic lineaments over the coastal and innershelf of Kakinada and Kalingapatnam, central east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Subrahmanyam, A.S.; Murty, G.P.S.; Sarma, K.V.L.N.S.; Rao, K.M.; Reddy, N.P.C.; Rao, M.M.M.; Subrahmanyam, V.; Rani, P.S.; Anuradha, A.; Murthy, K.S.R.

-1 JOURNAL GEOLOGICAL SOCIETY OF INDIA Vol.69, June 2007, pp.1328-1334 Qualitative Assessment of Tectonic Lineaments Over the Coastal and Innershelf of Kakinada and Kalingapatnam, Central East Coast of India A.S.SUBRAHMANYAM, G. P. S. MURTY, K.V.L.N.S. SARMA... off 0016-7622/2007-69-6-1328/$ 1.00 ? GEOL. SOC. INDIA QUALITATIVE ASSESSMENT OF TECTONIC LINEAMENTS OVER COASTAL REGIONS, VISAKHAPATNAM, A.P. 1329 Fig.l. Earthquake distribution map of East Coast of India. Vizianagaram (18 Dec.1995...

Spectra of currents and temperature off Godavari (east coast of India)

Digital Repository Service at National Institute of Oceanography (India)

Sarma, M.S.S; Rao, L.V.G.

Time series data of currents and temperature obtained from a mooring of current meters off Godavari (East Coast of India) during September 1980 are analysed to study the space scales of semidiurnal and internal oscillations in the range of buoyancy...

Planktonic diatoms of the Zuari estuary, Goa (west coast of India)

Digital Repository Service at National Institute of Oceanography (India)

Redekar, P.D.; Wagh, A.B.

composition in the coastal waters between Jaigarh and Rajapur along west coast of India. Mahasagar, 13(4) : 343-352. Qasim, S. Z. and R. Sengupta 1981. Environ- mental characteristics of the Mandovi- Zuari estuarine system in Goa. Estuarine Coastal Shelf...

Recurrence of a marine brachyuran crab, Parapanope euagora (Crustacea: Decapoda: Brachyura: Galenidae from East Coast of India

Directory of Open Access Journals (Sweden)

C. Viswanathan

2013-06-01

Full Text Available Study on the occurrence and distribution of unusual crab species is a matter of fascination for carcinalogists. The present study reports the recurrence of a marine brachyuran crab species Parapanope euagora, of the family Galenidae, after a long period along the East coast of India. During a routine survey, three female ovigerous specimens are caught from Parangipettai coastal waters, southeast coast of India. From the results, after more than ten decades, the species, Parapanope euagora has reappeared in Indian coast revealing its possible, continued existence in Indian waters.

Comparison of tropical nematode communities from three harbours, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Nanajkar, M.; Ingole, B.S.

The three major harbours from the central west coast of India were investigated for their benthic environmental status using nematodes as surrogate community. As these three harbours have shown deteriorated conditions revealed from macrobenthic...

A note on poleward undercurrent along the southwest coast of India

Digital Repository Service at National Institute of Oceanography (India)

Muraleedharan, P.M.; RameshKumar, M.R.; Rao, L.V.G.

A comparative study of currents and hydrography during th monsoon and non-monsoon periods of 1984, 1985 and 1987 was carried out using data collected on five cruises covering the waters of the west coast of India from 8 degrees N to 15 degrees N...

Recent foraminifera along west coast of India: Restrospect, perspect and prospect

Digital Repository Service at National Institute of Oceanography (India)

Nigam, R.; Khare, N.

helf to check repetition of the work and to guide workers to decide the thrust areas and take up multi directional approaches to such studies. In view of this a review of the foraminiferal studies carried out exclusively off the west coast of India...

Baseline of organotin pollution in fishes, clams, shrimps, squids and crabs collected from the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Jadhav, S.; Bhosale, D.; Bhosle, N.B.

is available. The present study was planned to assess organotin contamination levels in edible marine organisms collected from the fish markets of Goa, Karwar and Mumbai, the west coast of India. The sampling locations: Goa (15.5ºN, 73.9ºE), Karwar (14.8º... of Karwar is around 36,000 tonnes. Mumbai coast is about 140 km long. Mumbai is among busiest harbours on the west coast of India is known for industrial pollution. The fishes, clams, crabs and squids and shrimps were collected from local fish markets...

Coastal upwelling along the southwest coast of India – ENSO modulation

Directory of Open Access Journals (Sweden)

K. Muni Krishna

2008-06-01

Full Text Available An index of El Niño Southern Oscillation (ENSO in the Pacific during pre monsoon season is shown to account for a significant part of the variability of coastal Sea Surface Temperature (SST anomalies measured a few months later within the wind driven southwest coast of India coastal upwelling region 7° N–14° N. This teleconnection is thought to result from an atmospheric bridge between the Pacific and north Indian Oceans, leading to warm (cold ENSO events being associated with relaxation (intensification of the Indian trade winds and of the wind-induced coastal upwelling. This ENSO related modulation of the wind-driven coastal upwelling appears to contribute to the connection observed at the basin-scale between ENSO and SST in the Arabian Sea. The ability to use this teleconnection to give warning of large changes in the southwest coast of India coastal upwelling few months in advance is successfully tested using data from 1998 and 1999 ENSO events.

Longshore sediment transport rate-measurement and estimation, central west coast of India

Digital Repository Service at National Institute of Oceanography (India)

SanilKumar, V.; Anand, N.M.; Chandramohan, P.; Naik, G.N.

rate—measurement and estimation, central west coast of India V. Sanil Kumar * , N.M. Anand, P. Chandramohan, G.N. Naik Ocean Engineering Division, National Institute of Oceanography, Donapaula, Goa 403 004, India Received 26 October 2001; received... engineering designs. The longshore current generated by obliquely incident breaking waves plays an important role in transporting sediment in the surf zone. The longshore current velocity varies across the surf zone, reaching a maximum value close to the wave...

Propagation of tides in the Cochin estuarine system, southwest coast of India

Digital Repository Service at National Institute of Oceanography (India)

Srinivas, K.; Revichandran, C.; Maheswaran, P.A.; Asharaf, T.T.M.; Murukesh, N.

analysis, (Heritage Publishers, New Delhi) 1988, pp. 400. 10 Srinivas K, Seasonal and interannual variability of sea level and associated surface meteorological parameters at Cochin, Ph.D. thesis, Cochin University of Science and Technology, India, 1999.... 11 Joseph K A, Strait dynamics of tropical tidal inlets, Ph.D. thesis, Cochin University of Science and Technology, India, 1996. 12 Unnikrishnan A S, Shetye S R & Gouveia A D, Tidal propa- gation in the Mandovi-Zuari estuarine network, west coast...

Surface wave statistics and spectra for Valiathura coastlines, SW coast of India

Digital Repository Service at National Institute of Oceanography (India)

Asharaf, T.T.M.; Nair, R.P.; Sanjana, M.C.; Muraleedharan, G.; Kurup, P.G.

Sciences Vol. 30, March , 2001, pp 9-17 Surface wave statistics and spectra for Valiathura coastline, SW coast of India T T Mohamed Asharaf National Institute of Oceanography, Regional Centre, Cochin, 682 014, India and Ratish P Nair, M.... 2D), the prominent direction was MOHAMED ASHARAF et al. : WAVE STATISTICS AND SPECTRA 11 Fig. 2Direction surface plots of January-June INDIAN J. MAR. SCI., VOL 30, MARCH 2001 12 Fig. 2  (Contd) ... Direction surface...

Geophysical studies over the continental margins of the east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Rao, T.C.S.; Rao, V.B.

. Continuity of surface and subsurface features from profile to profile is indicated. Two major structural elements - viz. The "Marginal High", situated at the foot of the continental slope and extending along the east coast of India, and the "Marginal Basin...

Does subterranean flow initiate mud banks off the southwest coast of India?

Digital Repository Service at National Institute of Oceanography (India)

Balachandran, K.K.

Coastal waters off the southwest coast of India draw special attention because of the occurrence of mud banks at certain locations during southwest monsoon period. The present study puts forward a hypothesis of a subterranean flow, which could be a...

Thermal responses of marine animals with reference to Kalpakkam Coast (South East Coast of India)

International Nuclear Information System (INIS)

Shahul Hameed, P.; Syed Mohamed, H.E.; Krishnamoorthy, R.

2008-01-01

Kalpakkam has been chosen as model coastal site to study the impact of thermal discharges on water qualities, benthic animals and fishes. The results of this study are expected to be valid for any given open coastal location on the east and west coast of India. The present study investigates, the impact of the elevated temperature due to thermal discharge on two groups of marine animals viz. Benthos (non-swimming bottom dwellers) and fishes

Tidal propagation off the central west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Unnikrishnan, A.S.

. [Keywords: Tidal propagation, Mumbai high, Global tidal model, Shelf model, Central west coast of India] Introduction In coastal regions, tides play an important role in determining circulation and hydrography. Barotropic tides coming from the open... with increase in the width of the shelf. Materials and Methods Global tidal models Schwiderski5 used a hydrodynamic interpolation technique to determine the amplitude and phase of tidal constituents of global ocean. Since the availability of satellite...

Khalkattapatna port: The lost archaeological heritage of Odisha, east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Tripati, S.; ManiMurali, R.; JayaKumar, S.; Pradhan, A.K.; Behera, R.P.; Choudhury, R.

The history of Odisha, lying on the east coast of India, is well documented from the Stone Age onwards. The evidences suggest that the ports of Odisha had contacts with the Arabs, Mediterranean countries and South Asia, as well as Southeast Asian...

Exploration of a Portuguese shipwreck in Goa waters, western coast of India

Digital Repository Service at National Institute of Oceanography (India)

Tripati, S.; Gaur, A.S.; Sundaresh

brown glaze and linear designs. From the shape and size of the rims it appears that these jars were made for different purposes, or manufactured by different makers. On the basis of the findings, the pottery bases, rims and body sherds can... in India, a number of changes were noticed in the design and construction of ships along the western coast of India, e.g. the introduction of nails in joints and increased use of caulking (Deloche, 1996). Likewise, the Portuguese borrowed wood joinery...

Antimicrobial activity of marine organisms collected off the coast of South East India

Digital Repository Service at National Institute of Oceanography (India)

Rodrigues, E.; Tilvi, S.; Naik, C.G.

In vitro antimicrobial screening of nine marine sponges (Porifera) and two seaweeds, collected from south east coast of India, against selected clinical isolates of bacteria and fungi was conducted in this study. Methanolic extracts of all...

Ecology of a heterotrichous ciliate Fabrea salina from salterns of Bombay Coast, India

Digital Repository Service at National Institute of Oceanography (India)

Rattan, P.; Ansari, Z.A.; Sreepada, R.A.

The abundance and population size structure of a heterotrichous ciliate @iFabrea salina@@, was studied in relation to hydrochemical and hydrobiological variables in three hypersaline ponds of Bombay, west coast of India There was a clear seasonal...

Radiocarbon dates of the medieval period stone anchors from Dabhol, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A.S.; Sundaresh; Tripati, S.; Vora, K.H.

(Table 1) belong to Indo-Arab type and are similar to those reported from Dwarka, Bet Dwarka, Miyani, Visawada and Mithivirdi on the Saurash- tra coast 8 , and also on the Tamil Nadu coast 9 . Anchor 1 is with lower portion broad and tapers upper... the history of the place as a port/harbour. The anchors are similar to those reported from other places on the coast of India and the other Indian Ocean countries, including Dwarka 10 , Bet Dwarka 11 , Miyani and Visawada 12 , Somnath 13 and Mithivirdi...

Assessment of coastal wetland resources of central west coast, India, using LANDSAT data

Digital Repository Service at National Institute of Oceanography (India)

Jagtap, T.G.; Naik, S.; Nagle, V.L.

The part of central west coast (Maharashtra and Goa) of India has been classified and quantified for coastal wetlands using LANDSAT data of 1985-86. The classification accuracy of the maps and area estimates achieved was 84% at 90% confidence level...

Distribution of phosphorus in the marine sediments off the east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Murty, P.S.N.; Reddy, C.V.G.

Sediment samples collected from the shelf and slope regions off the East Coast of India between "Swatch of no ground" in the north and Karaikal in the south, have been analysed for their total phosphorus content and its distribution studied...

Graphic pattern of foraminiferal dominance in nearshore region of central west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Setty, M.G.A.P.; Nigam, R.; Ambre, N.V.

Within the inner neritic zone (0-55 m depth) along the central west coast of India, some foraminiferal groups such as @iAmmonia, Elphidium, Trochammina, Bulimina, Bolivina, Nonion, Nonionella@@ and Florilus@@ individually (total foraminiferal number...

Field measurement on longshore current variation between Ratnagiri and Mangalore, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Chandramohan, P.; Nayak, B.U.; Anand, N.M.; SanilKumar, V.

The daily measurements on longshore current velocity and direction were carried out at selected 12 stations along the coast between Ratnagiri and Mangalore, India. The directional wave data measured at Karwar were used to theoretically estimate...

Community structure and coral health status across the depth gradients of Grande Island, Central west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Manikandan, B.; Ravindran, J.; Mohan, H.; Periasamy, R.; ManiMurali, R.; Ingole, B.S.

The Grande Island, located at the central west coast of India is one of the less studied coral reef systems in India. In this study, we provide a comprehensive description of the coral community structure and health status of corals across...

Sediment fluxes and the littoral drift along northeast Andhra Pradesh Coast, India: estimation by remote sensing.

Science.gov (United States)

Kunte, Pravin D; Alagarsamy, R; Hursthouse, A S

2013-06-01

The littoral drift regime along the northeastern coast of India was investigated by analyzing coastal drift indicators and shoreline changes based on multitemporal satellite images. The study of offshore turbidity patterns and quantitative estimation of suspended sediments was undertaken to understand the magnitude and direction of movement of sediment fluxes. The study revealed that: (1) the character of coastal landforms and sedimentation processes indicate that the sediment transport is bidirectional and monsoon dependent; (2) multidate, multitemporal analysis of satellite images helps to show the nature of sediment transport along the coast. The dominant net sediment transport is in a NE direction along the eastern coast of India. Finally, this assessment demonstrates the potential of remote sensing technology in understanding the coastal morphometric changes, long-term sediment transport, shoreline changes, and offshore turbidity distribution pattern and the implications for the transport of sediment-associated pollutants.

Butyltins in water, biofilm, animals and sediments of the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Bhosle, N.B.; Garg, A.; Jadhav, S.; Harjee, R; Sawant, S.S.; Venkat, K.; Anil, A.C.

boats, barges, and the inputs of TBT from the Goa shipyard and dry dock facility situated in the harbour are the probable sources of the DBT and TBT in the samples of the west coast of India. Higher levels of TBT were observed in biofilm relative...

Impact of sea breeze of the sea off Goa, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Neetu, S.; Shetye, S.R.; Chandramohan, P.

After withdrawal of the Indian Summer Monsoon and until onset of the next monsoon, i.e. roughly during November-May, winds in the coastal region of India are dominated by sea breeze. Impact of daily cycle of the breeze on the sea near the coast can...

Tides in the Mandovi and Zuari estuaries, Goa, west coast of India

Indian Academy of Sciences (India)

Mandovi and Zuari are two estuaries located in Goa,west coast of India.Variation of water level in the estuaries was monitored for a month at 13 locations using tide-poles during March –April 2003.Analysis of this data has provided for the first time,characteristics of how tidal constituents vary in the narrow and shallow ...

Water masses and general hydrography along the west coast of India during early March

Digital Repository Service at National Institute of Oceanography (India)

RameshBabu, V.; Varkey, M.J.; Das, V.K.; Gouveia, A.D.

Structure of water masses along the west coast of India from Bombay to Trivandrum has been studied through vertical sections of temperature, salinity and density during 3-17 March 1977. The Arabian Sea high salinity water spreads south as a core...

Zooplankton standing stock and composition in coastal waters of Goa, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Goswami, S.C.

Temporal and spatial variability in standing stock and zooplankton composition at 5 stations along the Goa Coast, India during 1975-76 were studied. Standing stock values ranged from 22.81 to 53.65 mg C.m/3. Zooplankton community was diverse...

Yeasts from the sediment samples of the EEZ along the southwest coast of India

Digital Repository Service at National Institute of Oceanography (India)

Prabhakaran, N.; Gupta, R.

Fiftyeight yeast isolates were obtained from the benthic sediment samples of 19 stations during R.V. Gaveshani Cruise No. 187 of the Exclusive Economic Zone along the southwest coast of India. The depths ranged from 20 to 1,055 m. Asporogenous yeast...

Influence of eastern Arabian Sea on summer monsoon rainfall over west coast of India

Digital Repository Service at National Institute of Oceanography (India)

RameshBabu, V.; Rao, M.S.; Rao, M.V.

and distant nature. In order to realise the model results and the influence of Arabian sea in the context of long range forecasting of monsoon rainfall, we have examined the correlation between the rainfall over west coast of India and premonsoon thermal...

Manglicolous fungi from Chorao mangroves, Goa, West coast of India: Diversity and frequency of occurrence

Digital Repository Service at National Institute of Oceanography (India)

Sarma, V.V.; Raghukumar, S.

In this paper marine fungi colonizing the decomposing substrata belonging to Rhizophora mucronata and Avicennia marina, at Chorao mangroves, Mandovi river, Goa, West coast of India, are reported. Totally, 45 fungal species from Mandovi mangroves...

Shores of the central west coast of India - a case study using remote sensing data

Digital Repository Service at National Institute of Oceanography (India)

Wagle, B.G.

Geomorphological studies along the Central West Coast of India extending between Bombay to Goa, have been undertaken, using aerial photographs and LANDSAT imagery. Coastal features like active and abandoned cliffs, spits, bars, beach rock, beach...

Dominant role of winds near Sri Lanka in driving seasonal sea level variations along the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Suresh, I.; Vialard, J.; Izumo, T.; Lengaigne, M.; Han, W.; Mc; Muraleedharan, P.M.

version: Geophys. Res. Lett.: 43(13); 2016; 7028-7035 Dominant role of winds near Sri Lanka in driving seasonal sea-level variations along the west coast of India I. Suresh1, J. Vialard2, T. Izumo2,3, M. Lengaigne,2,3, W. Han4, J. McCreary5, P... as manifested both in sea level and surface circulation of the North Indian Ocean (NIO) [e.g., Schott and McCreary, 2001]. The sea level along the west coast of India (WCI), in particular, is dominated by the seasonal cycle. Figure 1a, which shows...

Oceanographic validity of buffer zones for the east coast of India: A hydrometeorological perspective

Digital Repository Service at National Institute of Oceanography (India)

Mascarenhas, A.

, The Gazette of India, Not i- fication, S.O. No. 114(E), 20 February 1991. 37. Fischer, D. W. and Arredondo, M. C., Municipal coastal hazard planning: Los Angeles and Orange County city responses, Cal i- fornia. J. Coast. Res ., 1999, 15 , 974 ? 984...

Benthic foraminifera as proxy for oxygen-depleted conditions off the central west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Nigam, R.; Mazumder, A.; Henriques, P.J.; Saraswat, R.

In order to study the response of benthic foraminifera, especially the rectilinear bi- and tri-serial benthic foraminifera (RBF) to oxygen-depleted conditions from the Arabian Sea off central west coast of India, 103 surface sediment samples...

A two-stage evolution of Visakhapatnam-Paradip Shelf, east coast of India, from magnetic studies

Digital Repository Service at National Institute of Oceanography (India)

Subrahmanyam, A.S.; Murthy, K.S.R.; Rao, T.C.S.; Rao, M.M.M.; Lakshminarayana, S.; Venkateswarlu, K.

A detailed analysis of bathymetry and magnetic data of Visakhapatnam-Paradip shelf, east coast of India revealed three major structural lineaments over the shelf/slope of the area. Models derived from the anomalies associated with the trends...

Temporal variability of macrofauna from a disturbed habitat in Zuari estuary, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Sivadas, S.; Ingole, B.S.; Nanajkar, M.

of macrofaunal community from Mormugao Bay, Zuari estuary, (Goa) on the west coast of India was examined from 2003 to 2004 at seven stations. Environmental variability was assessed through physicochemical parameters of water and sediment. The changes...

Discriminating the biophysical impacts of coastal upwelling and mud banks along the southwest coast of India

Digital Repository Service at National Institute of Oceanography (India)

Karnan, C.; Jyothibabu, R.; Arunpandi, N.; Jagadeesan, L.; Muraleedharan, K.R.; Pratihary, A.K.; Balachandran, K.K.; Naqvi, S.W.A.

Coastal upwelling and mud banks are two oceanographic processes concurrently operating along certain stretches of the southwest (Kerala) coast of India during the Southwest Monsoon period (June-September), facilitating significant enhancement...

Four new species of the genus Rhopalophthalmus (Mysidacea: Crustacea) from the northwest coast of India

Digital Repository Service at National Institute of Oceanography (India)

Panampunnayil, S.U.; Biju, A.

Four new species of the genus Rhopalophthalmus (Mysidacea: Crustacea) from the north west coast of India PANAMPUNNAYIL S.U. AND BIJU. A* National Institute of Oceanography, Regional Centre, Kochi-18, India *Email: biju_nio@yahoo.com Abstract... setae on distal border (Figures 7, 8). Inner lobe of maxillule with five plumose setae and three stout barbed spines, outer lobe with nine strong spines on distal border (Figure 9). Maxilla with large basal lobe and deeply cleft distal lobe; exopod...

Foraminiferal studies in nearshore regions of western coast of India and Laccadives Islands: A review

Digital Repository Service at National Institute of Oceanography (India)

Bhalla, S.N.; Khare, N.; Shanmukha, D.H.; Henriques, P.J.

The literature published on foraminiferal investigations carried out till date on nearshore, shallow water regions up to a depth of 50 m, along western coast of India, including Laccadive Archipelago has been reviewed. The aim is to prepare a...

Hydrography and circulation off the west coast of India during the southwest monsoon 1987

Digital Repository Service at National Institute of Oceanography (India)

Shetye, S.R.; Gouveia, A.D.; Shenoi, S.S.C.; Sundar, D.; Michael, G.S.; Almeida, A.M.; Santanam, K.

Marine Research [48,2 Figure I. Dynamic topography (dyn.cm) ofsea surface in the Arabian Sea relative to 800 db for the period July, August, September 1963. Reproduced from Duing (1970). \\ Goa, India, initiated a program to study the coastal processes off... aJ.: West coast ofIndia during Southwest Monsoon 369 --_.~ i ~"/~-,~ ! f'" l,~ I ~'" -1"' r~ t- f r- l ..gHl I 1.......-~11.... • ( i D~U:.! ~------~3'QGoO Figure 8. (a) Vertical section of temperature (0C) along leg M; (b) Vertical section...

Origin of amphibole-rich beach sands from Tila-Mati, Karwar, central-west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Mislankar, P.G.; Iyer, S.D.

The pocket beach at Tila-Mati, Karwar, central west coast of India, is characterised by the occurrence of amphibole-rich (chiefly tremolite-actinolite) coarse sand in the zone of minimal impact of waves and currents. In the total sediment, grain...

Clay mineral distribution in the continental shelf and slope off Saurashtra, West coast of India

Digital Repository Service at National Institute of Oceanography (India)

Rao, V.P.

Clay mineral distribution in the sediments of the west coast of India indicates that the illite and chlorite-rich sediments, derived from the Indus, occupy the continental shelf of the northern part of the Gulf of Kutch. Montmorillonite derived from...

Seasonal patterns of phytoplankton biomass and productivity in a tropical estuarine complex (west coast of India)

Digital Repository Service at National Institute of Oceanography (India)

Devassy, V.P.; Goes, J.I.

Phytoplankton cell numbers and chlorophyll a determinations were made during the premonsoon, monsoon and postmonsoon periods in the Mandovi-Zuari estuarine complex (west coast of India). Primary productivity estimates agreed well with chlorophyll a...

Maritime trade contacts of Odisha, east coast of India with the Roman world: An appraisal

Digital Repository Service at National Institute of Oceanography (India)

Tripati, S.; Patnaik, S.K.; Pradhan, G.C.

The present state of Odisha (previously known as Kalinga, Utkal,Odra and Orissa) lies on the east coast of India, and is known forits maritime contacts with the Roman world since the early histori-cal period, if not earlier. Initially, the Romans...

Preliminary investigations on transient erosion at Kalpakkam Beach, east coast of India during June 1990

Digital Repository Service at National Institute of Oceanography (India)

Krishnakumar, V.; Vethamony, P.; Swamy, G.N.

Rapid erosion experienced at the southern end of Kalpakkam beach, east coast of India during June, 1990 with relatively calm sea conditions is found to be related to an imbalance caused by the unusual run-off through Palar River due to an unseasonal...

Changes in erosional and depositional processes with time and management of Goa Coast, central west coast of India

Science.gov (United States)

Nayak, Ganapati; D'Souza, Joseph

2010-05-01

Coastal and estuarine environments, world over are facing immense impact due to both natural and anthropogenic processes. The natural processes include climatic changes, rise in sea level, cyclone, flood, tsunamis, coastal erosion, salinity ingress and siltation. Likewise, anthropogenic pressures include population expansion, ocean traffic, dredging, resource exploitation, pollution, unplanned urbanization and intensive industrialization. Due to these impacts the fragile coastal ecosystem and its entities, like sub ecosystems, resources, morphological units are undergoing unprecedented degradation, rendering these coastal regions vulnerable, impinging risk to human population, livestock, properties, as also, devastation of resourceful lands. This accelerates economic fatalities and irreversible obliteration to the ecosystems. Evidences on the global concern towards this issue have been well established. The countries world over, including India, pledged consensus towards the protection of the fragile coastal ecosystems through UNCED, Agenda-21. India, on 19th February 1991, has designated specified corridors along the landward side of the coastline as "Coastal Regulatory Zones" (CRZ), through appropriate policy and law. In context with the CRZ notification, scientific database at local and site-specific areas, developed. Synergy of ecosystems, landscape and resources with demographic, tourism data, vis-à-vis, economic corridors/sectors aided the paradigms and criterion for local and site specific prescriptions for Goa Coast. The Goa coast is a part of central west coast of India and is characterized by pocket beaches flanked by rocky cliffs, estuaries, bays, and at some places mangroves. Beaches in southern Goa are long and linear in nature with sand dunes. The Mandovi and Zuari estuarine system in Goa is the largest in this part of the coast. Mud flats, swampy marshes and wetlands are found mainly along estuaries and creeks. The beaches of Goa are stable beaches

Diel variations in zooplankton and their biochemical composition from Vengurla to Ratnagiri, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Goswami, S.C.; KrishnaKumari, L.; Shrivastava, Y.

Diel variations in zooplankton biomass, common groups and proximate composition zooplankton at stations between Vengurla to Ratnagiri, along west coast of India were studied. Higher biomass values were obtained for the night samples (av = 80 ml/100...

Computation of dilution discharge and mean concentration of effluents in Beypore Estuary, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

DineshKumar, P.K.; Josanto, V.; Sankaranarayanan, V.N.

Tide dominated Beypore estuary along the west coast of India was studied to estimate the mean flow available for diluting the conservative effluents based on the distribution of ambient salinity as a guide through one dimensional analysis...

Use of shallow seismic surveys in the exploration of nearshore placers off Maharashtra coast, India

Digital Repository Service at National Institute of Oceanography (India)

Rajamanickam, G.V.; Ramana, M.V.; Gujar, A.R.

reserves and (3) to understand the nature and structure of the basement which is likely to throw some light upon the important and controversial subject to lake the evolution of the west coast of India. The continuity of the sand reflector below clay has...

Impact of sea breeze on wind-seas off Goa, west coast of India

Indian Academy of Sciences (India)

during November–May, winds in the coastal regions of India are dominated by sea breeze. It has an impact on the daily cycle of the sea state near the coast. The impact is quite significant when large scale winds are weak. During one such event, 1–15 April 1997, a Datawell directional waverider buoy was deployed in 23m ...

Surface circulation over the shelf off the east coast of India during the south west monsoon

Digital Repository Service at National Institute of Oceanography (India)

Gopalakrishna, V.V.; Sastry, J.S.

upwelling in the southern regions off the East Coast of India. Vertical temperature and salinity structures north of Visakhapatnam show a predominant estuarine character and upwelling is not evident. In the northern regions, the flow is directed south...

Impact of bottom trawling on sediment characteristics - A study along inshore waters off Veraval coast, India

Digital Repository Service at National Institute of Oceanography (India)

Bhagirathan, U.; Meenakumari, B.; Jayalakshmy, K.V.; Panda, S.K.; Madhu, V.R.; Vaghela, D.T.

The present communication is a study on the impact of bottom trawling on the sediment characteristics along Veraval coast, which is the largest trawler port of India. Experimental bottom trawling was conducted from MFV Sagarkripa at five transects...

Petroleum hydrocarbon concentration in surface sediments in continental shelf region along the central west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Ram, A.; Kadam, A.N.

Gas chromatography revealed that nonpolar material extracted from surface sediments collected along the northern west coast of India was originated from petroleum hydrocarbon residue. Petroleum hydrocarbon levels as determinEd. by fluorescence...

Occurrence of cyanobacteria (Richelia intracellularis)-diatom (Rhizosolenia hebetata) consortium in the Palk Bay, southeast coast of India

Digital Repository Service at National Institute of Oceanography (India)

Madhu, N.V.; Paul, M.; Ullas, N.; Ashwini, R.; Rehitha, T.V.

Symbiotic association of heterocystous cyanobacterium, Richelia intracellularis Schmidt with oceanic centric diatom, Rhizosolenia hebetata is reported from the Palk Bay, southeast coast of India. One to six trichomes of R. intracellularis were...

Wave transformation and attenuation along the west coast of India: Measurements and numerical simulations

Digital Repository Service at National Institute of Oceanography (India)

Aboobacker, V.M.; Vethamony, P.; Samiksha, S.V.; Rashmi, R.; Jyoti, K.

] “Impact of sea-breeze on wind-seas off Goa, west coast of India,” Journal of Earth System Science,115(2), 229-234. Rani, S.I., Radhika, R., Subrahamanyam, D.B., Denny, P.A., Kunhikrishnan, P.K. [2010] “Characterization of sea/land breeze circulation...., Praveena, K. [2001] “Study of sea breeze and land breeze along the west coast of Indian sub-continent over the latitude range 15°N to 8°N during INDOEX IFP-99 (SK-141) cruise,”Current Science, 80, 85-88. Sullivan, P.P., Edson. J.B., Hristov, T., Mc...

Distribution of hydromedusae from the exclusive economic zone of the west and east coasts of India

Digital Repository Service at National Institute of Oceanography (India)

Santhakumari, V.; Nair, V.R.

Distribution and abundance of hydromedusae from the exclusive economic zone of the west and east coasts of India is carried out based on zooplankton collections (on board FORV Sagar Sampada) during the period 1985-1990. The 661 samples collected...

Detection of decadal shoreline changes along Dhamara and Maipura coast, Odisha, India

Digital Repository Service at National Institute of Oceanography (India)

ManiMurali, R.; Dhiman, R.; Jayakumar, S.; Ilangovan, D.; Vethamony, P.

activities in the area. Keywords: Remote sensing; Erosion; Accretion; Odisha coast; DSAS. 1. INTRODUCTION The coastline of India comprises of variety of habitats and ecosystems such as sandy and rocky beaches, cliffs, water and lagoons to bays.... These changes are attributed to construction of artificial barriers like breakwater, jetties, etc. (Nayak, 1992). The rising number of coastal disasters along the world’s coastlines throws light on the need for better and more efficient methodologies...

Little genetic variation in the oil sardine, Sardinella longiceps Val., from the western coast of India

Digital Repository Service at National Institute of Oceanography (India)

Menezes, M.R.

Enzyme gene variability in the oil sardine, @iSardinella longiceps@@, from three localities along the western coast of India was studied by starch-gel electrophoresis. Out of 19 loci scored, no locus was polymorphic by the 95% criterion. Seven loci...

On an upwelling front along the west coast of India during later part of southwest monsoon

Digital Repository Service at National Institute of Oceanography (India)

Unnikrishnan, A.S.; Antony, M.K.

A coastal front, associated with upwelling, is identified from the observed thermal field along the west coast of India during September, 1987. The front, which is seen very clearly upto a depth of about 75 m, has a horizontal gradient...

Metal distribution in Halophila beccarii (Aschers) and sorrounding environment along the central west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Jagtap, T.G.

Halophila beccarii (Aschers), the surrounding water and the sediments showed varying concentrations of Na, K, Ca, Mg, Fe, Mn, Cu, Ni, Sr and Li at different localities along central west coast of India. Iron was found to be maximum in both the plant...

Circadian Rhythm of Ambient Noise Off the Southeast Coast of India

Science.gov (United States)

Kannan, R.; Latha, G.; Prashanthi Devi, M.

An ambient noise system consisting of a vertical linear hydrophone array was deployed in the shallow waters off Chennai, southeast coast of India from 1 August to 16 September 2013 to record ambient ocean noise of frequencies up to 10kHz. Biological sounds, which are broadband, short duration signals resulting from Terapon theraps, a native species, are a prominent feature of the ocean soundscape. Terapon activity peaks at 8pm and 11pm, and its presence is not observed after 12 midnight in both the months. In the other period, the ambient noise fluctuation is due to wind and vessel traffic. Hence, the present study focuses on the description of the ambient noise fluctuation over two 12h periods, i.e., 12 midnight-12 noon considered as period I, and 12 noon-12 midnight as period II in order to show the circadian rhythm of ambient noise. In this study area, Terapon vocalization reached 25dB above the ambient noise level and it dominates the short-term spectra records in the 0.4-4kHz range. All Terapon signals had daily patterns of sound production with highest levels of activity after dusk during the study period. The result shows that the circadian rhythm of ambient noise is mainly of biological sound generated by Terapon and it is reported first time in the shallow waters off the southeast coast of India.

Ancient technology of jetties and anchorage system along the Saurastra coast, India

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A; Sundaresh

indicate the existence of several ports, jetties, and anchoring points along the west coast of India from the protohistoric period (Ray 2003). The discovery of many stone structures and anchors at Dwarka suggests that it was a busy port during... stream_size 32184 stream_content_type text/plain stream_name Ancient_Technology_Jetties_Gaur_2016_199a.pdf.txt stream_source_info Ancient_Technology_Jetties_Gaur_2016_199a.pdf.txt Content-Encoding UTF-8 Content-Type text...

Intense blooms of Trichodesmium erythraeum (Cyanophyta) in the open waters along east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Jyothibabu, R.; Madhu, N.V.; Murukesh, N.; Haridas, P.; Nair, K.K.C.; Venugopal, P.

° 44'N, 89° 04'), both along east coast of India. Nutrients (nitrate, phosphate, silicate) concentration in the upper 30 m of the water column showed very low values. High-integrated primary production (Bloom 1- 2160 mgC m-2 d-1, Bloom 2-1740 mgC m-2 d...

Distribution of nutrients in the shelf waters of the Arabian sea along the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Reddy, C.V.G.; Sankaranarayanan, V.N.

The paper presents a descriptive account of the distribution of phosphates, silicates and nitrates in the shelf waters of Arabian Sea along the West Coast of India including a brief mention about the hydrographical features and their relationship...

Spectra and gross features of vertical temperature and salinity profiles off the central west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Varkey, M.J.; Nagarajan, R.

Continuous vertical profiles of temperature and salinity recorded by a CTD-system from the continental slope and the continental rise off Goa, west coast of India, were used for delineating the gross statistical features of the fine structure...

Comparative account of macrofouling ecology at Vijaydurg Harbor and Musakazi-Jaitapur Bay, central western coast of India

Digital Repository Service at National Institute of Oceanography (India)

Sawant, S.S.; Wagh, A.B.

The extent and the nature of fouling were studied on mild steel, aluminum, and stainless steel panels at the Vijaydurg Harbor and Musakazi-Jaitapur Bay on the central western coast of India. In addition, cathodically protected and unprotected panels...

Organotins in the sediments of the Zuari estuary, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Jadhav, S.; Bhosle, N.B.; Massanisso, P.; Morabito, R

., Jadhav, S., Harji, R., Sawant, S., Venket, K., Anil, A. C., 2004. Butyltins in water, biofilm and sediments of the west coast of India. Chemosphere 57, 897-907. Burton, E. D., Phillips, I. R., Hawker, D. W., 2004. Sorption and desorption behaviour... of tributyltin with natural sediments. Environmental Science & Technology 38, 6694 – 6700. Burton, E. D., Phillips, I. R., Hawker, D. W., 2005. In-situ partitioning of butyltin species in estuarine sediments. Chemosphere 59, 585 – 592. Burton, E. D., Phillips...

Regional gravity and magnetic studies over the continental margin of the Central West Coast of India

Digital Repository Service at National Institute of Oceanography (India)

SubbaRaju, L.V.; KameshRaju, K.A.; Subrahmanyam, V.; Rao, D.G.

Institute of Oceanography, Dona Paula, Goa 403 004, India Abstract Gravity studies over the continental margin of the central west coast of India show a sediment thickness of 2-3 km on the shelf associated with deeper hoest and graben structures, of 6 km... sequence ranges from Palaeocene to Recent. Stratigraphy as obtained from the explor atory wells BH-I, DCS-IA, HI2-1, and R6-110cated in the Bombay offshore basin is shown in Figure 2. Figure 3 depicts the seismogeological section of the Bombay offshore...

Post-tsunami relocation of fisher settlements in South Asia: evidence from the Coromandel Coast, India.

Science.gov (United States)

Bavinck, Maarten; de Klerk, Leo; van der Plaat, Felice; Ravesteijn, Jorik; Angel, Dominique; Arendsen, Hendrik; van Dijk, Tom; de Hoog, Iris; van Koolwijk, Ant; Tuijtel, Stijn; Zuurendonk, Benjamin

2015-07-01

The tsunami that struck the coasts of India on 26 December 2004 resulted in the large-scale destruction of fisher habitations. The post-tsunami rehabilitation effort in Tamil Nadu was directed towards relocating fisher settlements in the interior. This paper discusses the outcomes of a study on the social effects of relocation in a sample of nine communities along the Coromandel Coast. It concludes that, although the participation of fishing communities in house design and in allocation procedures has been limited, many fisher households are satisfied with the quality of the facilities. The distance of the new settlements to the shore, however, is regarded as an impediment to engaging in the fishing profession, and many fishers are actually moving back to their old locations. This raises questions as to the direction of coastal zone policy in India, as well as to the weight accorded to safety (and other coastal development interests) vis-à-vis the livelihood needs of fishers. © 2015 The Author(s). Disasters © Overseas Development Institute, 2015.

Radiocarbon dates of sediment cores from inner continental shelf off Taingapatnam, southwest coast of India

International Nuclear Information System (INIS)

Nambiar, A.R.; Rajagopalan, G.

1995-01-01

Radiocarbon dating of carbonized wood samples from three sediment cores from the inner continental shelf off Taingapatnam, in the southwestern coast of India, indicates ages in the bracket 8400-9400 YBP. These radiometric ages correlate well with the ages of carbonized wood from inner continental shelf off Ponnani, Kerala and Karwar, Karnataka. The occurrence of carbonized wood in widely spread offshore areas probably represents a regional transgressive event in the west coast which resulted in submergence and destruction of coastal mangroves. The rate of sedimentation in the study area varies between 0.12 and 0.37 mm/yr, much lower than those reported from shelf areas north of Mangalore. The slow accumulation of sediments in the southern parts of the western continental shelf of India, as exemplified from the present study, may be due to very poor discharge and low bed load sediments of the west-flowing small rivers of this part of the peninsula and low concentration of suspended particulate matter in them. (author). 24 refs., 2 tabs., 2 figs

Nutrient environment of red tide- infested waters off south-west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Joseph, T.; Shaiju, P.; Laluraj, C.M.; Balachandran, K.K.; Nair, M.; George, R.; Nair, K.K.C.; Sahayak, S.; Prabhakaran, M.P.

/Accepted: 28 August 2007 /Published online: 19 September 2007 # Springer Science + Business Media B.V. 2007 Abstract The bloom-infested waters along the south- west coast of India were assessed to bring about... tides, a natural phenomenon, are now common in many coastal waters. Various factors contribute to red tide formation such as insolation, wind, rain, salinity and nutrient input from land or by upwelling. Nitrogen and phosphorus are involved in phytoplank...

Species composition, distribution and abundance of hydromedusae in the Exclusive Economic Zone of the east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Santhakumari, V.

Based on zooplankton collections made by Fisheries Ocean Research Vessel Sagar Sampada Central Marine Fisheries REsearch Institute, India, during the period 1986-1990, 356 samples from 18 cruises from Sri Lanka to Calcutta Coast were analysed...

Simulation of coastal winds along the central west coast of India using the MM5 mesoscale model

Digital Repository Service at National Institute of Oceanography (India)

Pushpadas, D.; Vethamony, P.; Sudheesh, K.; George, S.; Babu, M.T.; Nair, T.M.B.

A high-resolution mesoscale numerical model (MM5) has been used to study the coastal atmospheric circulation of the central west coast of India, and Goa in particular. The model is employed with three nested domains. The innermost domain of 3 km...

A new distributional record of alligator pipefish, Syngnathoides biaculeatus (Bloch, 1785) along Goa, central west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Sanaye, S.V.; Rivonker, C.U.; Ansari, Z.A; Sreepada, R.A

Present study is based on a single male specimen of alligator pipefish, Syngnathoides biaculeatus (Bloch, 1785) collected from the bay-estuarine system of, Goa (central west coast of India) which is the new distributional record for this species. A...

Impact of Equatorial Waves on the Variability of Upwelling Process Along West Coast of India

Science.gov (United States)

Prakash, K. R.; Nigam, T.; Pant, V.

2017-12-01

Coastal upwelling is a seasonal phenomenon along the south eastern Arabian Sea (SEAS) due to favourable wind setup during Indian Summer Monsoon Season (June-September). This upwelling brings subsurface cold and nutrient rich water to the surface layers. The cold water transported northward by the altered along shore current of west coast of India in the post-monsoon season. The different climatological forcing of positive Indian Ocean Dipole (IOD) and normal years were utilised to simulate the upwelling off the west coast of India using a three dimensional Regional Ocean Modelling System (ROMS). Strength of upwelling and the northward transport were found to be weaken for positive IOD simulations as compared to normal years. Analysis suggests that the meridional wind stress weakening resulted into a decrease in strength of West India Coastal Current (WICC) and, therefore, reduced magnitude of offshore Ekman transport. The mixed layer heat budget calculation also supports the findings by showing dominated vertical process in comparison to net heat flux effect. The post-monsoon northward transport of cold water was found to be correlated with the coastally trapped downwelling Kelvin waves. These waves are the only remote forcing from the Bay of Bengal that reaches to the south-eastern Arabian Sea during the months of October-December. The composite of sea surface height anomalies for the positive IOD and normal years shows that the downwelling Kelwin wave was absent during October-December.

Coherence between interannual variability of sea level with some surface met-ocean parameters at Cochin, southwest coast of India

Digital Repository Service at National Institute of Oceanography (India)

Srinivas, K.

for Cochin (southwest coast of India) using long term time series data. Among the parameters, SST, relative density and sea level showed statistically significant long term trends. All the parameters, when smoothed, showed statistically significant...

Studies on fouling diatoms from the Zuari Estuary, Goa (west coast of India)

Digital Repository Service at National Institute of Oceanography (India)

Redekar, P.D.; Wagh, A.B.

from offshore waters of Bombay High area using aluminium panels and recorded 58 species of fouling diatoms Of these Navicula Coscinodiscus Rhizosolenia and Chaetoceros were found to be common The dominance of Centrales over Pennales in water column... on fouling diatoms from the Zuari estuary, Goa (West coast of India) 119 Pangu (1993) used mild steel, aluminium, fiberglass and glass test panels and the immersion period of panels was long (1 month to 11 months) The fouling diatoms from Waghotana...

Village Level Tsunami Threat Maps for Tamil Nadu, SE Coast of India: Numerical Modeling Technique

Science.gov (United States)

MP, J.; Kulangara Madham Subrahmanian, D.; V, R. M.

2014-12-01

The Indian Ocean tsunami (IOT) devastated several countries of North Indian Ocean. India is one of the worst affected countries after Indonesia and Sri Lanka. In India, Tamil Nadu suffered maximum with fatalities exceeding 8,000 people. Historical records show that tsunami has invaded the shores of Tamil Nadu in the past and has made people realize that the tsunami threat looms over Tamil Nadu and it is necessary to evolve strategies for tsunami threat management. The IOT has brought to light that tsunami inundation and runup varied within short distances and for the disaster management for tsunami, large scale maps showing areas that are likely to be affected by future tsunami are identified. Therefore threat assessment for six villages including Mamallapuram (also called Mahabalipuram) which is famous for its rock-cut temples, from the northern part of Tamil Nadu state of India has been carried out and threat maps categorizing the coast into areas of different degree of threat are prepared. The threat was assessed by numerical modeling using TUNAMI N2 code considering different tsunamigenic sources along the Andaman - Sumatra trench. While GEBCO and C-Map data was used for bathymetry and for land elevation data was generated by RTK - GPS survey for a distance of 1 km from shore and SRTM for the inland areas. The model results show that in addition to the Sumatra source which generated the IOT in 2004, earthquakes originating in Car Nicobar and North Andaman can inflict more damage. The North Andaman source can generate a massive tsunami and an earthquake of magnitude more than Mw 9 can not only affect Tamil Nadu but also entire south east coast of India. The runup water level is used to demarcate the tsunami threat zones in the villages using GIS.

An overview of dinoflagellate cysts in recent sediments along the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

DeSilva, M.S.; Anil, A.C.; DeCosta, P.M.

using SURFER Fig. 1—Location map of sampling stations (26 coastal stations and 3 port areas) along the west coast of India. D’SILVA et al.: AN OVERVIEW OF DINOFLAGELLATE CYSTS IN RECENT SEDIMENTS 699 plots (SURFER 8 program). The relative... Xandarodinium variable Bujak Prot.div Protoperidinium latissimum (Kofoid) Balech – Prot.lat Protoperidinium leonis (Pavillard) Balech Quinquecuspis concreta (Reid) Harland Prot.leo Protoperidinium oblongum (Aurivillius) Balech Votadinium calvum Reid Prot...

Probable movement and mixing of contaminants in tidal estuaries - A field study in Kundalika Estuary, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

DineshKumar, P.K.; Sarma, R.V.; Zingde, M.D.

The probable movement and mixing of contaminants within and through the Kundalika river estuary along the west coast of India are studied Neutrally buoyant biplane drogues, floats and dye were tracked at different stages of the tide to assess...

Analysis of magnetic anomalies in relation to Placer deposits and basement configuration off Mirya bay, Central West coast of India

Digital Repository Service at National Institute of Oceanography (India)

Ramana, M.V.

The offshore ilmenite placers off Konkan, central west coast of India, have been surveyed by echosounding, shallow seismic profiling, magnetics, and seabed sampling. The magnetic data show two different types of anomalies: (1) N-S trending high...

On the distribution of fluoride, calcium and magnesium in the waters off the central west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Naik, S.; Dias, C.F.M.

The distribution of fluoride, calcium and magnesium was studied in the waters off the central west coast of India. The averages F/Cl, Ca/Cl and Mg/Cl ratios observed are (6.83 plus or minus 0.023) x 10@u-5@@, (0.02194 plus or minus 0.00068) and (0...

Distribution of butyltins in the waters and sediments along the coast of India.

Science.gov (United States)

Garg, Anita; Meena, Ram M; Jadhav, Sangeeta; Bhosle, Narayan B

2011-02-01

Water and surface sediment samples were analyzed for butyltins (TBT, DBT, MBT) from various ports along the east and west coast of India. The total butyltin (TB) in water samples varied between ~1.7 and 342 ng S nl⁻¹, whereas for sediments it varied between below detection limit to 14861 ng S ng⁻¹ dry weight of sediment. On an average Chennai port recorded the highest level of butyltins in the sediments while Paradip recorded the highest level of butylins in the waters. A fairly good relationship between the TB in the sediment and overlying water samples, as well as between organic carbon and TB, implicates the importance of adsorption/desorption process in controlling the levels of TBT in these port areas. In India the data on organotin pollution is very sparse; most of the port areas have been surveyed for butyltins for the first time during this study. Copyright © 2010 Elsevier Ltd. All rights reserved.

Co-existence of wind seas and swells along the west coast of India during non-monsoon season

Digital Repository Service at National Institute of Oceanography (India)

Rashmi, R.; Aboobacker, V.M.; Vethamony, P; John, M.P

-dimensional significant wind sea heightH ∗S and peak wind sea period T ∗P have been calculated (Fig. 9). The best fit between log (H ∗Sws) and log (T ∗Pws) has been es- timated and resolved as follows: Fig. 7. (a), (b), (c), (d), (e) and (f) are wave energy spectrum, wave... of shallow water waves along Indian coast, J. Coastl. Res., 19, 1052–1065, 2003. Neetu, S., Shetye, S., and Chandramohan, P.: Impact of sea-breeze on wind seas off Goa, west coast of India, J. Earth Sys. Sci., 115, 229–234, 2006. Peterson, E. W. and Hennessey...

Marine magnetic anomalies as a link between the granulite belts of east coast of India and enderby land of Antarctica

Digital Repository Service at National Institute of Oceanography (India)

Murthy, K.S.R.; Rao, M.M.M.; Venkateswarlu, K.; Subrahmanyam, A.S.; Lakshminarayana, S.; Rao, T.C.S.

anomalies and the granulite facies on the east coast of India and their correlation with the granulite belt of Enderby Land of Antarctica supports the view that the entire region comprised of a single and stable block of granulite rocks prior...

Mud Banks along the southwest coast of India are not too muddy for plankton.

Science.gov (United States)

Jyothibabu, R; Balachandran, K K; Jagadeesan, L; Karnan, C; Arunpandi, N; Naqvi, S W A; Pandiyarajan, R S

2018-02-07

Considering Alappuzha Mud Bank in the southern Kerala coast as a typical case of biologically productive Mud Banks that form along the southwest coast of India during the Southwest Monsoon (June - September), the present study addresses several pertinent missing links between the physical environment in Mud Banks and their influence on plankton stock. This study showed that very strong coastal upwelling prevails in the entire study domain during the Southwest Monsoon, which manifests itself in the form of significantly cool, hypoxic and nitrate-rich waters surfacing near the coast. The upwelled water persisting throughout the Southwest Monsoon period was found to have fuelled the exceptionally high phytoplankton stock in the entire study area, including the Mud Bank region. Having accepted that Mud Banks are special because of the calm sea surface conditions and relatively high turbidity level in the water column around them, the present study showed that except at points close to the sea bottom, turbidity level in the Alappuzha Mud Bank was below the critical level to inhibit the plankton stock. The suspended sediments that form in the Mud Bank occasionally could be attributed to the disturbance of the bottom fluid muddy layer and their vertical spurts.

Moisture Supply From the Western Ghats Forests to Water Deficit East Coast of India

Science.gov (United States)

Paul, Supantha; Ghosh, Subimal; Rajendran, K.; Murtugudde, Raghu

2018-05-01

The mountainous western coast of India, known as the Western Ghats, is considered to be a biodiversity hot spot, but it is under a constant threat due to human activities. The region is characterized by high orographic monsoon precipitation resulting in dense vegetation cover. Feedback of such a dense vegetation on the southwest monsoon rainfall is not yet explored. Here we perform regional climate simulations with the Weather Research and Forecasting model and find that evapotranspiration from the vegetation of Western Ghats contributes 25-40% of the southwest monsoon rainfall over the water-deficit state of Tamil Nadu. This contribution reaches 50% during deficit monsoon years or dry spells within a season. Our findings suggest that recent deforestation in this area will affect not only the biodiversity of the region but also the water availability over Peninsular India, which is already impacted by water scarcity.

Probing the phylogenetic relationships of a few newly recorded intertidal zoanthids of Gujarat coast (India) with mtDNA COI sequences.

Science.gov (United States)

Joseph, Sneha; Poriya, Paresh; Kundu, Rahul

2016-11-01

The present study reports the phylogenetic relationship of six zoanthid species belonging to three genera, Isaurus, Palythoa, and Zoanthus identified using systematic computational analysis of mtDNA gene sequences. All six species are first recorded from the coasts of Kathiawar Peninsula, India. Genus: Isaurus is represented by Isaurus tuberculatus, genus Zoanthus is represented by Zoanthus kuroshio and Zoanthus sansibaricus, while genus Palythoa is represented by Palythoa tuberculosa, P. sp. JVK-2006 and Palythoa heliodiscus. Results of the present study revealed that among the various species observed along the coastline, a minimum of 99% sequence divergence and a maximum of 96% sequence divergence were seen. An interspecific divergence of 1-4% and negligible intraspecific divergence was observed. These results not only highlighted the efficiency of the COI gene region in species identification but also demonstrated the genetic variability of zoanthids along the Saurashtra coastline of the west coast of India.

Petroleum hydrocarbon concentrations in ten commercial fish species along Tamilnadu coast, Bay of Bengal, India.

Science.gov (United States)

Veerasingam, S; Venkatachalapathy, R; Raja, P; Sudhakar, S; Rajeswari, V; Asanulla, R Mohamed; Mohan, R; Sutharsan, P

2011-05-01

The aim of the present study was to evaluate the distribution of petroleum hydrocarbons in ten commercial fish species and water samples in three estuaries along Tamilnadu coast, Bay of Bengal, India. Fish and water samples collected from Tamilnadu coast, India, were extracted and analyzed for petroleum hydrocarbons by ultraviolet fluorescence (UVF) spectroscopy. The petroleum hydrocarbon concentration (PHC) in coastal waters and fish species varied between 2.28 and 14.02 μg/l and 0.52 and 2.05 μg/g, respectively. The highest PHC concentration was obtained in Uppanar estuarine waters (14.02 ± 0.83) and the lowest was observed in Vellar estuarine waters (2.28 ± 0.25). Among the ten fish species, Sardinella longiceps have high PHC concentration from all the locations. This study suggests that S. longiceps can be used as a good biological indicator for petroleum hydrocarbon pollution in water. The concentration of petroleum hydrocarbons in coastal waters along Tamilnadu coast is markedly higher than that in the background, but there is no evidence for its increase in fish of this region. From a public health point, petroleum hydrocarbon residue levels in all fish samples analyzed in this study are considerably lower than the hazardous levels. At present, as Tamilnadu coastal area is in a rapid development stage of new harbour, chemical industries, power plants, oil exploration and other large-scale industries, further assessment of petroleum hydrocarbons and the various hydrodynamic conditions acting in the region are to be studied in detail and continuous pollution monitoring studies should be conducted for improving the aquatic environment. The results will also be useful for pollution monitoring program along the coastal region and also to check the levels of petroleum hydrocarbons.

Physical characteristics of the coastal waters between Navapur and Umbharat, West coast of India. Part 2. Vertical homogeneity of temperature and salinity

Digital Repository Service at National Institute of Oceanography (India)

Swamy, G.N.; Sarma, R.V.

Vertical distribution of temperature and salinity at five stations in the coastal waters off Navapur-Umbharat (Maharashtra-Gujarat coast, India) was studied over different seasons during 1978. The results showed that inspite of large tidal...

Association between premonsoonal SST anomaly field in the eastern Arabian Sea and subsequent monsoon rainfall over the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Sadhuram, Y.; RameshBabu, V.; Gopalakrishna, V.V.; Sarma, M.S.S.

-September) summer monsoon rainfall over the central west coast of India. Premonsoonal warm SST anomaly seems to be mainly the result of higher atmospheric subsidence over the ocean and may not be considered as predictor for a good ensuing monsoon, emphasizing...

Shoreline change detection from Karwar to Gokarna - South West coast of India using remotely Sensed data

Digital Repository Service at National Institute of Oceanography (India)

Choudhary, R.; Gowthaman, R.; SanilKumar, V.

-494 #02060313 Copyright ©2013 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved. Shoreline change detection from Karwar to Gokarna - South West coast of India using remotely Sensed data RICHA CHOUDHARY 1 , R. GOWTHAMAN 2 AND V. SANIL KUMAR 2 1... years period. Gangavali river mouth has narrowed due to siltation. Significant changes in the geomorphic features like spit growth, braided island, creeks, tidal flat are observed near Kali and Gangavali river mouth. Keywords: Remote sensing...

Influence of river discharge on abundance and dissemination of heterotrophic, indicator and pathogenic bacteria along the East Coast of India.

Science.gov (United States)

Prasad, V R; Srinivas, T N R; Sarma, V V S S

2015-06-15

In order to examine the influence of discharge from different rivers from peninsular India and urban sewage on intensity and dissemination of heterotrophic, indicator and pathogenic bacteria, a study was carried out during peak discharge period along coastal Bay of Bengal. The coastal Bay received freshwater inputs from the river Ganges while Godavari and Krishna contributed to the south. Contrasting difference in salinity, temperature, nutrients and organic matter was observed between north and south east coast of India. The highest heterotrophic, indicator and pathogenic bacterial abundance was observed in the central coastal Bay that received urban sewage from the major city. Intensity and dissemination of heterotrophic, indicator and pathogenic bacteria displayed linear relation with magnitude of discharge. The coliform load was observed up to 100km from the coast suggesting that marine waters were polluted during the monsoon season and its impact on the ecosystem needs further studies. Copyright © 2015 Elsevier Ltd. All rights reserved.

Zooplankton along the Tamil Nadu coast

Digital Repository Service at National Institute of Oceanography (India)

Santhakumari, V.; Saraswathy, M.

Zooplankton abundance along two sectors at Cape Comorin and Tuticorin of Tamil Nadu Coast, southeast coast of India was studied. High biomass contributed by Ostracods, Salps, Chaetognaths etc., were observed along Tuticorin transect. In the Cape...

Evaluation of multilocus marker efficacy for delineating mangrove species of West Coast India.

Directory of Open Access Journals (Sweden)

Ankush Ashok Saddhe

Full Text Available The plant DNA barcoding is a complex and requires more than one marker(s as compared to animal barcoding. Mangroves are diverse estuarine ecosystem prevalent in the tropical and subtropical zone, but anthropogenic activity turned them into the vulnerable ecosystem. There is a need to build a molecular reference library of mangrove plant species based on molecular barcode marker along with morphological characteristics. In this study, we tested the core plant barcode (rbcL and matK and four promising complementary barcodes (ITS2, psbK-psbI, rpoC1 and atpF-atpH in 14 mangroves species belonging to 5 families from West Coast India. Data analysis was performed based on barcode gap analysis, intra- and inter-specific genetic distance, Automated Barcode Gap Discovery (ABGD, TaxonDNA (BM, BCM, Poisson Tree Processes (PTP and General Mixed Yule-coalescent (GMYC. matK+ITS2 marker based on GMYC method resolved 57.14% of mangroves species and TaxonDNA, ABGD, and PTP discriminated 42.85% of mangrove species. With a single locus analysis, ITS2 exhibited the higher discriminatory power (87.82% and combinations of matK + ITS2 provided the highest discrimination success (89.74% rate except for Avicennia genus. Further, we explored 3 additional markers (psbK-psbI, rpoC1, and atpF-atpH for Avicennia genera (A. alba, A. officinalis and A. marina and atpF-atpH locus was able to discriminate three species of Avicennia genera. Our analysis underscored the efficacy of matK + ITS2 markers along with atpF-atpH as the best combination for mangrove identification in West Coast India regions.

‘Thermohaline front’ off the east coast of India and its generating mechanism

Digital Repository Service at National Institute of Oceanography (India)

HareeshKumar, P.V.; Mathew, B.; RameshKumar, M.R.; Rao, A.R.; Jagadeesh, P.S.V.; Radhakrishnan, K.G.; Shyni, T.N.

in the Bay of Bengal after the monsoon, as a result of intense coastal circulation and stirring by eddies. Key words: Bay of Bengal, Ocean front, East India Coastal Current, ElNino-Dipole year, Anti- cyclonic eddy, Thermal inversion Corresponding..., the temperature profiles show thermal inversion up to ~1.5oC (1.3oC in December) near the coast (17.94oN, 83.83oE) and 1.3oC (0.3oC in December) farther offshore (17.29oN, 84.42oE). The inversion is noticed up to a maximum depth of 55m farther offshore...

Polonium-210 in dried fin fishes of Tuticorin, Southeast coast of India

International Nuclear Information System (INIS)

Carol, R.; Wesley, S.G.

2013-01-01

Tuticorin is one of the major sea-ports and fish-landing centres in the southeastern coast of India. Most of the fishes landed in this coast are consumed fresh and 40% of the fishes are used in the dried form. 210 Po (t 1/2 = 138.4 days) in marine food has received much interest from the scientific community because of its high toxicity and the radioactive dose it delivers to marine organisms and human beings when compared to anthropogenic radionuclides released into coastal waters. Although many studies have been conducted in fresh fishes from various coasts concerning 210 Po, sufficient data are not available for value-added dried marine fish products. In the present study, 210 Po and 210 Pb were quantified in some commercially important dried fishes and their exposure to humans studied. Polonium-210 was determined after wet digestion and counted using an alpha probe. Overall, the concentration of 210 Po in the dried fish muscle tissue ranged from 1.45 ± 0.82 to 559.23 ± 5.45 Bq kg -1 . The highest concentration in the muscle tissue was recorded for the species Stolephorus brevisensis (559.23 ± 8.9 Bq kg -1 ) belonging to the group Clupeidae and the lowest in Harpodon sp. (Bombay duck). The 210 Po dose receive by the public due to consumption of the dried fishes was found to be in the range of 25.2-350.3 μSV yr -1 and the fish samples were found to be radiologically safe. (author)

Placer chromite along south Maharashtra, central west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Gujar, A.R.; Ambre, N.V.; Iyer, S.D.; Mislankar, P.G.; Loveson, V.J.

. An examination of the electron photomicrographs revealed several features of the chromite grains (Figure 5 c to f ). Grains display mechanical breaking such as con- choidal to sub-conchoidal fractures, V-shaped impact depressions and irregular cracks... . In this article we describe the occurrence, mineralogy, geochemistry, transport mechanisms, provenance and economic feasibility of the chromite deposit of south Maharashtra coast. Methodology Surficial and sub-surficial samples from various physi- ographic...

Antibacterial activity of Ulva reticulata from southwest coast of Kanyakumari, India

Directory of Open Access Journals (Sweden)

Sundaram Ravikumar

2016-03-01

Full Text Available Objective: To evaluate the antibacterial activity of Ulva reticulata species collected from the Kanyakumari coast of India to determine their potential for bioactivity. Methods: The algal extract was prepared using n-butanol for evaluating the antibacterial activity of Salmonella typhi, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Vibrio cholerae, Vibrio parahaemolyticus, Bacillus cereus and Listeria monocytogenes. Results: It was observed that the n-butanolic extract of the seaweed powder of Ulva reticulata (25–100 mg/mL exerted notable antibacterial activity against tested bacterial strains. The maximum antibacterial activity was exhibited against Escherichia coli and Bacillus cereus in all concentrations. Conclusions: The results obtained in the present investigation supported the traditional use of the seaweeds against various infections. However, further investigation has been carried out to elucidate the exact mechanism and isolation of active principle.

Identification and characterization of tsunami deposits off southeast coast of India from the 2004 Indian Ocean tsunami: Rock magnetic and geochemical approach

Science.gov (United States)

Veerasingam, S.; Venkatachalapathy, R.; Basavaiah, N.; Ramkumar, T.; Venkatramanan, S.; Deenadayalan, K.

2014-06-01

The December 2004 Indian Ocean Tsunami (IOT) had a major impact on the geomorphology and sedimentology of the east coast of India. Estimation of the magnitude of the tsunami from its deposits is a challenging topic to be developed in studies on tsunami hazard assessment. Two core sediments (C1 and C2) from Nagapattinam, southeast coast of India were subjected to textural, mineral, geochemical and rock-magnetic measurements. In both cores, three zones (zone I, II and III) have been distinguished based on mineralogical, geochemical and magnetic data. Zone II is featured by peculiar rock-magnetic, textural, mineralogical and geochemical signatures in both sediment cores that we interpret to correspond to the 2004 IOT deposit. Textural, mineralogical, geochemical and rock-magnetic investigations showed that the tsunami deposit is featured by relative enrichment in sand, quartz, feldspar, carbonate, SiO 2, TiO 2, K 2O and CaO and by a depletion in clay and iron oxides. These results point to a dilution of reworked ferromagnetic particles into a huge volume of paramagnetic materials, similar to what has been described in other nearshore tsunami deposits (Font et al. 2010). Correlation analysis elucidated the relationships among the textural, mineral, geochemical and magnetic parameters, and suggests that most of the quartz-rich coarse sediments have been transported offshore by the tsunami wave. These results agreed well with the previously published numerical model of tsunami induced sediment transport off southeast coast of India and can be used for future comparative studies on tsunami deposits.

Petroleum hydrocarbon concentrations in eight mollusc species along Tamilnadu coast, Bay of Bengal, India.

Science.gov (United States)

Veerasingam, S; Venkatachalapathy, R; Sudhakar, S; Raja, P; Rajeswari, V

2011-01-01

Eight mollusc species and sediment samples collected from three different stations along Tamilnadu coast, Bay of Bengal, India were analysed for the levels of petroleum hydrocarbons to elucidate the status of the petroleum residues in mollusc meant for human consumption. The concentrations of petroleum hydrocarbons in sediments along Tamilnadu coast varied from 5.04-25.5 microg/g dw (dry weight). High concentration of petroleum hydrocarbons in the sediment of Uppanar estuary (25.5 +/- 1.45 microg/g dw) was perhaps land and marine based anthropogenic sources of this region. The petroleum hydrocarbon residues in eight mollusc species collected from Uppanar, Vellar and Coleroon estuaries varied between 2.44-6.04 microg/g ww (wet weight). Although the concentration of petroleum hydrocarbons in sediment of the Uppanar region was markedly higher than the background, the petroleum hydrocarbon residues in mollusc collected from Uppanar estuary did not suggest bioaccumulation. The results signified that industrial growth has affected the aquatic environments and regular monitoring will help to adopt stringent pollution control measures for better management of the aquatic region.

Accumulation of heavy metals in sediments of marine environments along the southwest coast of India

International Nuclear Information System (INIS)

Manjunatha, B.R.; Yeats, P.A.; Smith, J.N.; Shankar, R.; Narayana, A.C.; Prakash, T.N.

1999-01-01

In order to estimate the rate of excessive sediment accumulation that causes navigational problems and the impacts of urban and industrial development on sediment quality, concentrations of Cu, Ni, Zn, Cr, Mn, Fe and Ca, and radioactivity levels of 210 Pb and 137 Cs have been measured in nineteen sediment cores from estuarine, lagoonal, marsh, backwater and inner shelf areas along the southwest coast of India. Sediment accumulation rates in estuarine, lagoonal, marshy areas of the Karnataka coast (ELMKC) and Cochin Backwaters (CBw) are three to six times higher than those in the adjacent inner shelf areas, consistent with the deposition of terrigenous sediments in the river-sea interaction zones. Hydrogen sulphide was detected in most of the samples; sediment colour varied from shades of gray to dark green. Sediments have lower elemental concentrations and element enrichment factors (EFs) particularly for redox sensitive elements such as Mn due to prevalence of reducing conditions in the sedimentary column. Sediments of ELMKC and CBw have a predominantly terrigenous source. They contain low Ca contents, characteristic of tropical river sediments. In contrast, a higher Ca content of inner shelf sediments off both Karnataka State (ISKS-1) and Kerala State (ISKS-2) implies the importance of additional sediment (CaCO 3 ) flux from the marine biota. Measured Cu, Ni and Zn concentrations are generally low, perhaps reflecting the pristine nature of sediments. However, higher concentrations of Cr at all stations and of Zn at CBw indicate the input of Cr enriched minerals like amphibole and pyroxene from the catchment as well as Zn from anthropogenic sources. Heavy metal accumulation rates are high in estuarine, lagoonal, marsh and backwater areas along the southwest coast of India. This is not only due to the proximity of sources, but also due to high sediment accumulation rates because of the reduction of river flow in river-sea interaction zones owing to particle

Generation of electronic waste in India: Current scenario, dilemmas ...

African Journals Online (AJOL)

This paper tries to quantify the amount of E-waste generated in India with the related stakeholder involvement. Electronic waste (E-waste) or waste electrical and electronic equipments (WEEE), which is relatively a recent addition to the hazardous waste stream, is drawing rapid attention across the globe as the quantity ...

Synechococcus as an indicator of trophic status in the Cochin backwaters, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Rajaneesh, K.M.; Mitbavkar, S.; Anil, A.C.; Sawant, S.S.

that these organisms can serve as good indicators of the trophic status of the water column. 2. Materials and methods 2.1. Study Area Sampling was carried out in an area within the CB, along the west coast (9o 34’ 48” N, 76o 08’ 24” E) of India (Fig.1... of the estuarine system (Jyothibabu et al., 2006). CB is a very important 4    estuarine system of Kerala in terms of fishing and extensive transportation of goods. It is also used for dumping industrial as well as domestic wastes. It has three dredged channels...

Upwelling along the east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Murty, C.S.; Varadachari, V.V.R.

the premonsoon and monsoon periods. Waters from deeper layers of the shelf appear to reach the surface causing considerable fall of surface temperature near the coast. The probable causes for these differences in upwelling along the coast are discussed...

Scientific Journal Publishing in India: Promoting electronic publishing of scholarly journals in India

OpenAIRE

Abraham, Thomas; Minj, Suvarsha

2007-01-01

Provides a report about the Scientific Journal Publishing in India (SJPI) Project which promotes electronic publishing of scholarly journals. It covers briefly the objectives, implementation and outcomes of the Project. Open Journal Systems and Open Archives Harvester were used to achieve the goals of the Project.

Effect of soda ash industry effluent on agarophytes, alginophytes and carrageenophyte of west coast of India.

Science.gov (United States)

Jadeja, R N; Tewari, A

2009-02-15

This paper presents the results of a study on the impact of the effluent released by the soda ash industry on important red and brown macro algal species Gelidiella acerosa, Gracilaria corticata, Soleria robusta, Sargassum tenerrimum, Padina tetrastromatica in the tidal zone around Veraval, on the west coast of India, in the lowest low water tide of December 2003. The study examined the effect of effluent discharge on availability of biomass and percentage of phyco-colloids extraction such as agar, alginic acid and carrageen of these commercial seaweeds.

Identifying the source of tar balls deposited along the beaches of Goa in 2013 and comparing with historical data collected along the West Coast of India

Energy Technology Data Exchange (ETDEWEB)

Suneel, V., E-mail: vasimallas@nio.org [CSIR-National Institute of Oceanography, Dona Paula, Goa 403004 (India); Vethamony, P., E-mail: mony@nio.org [CSIR-National Institute of Oceanography, Dona Paula, Goa 403004 (India); Naik, B.G., E-mail: bgnaik@nio.org [CSIR-National Institute of Oceanography, Dona Paula, Goa 403004 (India); Krishna, M.S., E-mail: moturi@nio.org [CSIR-National Institute of Oceanography, Regional Centre, Visakhapatnam, 530 017 (India); Jadhav, Lakshmikant, E-mail: lakshya87.0@gmail.com [CSIR-National Institute of Oceanography, Dona Paula, Goa 403004 (India)

2015-09-15

Deposition of oil residues, also known as tar balls, is a seasonal phenomenon, and it occurs only in the southwest monsoon season along the west coast of India. This has become a serious environmental issue, as Goa is a global tourist destination. The present work aims at identifying the source oil of the tar balls that consistently depositing along the Goa coast using multi-marker fingerprint technique. In this context, the tar ball samples collected in May 2013 from 9 beaches of Goa coast and crude oils from different oil fields and grounded ship were subject to multi-marker analyses such as n-alkanes, pentacyclic terpanes, regular steranes, compound specific isotope analysis (CSIA) and principle component analysis (PCA). The n-alkane weathering index shows that samples have been weathered to various degrees, and the status of weathering is moderate. Since the international tanker route passes closer to the west coast of India (WCI), it is generally presumed that tanker wash is the source of the tar balls. We found that 2010/2011 tar balls are as tanker wash, but the present study demonstrates that the Bombay High (BH) oil fields can also contribute to oil contamination (tar balls) along ≈ 650 km stretch of the WCI, running from Gujarat in the north to Goa in the south. The simulated trajectories show that all the particles released in April traveled in the southeast direction, and by May, they reached the Goa coast with the influence of circulation of Indian monsoon system. - Highlights: • Multi-marker approach was effective in identifying the source of tar balls. • n-Alkane DRs show weathering effects even within the core of the tar ball. • Tar balls of the west coast of India since 2012 were derived from Bombay High crude. • Tanker-wash is not the only source of tar balls deposited on the beaches of Goa.

Identifying the source of tar balls deposited along the beaches of Goa in 2013 and comparing with historical data collected along the West Coast of India

International Nuclear Information System (INIS)

Suneel, V.; Vethamony, P.; Naik, B.G.; Krishna, M.S.; Jadhav, Lakshmikant

2015-01-01

Deposition of oil residues, also known as tar balls, is a seasonal phenomenon, and it occurs only in the southwest monsoon season along the west coast of India. This has become a serious environmental issue, as Goa is a global tourist destination. The present work aims at identifying the source oil of the tar balls that consistently depositing along the Goa coast using multi-marker fingerprint technique. In this context, the tar ball samples collected in May 2013 from 9 beaches of Goa coast and crude oils from different oil fields and grounded ship were subject to multi-marker analyses such as n-alkanes, pentacyclic terpanes, regular steranes, compound specific isotope analysis (CSIA) and principle component analysis (PCA). The n-alkane weathering index shows that samples have been weathered to various degrees, and the status of weathering is moderate. Since the international tanker route passes closer to the west coast of India (WCI), it is generally presumed that tanker wash is the source of the tar balls. We found that 2010/2011 tar balls are as tanker wash, but the present study demonstrates that the Bombay High (BH) oil fields can also contribute to oil contamination (tar balls) along ≈ 650 km stretch of the WCI, running from Gujarat in the north to Goa in the south. The simulated trajectories show that all the particles released in April traveled in the southeast direction, and by May, they reached the Goa coast with the influence of circulation of Indian monsoon system. - Highlights: • Multi-marker approach was effective in identifying the source of tar balls. • n-Alkane DRs show weathering effects even within the core of the tar ball. • Tar balls of the west coast of India since 2012 were derived from Bombay High crude. • Tanker-wash is not the only source of tar balls deposited on the beaches of Goa

Nesting Habitat Suitability for Olive Ridley Turtles (Lepidochelys Olivacea) at the Gahirmatha Rookery, Odisha Coast of India

OpenAIRE

Satyaranjan BEHERA; Basudev TRIPATHY; Kupuswamy SIVAKUMAR; Binod Chandra CHOUDHURY; Chandrasekhar KAR

2013-01-01

The changes in the beach dynamics at Gahirmatha sea turtle rookery along Odisha coast of India have forced the olive ridley turtles to nests in a non-conducive environment. In the recent past, non-availability of nesting beach due to erosion was hypothesized to be one of the major reasons for non-occurrence of arribada at Gahirmatha. This paper reviews the current status of nesting habitat for olive ridley turtles at Gahirmatha and suggests onshore and offshore developmental activities close ...

The complex estuarine formation of six rivers (Cochin backwaters system on west coast of India) - Sources and distribution of trace metals and nutrients

Digital Repository Service at National Institute of Oceanography (India)

Balachandran, K.K.; Joseph, T.; Nair, K.K.C.; Nair, M.; Joseph, P.S.

The largest backwater system on the western coast of India is the Cochin Backwaters to which 16 major industries discharge nearly 0.104 M m super(3) d super(-1) of wastes containing organic wastes at 260 t d super(-1). The backwater receives...

Investigating sea bed morphology of an estuary located in the western coast of India

Science.gov (United States)

Chowdhury, P.; Behera, M. R.; Ranjan, P.

2016-02-01

Estuaries and tidal inlets are complex natural systems. They form a vital ecosystem and host a plethora of diverse flora and fauna. The major problem associated with them is that they experience both climate effects and human interference in different spatial and temporal scales. The increasing threats of sea level variability and changes in the other ocean parameters like currents, waves, winds and tidal ranges may cause these inlets to behave differently. Mandovi - Zuari is one such complex inlet situated in the western coast of India. It is a major tourist attraction and a home to dense mangrove forest. It experiences mixed tides (mainly semi-diurnal in nature). Also the salinity of this region tends to change seasonally. The annual evolution in morphology of this region is of importance as the sediment transport in this area plays an important role in determining the beach morphology of the adjacent beaches. Tourism being the most important economic driver of this state, it is important to assess the possible changes in the beach morphology over the coming decades. A state-of-the-art process based model, Delft 3D, is used to calculate the annual sediment transport with a focus to understand the morphological evolution history of this inlet. In this regard a hydrodynamic analysis of the region is carried out by forcing a composite tide at the offshore boundary of the model domain to obtain the tidal levels and currents. The sea bed contours are obtained with the help of admiralty charts. For estimating the sediment transport, Van Rijn formula is used as found in the sediment module of Delft 3D. The morphological changes along the coast of Goa, India is estimated and the locations of accretion and erosion are identified.

Small protohistoric sites (fishing villages?) on the saurashtra coast, West Coast of India

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A.S.; Sundaresh

During the maritime archaeological explorations a few sites of protohistoric in nature have been noticed along the saurashtra coast. the trial excavations of a few sites namely Bet Dwarka and Bhokhira on the western saurashtra coast yielded...

Sediments from the Boxing Day tsunami on the coasts of southeastern India and Kenya

Science.gov (United States)

Weiss, R.; Bahlburg, H.

2006-12-01

On the Boxing Day 2004, the world community experienced a catastrophic tsunami in the Indian Ocean and could also saw how unprepared and unaware countries along the Indian ocean were. Beyond the tragedy of the tremendous loss of lives, the result of this event is an opportunity to study a global tsunami (mega-tsunami) in many regards. Here, we report on tsunami sediments left behind on beaches at the coast of Tamil Nadu (India) and on beaches between Malindi and Lamu (Kenya). Characteristic debris accumulations on the beach surface at Tamil Nadu (India) showed the impact of three tsunami waves. In this area, the tsunami climbed ~5 m up the beach; the last traces of a tsunami wave were found ~580 m away from the shoreline. Palm trees indicated an overland flow depth of 3.5 m, ~50 m from the shoreline. The tsunami deposits were up to 30 cm thick. They had an erosional base to the underlying soil and pre-tsunami beach deposits and were made up of moderately well- to well-sorted coarse and medium sand. The sand sheet thins inland, but without a decrease in grain size. Three distinct layers could be identified within the tsunami deposit. The lower one occasionally displayed cross-bedding with foresets dipping landward indicating deposition during run-up. The two upper layers were graded or parallel-laminated without indicators of flow directions. The boundaries between the different layers were marked by dark laminae, rich in heavy minerals. Also, the presence of benthic foraminifera indicates entrainment of sediment into the water column by the incoming tsunami wave in water depths less than 30 m. On beaches between Malindi and Lamu, Kenya, the traces of only one tsunami wave could be found, which attained a run-up height of about 3 m and traveled ~35 m inland with respect to the tidal stage at tsunami impact. The tsunami sediments consist of one layer of fine sand and are predominantly composed of heavy minerals supplied to the sea by nearby rivers. A slight fining

Metal and trace elements assessment in sediments of Kakinada Bay, East Coast India, by INAA and PIXE

International Nuclear Information System (INIS)

Dasari, K.B.; Ratna Raju, M.; Lakshminarayana, S.; Naidu, T.Y.; Raju, V.S.

2012-01-01

Aquatic sediment is more homogeneous in grain-size (< 0.06 mm) distribution, and the fine particles are more capable of adsorbing pollutants than coarser fractions. Aquatic mediums are the receipt of the liquid effluents of the variety of industries, atmosphere changes and anthropogenic processes. Godavari river is one of the most important rivers in India and which is adjoining coast into the Bay of Bengal near Kakinada. The study area viz. Kakinada Bay (Godavari delta) rich in industries, appears to be fragile with thick pile of sediments dipping towards sea and underlain by faults. Hence any change in existing equilibrium would affect aquatic ecosystem. The objective of this study is to quantify the amount of trace, heavy metals ions present in sediments collected from Kakinada Bay, Andhra Pradesh, India. Five sites were selected along the coastal area covering the important potential pollutions sources at Godavari delta. Instrumental neutron activation analysis and particle induced X-ray emission techniques were carried out for trace and some metals determination

Stomach contents of cetaceans incidentally caught along Mangalore and Chennai coasts of India

Science.gov (United States)

Krishnan, Anoop A.; Yousuf, K. S.; Kumaran, P. L.; Harish, N.; Anoop, B.; Afsal, V. V.; Rajagopalan, M.; Vivekanandan, E.; Krishnakumar, P. K.; Jayasankar, P.

2008-03-01

The stomachs of 32 individuals of seven cetacean species incidentally caught in gill net and purseseine fisheries along Mangalore and Chennai coasts (India) between 2004 and 2006 were examined. The whole stomach (fore-gut, mid-gut and hind-gut) was examined in all cases. Prey remains (666 prey items comprising six species of teleosts, one crustacean and one squid species) were found in the stomachs of eight individuals (the remaining 24 stomachs were found to be empty). All cetaceans were found to feed mostly on teleosts with wide range of trophic levels. Based on an index that included frequency of occurrence, percentage by number and by weight, the oil sardine Sardinella longiceps was the main prey in the sample. Cetaceans appear to favour both pelagic as well as demersal prey, possibly indicating surface and benthic feeding habits.

Identifying the source of tar balls deposited along the beaches of Goa in 2013 and comparing with historical data collected along the West Coast of India.

Science.gov (United States)

Suneel, V; Vethamony, P; Naik, B G; Krishna, M S; Jadhav, Lakshmikant

2015-09-15

Deposition of oil residues, also known as tar balls, is a seasonal phenomenon, and it occurs only in the southwest monsoon season along the west coast of India. This has become a serious environmental issue, as Goa is a global tourist destination. The present work aims at identifying the source oil of the tar balls that consistently depositing along the Goa coast using multi-marker fingerprint technique. In this context, the tar ball samples collected in May 2013 from 9 beaches of Goa coast and crude oils from different oil fields and grounded ship were subject to multi-marker analyses such as n-alkanes, pentacyclic terpanes, regular steranes, compound specific isotope analysis (CSIA) and principle component analysis (PCA). The n-alkane weathering index shows that samples have been weathered to various degrees, and the status of weathering is moderate. Since the international tanker route passes closer to the west coast of India (WCI), it is generally presumed that tanker wash is the source of the tar balls. We found that 2010/2011 tar balls are as tanker wash, but the present study demonstrates that the Bombay High (BH) oil fields can also contribute to oil contamination (tar balls) along ≈ 650 km stretch of the WCI, running from Gujarat in the north to Goa in the south. The simulated trajectories show that all the particles released in April traveled in the southeast direction, and by May, they reached the Goa coast with the influence of circulation of Indian monsoon system. Copyright © 2015 Elsevier B.V. All rights reserved.

Assessment of oxidative stress indices in a marine macro brown alga Padina tetrastromatica (Hauck) from comparable polluted coastal regions of the Arabian Sea, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Maharana, D.; Jena, K.B.; Pise, N.M.; Jagtap, T.G.

, and antioxidant defences were measured as catalase (CAT), glutathione S-transferase (GST) and ascorbic acid (AsA), in order to understand their dissimilarity with respect to pollution levels from selective locations along the central west coast of India...

Occurrence and seasonal variation in distribution of fecal indicator bacteria in Tapi estuary along the West coast of India.

Digital Repository Service at National Institute of Oceanography (India)

Borade, S.; Dhawde, R.; Maloo, A.; Gajbhiye, S.N.; Dastager, S.G.

rainfall runoff12-15. Seawaters along the Indian coasts are classified by Central Pollution Control Board of India (CPCB) as fit for commercial fishing, contact recreation and bathing activities when the FC is <100 CFU/mL. Whereas, the USEPA sets FC... limits of 200 CFU/mL natural waters for recreational purposes16. Indicator organisms are often used as a tool to identify the contaminant sources. Therefore, it is important to understand the potential and limitations of these indicator organisms...

The Cradle Coast Personally Controlled Electronic Health Record evaluation research plan

DEFF Research Database (Denmark)

Cummings, Elizabeth; Cheek, Colleen; Van Der Ploeg, Winifred

2012-01-01

In 2010 the Federal Government announced funding over two years to create a Personally Controlled Electronic Health Record (PCEHR) for Australians. One of the wave 2 implementation sites is the Cradle Coast in Tasmania. A PCEHR Program Benefits and Evaluation Partner (BEP) has been appointed to u...

Occurrence of Porphyra vietnamensis (Bangiales, Rhodophyta) along the Goa coast

Digital Repository Service at National Institute of Oceanography (India)

Dhargalkar, V.K.; Agadi, V.V.; Untawale, A.G.

The occurrence of a red alga, Porphyra vietnamensis has been studied along the Goa Coast (west coast of India). The growth period was observed during the monsoon (July-October) and optimum growth was recorded during August, when temperature...

Changing environmental conditions in recent past — Reading through the study of geochemical characteristics, magnetic parameters and sedimentation rate of mudflats, central west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Singh, K.T.; Nayak, G.N.; Fernandes, L.L.; Borole, D.V.; Basavaiah, N.

), +91 982 ak@unigoa.ac.in (G.N. Nayak). rights reserved.nt past — Reading through agnetic parameters and t coast of India a, D.V. Borole c, N. Basavaiah d matology, Palaeoecology ev ie r .com/ locate /pa laeorine sedimentation is usually a reasonably...

Submarine canyons off Madras Coast

Digital Repository Service at National Institute of Oceanography (India)

Setty, M.G.A.P.

Submarine canyons off the coast of Madras, Tamil Nadu, India were studied during cruise of @iINS Kistna@@ as part of the IIOE programme They consist of hill-like projections and V-shaped valleys Their other features are also reported...

Ecosystem degradation in India

International Nuclear Information System (INIS)

Sinha, B.N.

1990-01-01

Environmental and ecosystem studies have assumed greater relevance in the last decade of the twentieth century than even before. The urban settlements are becoming over-crowded and industries are increasingly polluting the air, water and sound in our larger metropolises. Degradation of different types of ecosystem are discussed in this book, Ecosystem Degradation in India. The book has been divided into seven chapters: Introduction, Coastal and Delta Ecosystem, River Basin Ecosystem, Mountain Ecosystem, Forest Ecosystem, Urban Ecosystem and the last chapter deals with the Environmental Problems and Planning. In the introduction the environmental and ecosystem degradation problems in India is highlighted as a whole while in other chapters mostly case studies by experts who know their respective terrain very intimately are included. The case study papers cover most part of India and deal with local problems, stretching from east coast to west coast and from Kashmir to Kanyakumari. (author)

Real-Time Ocean Prediction System for the East Coast of India

Science.gov (United States)

Warrior, H. V.

2016-02-01

The primary objective of the research work reported in this abstract was to develop a Realtime Environmental model for Ocean Dispersion and Impact (as part of an already in-place Decision Support System) for the purpose of radiological safety for the area along Kalpakkam (East Indian) coast. This system involves combining real-time ocean observations with numerical models of ocean processes to provide hindcasts, nowcasts and forecasts of currents, tides and waves. In this work we present the development of an Automated Coupled Atmospheric - Ocean Model (we call it IIT-CAOM) used to forecast the sea surface currents, sea surface temperature (SST) and salinity etc of the Bay of Bengal region under the influence of transient and unsteady atmospheric conditions. This method uses a coupling of Atmosphere and Ocean model. The models used here are the WRF for atmospheric simulations and POM for the ocean counterpart. It has a 3 km X 3 km resolution. This Coupled Model uses GFS (Global Forecast System) Data or FNL (Final Analyses) Data as initial conditions for jump-starting the atmospheric model. The Atmospheric model is run first thus extracting air temperature, wind speed and relative humidity. The heat flux subroutine computes the net heat flux, using above mentioned parameters data. The net heat flux feeds to the ocean model by simply adding net heat flux subroutine to the ocean model code without changing the model original structure. The online forecast of the IIT-CAOM is currently available in the web. The whole system has been automized and runs without any more manual support. The IIT-CAOM simulations have been carried out for Kalpakkam region, which is located on the East coast of India, about 70 km south of Chennai in Tamilnadu State and a three day forecast of sea surface currents, sea surface temperature (SST) and salinity, etc have been obtained.

Study of mangrove environment of Maharashtra coast using remote sensing data

Digital Repository Service at National Institute of Oceanography (India)

Jagtap, T.G.; Untawale, A.G.; Inamdar, S.N.

Analysis of remote sensing data indicate approximately 210 km super(2) of the mangrove area along the Maharashtra coast in India. The dominant species along the coast are Rhizophora mucronata, Avicennia officinalis, A. marina, Sonneratia alba, S...

Nesting Habitat Suitability for Olive Ridley Turtles (Lepidochelys Olivacea at the Gahirmatha Rookery, Odisha Coast of India

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Satyaranjan BEHERA

2013-12-01

Full Text Available The changes in the beach dynamics at Gahirmatha sea turtle rookery along Odisha coast of India have forced the olive ridley turtles to nests in a non-conducive environment. In the recent past, non-availability of nesting beach due to erosion was hypothesized to be one of the major reasons for non-occurrence of arribada at Gahirmatha. This paper reviews the current status of nesting habitat for olive ridley turtles at Gahirmatha and suggests onshore and offshore developmental activities close to Gahirmatha rookery should be monitored efficiently so that future arribada at this rookery should not be troubled due to habitat destruction.

Re-examination of geophysical data off Northwest India: Implications to the Late Cretaceous plate tectonics between India and Africa.

Digital Repository Service at National Institute of Oceanography (India)

Ramana, M.V.; Desa, M.; Ramprasad, T.

The Gop and Laxmi Basins lying off Northwest India have been assigned ambiguous crustal types and evolution mechanisms. The Chagos-Laccadive Ridge (CLR) complex lying along the southwest coast of India has been attributed to different evolutionary...

Documentation of hypoglycemic and wound healing plants in Kodiyampalayam coastal village (southeast coast of India

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Satyavani Kaliamurthi

2014-08-01

Full Text Available Objective: To document the hypoglycemic and wound healing plant species especially halophytes and associates were carried out in the coastal village of Kodiyampalayam (Southeast coast of India. Methods: The data were collected during the month of December 2011 to November 2012 with personal interviews and group discussion of local coastal fisher women community and traditional practitioner. Results: The results indicated the traditional knowledge of 33 medicinal plant species, photographs, vernacular name, habit, active part and their mode of action. Among these, Citrullus colocynthis, Coccinia grandis, Rhizophora apiculata, Rhizophora mucronata, Bruguiera cylindrica, Excoecaria agallocha and Andrographis paniculata were discovered in huge number. Conclusions: This study concludes medicinal uses of halophytes and associates in the coastal area. It will be needed scientific validation for development of novel therapeutic agents.

Subtidal benthic macrofauna of the Mangalore Coast, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Gopalakrishnan, T.C.; Nair, K.K.C.

Subtidal macrobenthic fauna from the Mangalore Coast was studied from the shelf areas between the old Mangalore Port and Suratkal, covering an area of approximately 40 km sup(2). Benthic bivalves were the most abundant group, (36160/m sup(2...

Marine archaeological investigations along the Saurashtra coast, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A.S.; Sundaresh; Tripati, S.

Utilization of the ocean resources on the Saurashtra coast is dating back to the Harappan period (3rd millennium BC) and evidences on the same have been recorded from various archaeological sites such as Lothal, Padri, Nageshwar and Bet Dwarka...

Retrieval and Validation of Chlorophyll-a Concentrations in the Coastal Waters Off Yanam and Kakinada (Godavari) Basin Along East Coast of India.

Digital Repository Service at National Institute of Oceanography (India)

Latha, T.P.; Nagamani, P.V.; Rao, K.H.; Dash, S.K.; Choudhury, S.B.; Rehman, A.; Sarma, V.V.S.S.; Babu, M.N.; Amarendra, P.; Rao, B.S.; Prasad, T.D.V.

-truth data is essential for the retrieval of remote sensing data and the use of various methods to analyze phytoplankton composition that will facilitate interpretation of results in future. The southern Bay of Bengal region along the east coast of India.... 3. Materials and Methods In-situ data Hyperpro-II Hyperspectral Underwater radiometer (Hyperpro-II) from Satlantic Inc. measures the colour of the ocean and its spectral variability throughout the euphotic zone. It provides observations...

Wave statistics around the Indian coast based on ship observed data

Digital Repository Service at National Institute of Oceanography (India)

Chandramohan, P.; SanilKumar, V.; Nayak, B.U.

the rest of the year. Waves are higher during the southwest monsoon (June-September) all around the Indian Coasts, with highest intensity of wave activity occurring off northern part of the West Coast and off southern most part of the peninsular India. Wave...

The beach ridges of India: A review

Digital Repository Service at National Institute of Oceanography (India)

Kunte, P.D.; Wagle, B.G.

, and is presented in a consolidated form. Beach ridges of the east and west coast of India are grouped in thirteen-beach ridge complexes based on their association. Review indicates that the beach ridges of India are not older than the Holocene age...

Studies on sediment transport along Kerala Coast, south west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Sajeev, R.; Chandramohan, P.; Josanto, V.; Sanakaranarayanan, V.N.

Longshore sediment transport characteristics of the Kerala Coast have been examined to delineate various physical processes affecting the different coastal environments. Monthly averages of the daily LEO (Littoral Environmental Observation) data...

Baseline aquatic ecology: a case study of Dahanu thermal power station in west coast of India

International Nuclear Information System (INIS)

Ghosh, T.K.

2002-01-01

Baseline ecological studies of three creeks surrounded to a 500 MW coal based thermal power station that has been installed at Dahanu in west coast of India have been studied. Water samples were collected in summer, post-monsoon and winter seasons from surface, middle and bottom of the water columns at left and right banks and centre of the creeks, during high tide and low tide, and also during day and night for characterization of physico-chemical (temperature, transparency, pH, salinity, dissolved solids, suspended solids, alkalinity, nutrients etc. including heavy metals), microbiological and biological (phytoplankton, primary productivity, zooplankton, meiobenthos and nekton, viz. macrobenthos, fish, prawn, molluscs etc.) parameters. Studies revealed that abiotic features of the creeks were comparable to other similar type of ecosystems in India. Besides detritus, the ecosystem comprised of five trophic levels, viz. producer and consumers 1 through 4. While computing biomass of each trophic level, semialternating pattern of pyramids were obtained. Meiobenthos, comprising of 25 parent of the total biomass of fauna, had a significant role in the ecosystem. Index of biotic integrity, incorporating 25 attributes, was employed to evaluate the impact of predicted rise (2.3 degC) of ambient water temperature on creek biota. Evaluation revealed a marginal positive impact of the project on the ecosystem. (author)

Stone anchors of India: Findings, classification and significance.

Digital Repository Service at National Institute of Oceanography (India)

Tripati, S.

Various types of stone anchors have been observed during inshore and offshore explorations along the east and west coasts of India. The earliest stone anchors of India have been recorded from the Harappan sites (3rd millennium BC), but their shape...

An operational wave forecasting system for the east coast of India

Science.gov (United States)

Sandhya, K. G.; Murty, P. L. N.; Deshmukh, Aditya N.; Balakrishnan Nair, T. M.; Shenoi, S. S. C.

2018-03-01

Demand for operational ocean state forecasting is increasing, owing to the ever-increasing marine activities in the context of blue economy. In the present study, an operational wave forecasting system for the east coast of India is proposed using unstructured Simulating WAves Nearshore model (UNSWAN). This modelling system uses very high resolution mesh near the Indian east coast and coarse resolution offshore, and thus avoids the necessity of nesting with a global wave model. The model is forced with European Centre for Medium-Range Weather Forecasts (ECMWF) winds and simulates wave parameters and wave spectra for the next 3 days. The spatial pictures of satellite data overlaid on simulated wave height show that the model is capable of simulating the significant wave heights and their gradients realistically. Spectral validation has been done using the available data to prove the reliability of the model. To further evaluate the model performance, the wave forecast for the entire year 2014 is evaluated against buoy measurements over the region at 4 waverider buoy locations. Seasonal analysis of significant wave height (Hs) at the four locations showed that the correlation between the modelled and observed was the highest (in the range 0.78-0.96) during the post-monsoon season. The variability of Hs was also the highest during this season at all locations. The error statistics showed clear seasonal and geographical location dependence. The root mean square error at Visakhapatnam was the same (0.25) for all seasons, but it was the smallest for pre-monsoon season (0.12 m and 0.17 m) for Puducherry and Gopalpur. The wind sea component showed higher variability compared to the corresponding swell component in all locations and for all seasons. The variability was picked by the model to a reasonable level in most of the cases. The results of statistical analysis show that the modelling system is suitable for use in the operational scenario.

Data on nearshore wave process and surficial beach deposits, central Tamil Nadu coast, India.

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Joevivek, V; Chandrasekar, N

2017-08-01

The chronicles of nearshore morphology and surficial beach deposits provide valuable information about the nature of the beach condition and the depositional environment. It imparts an understanding about the spatial and temporal relationship of nearshore waves and its influence over the distribution of beach sediments. This article contains data about wave and sediment dynamics of the ten sandy beaches along the central Tamil Nadu coast, India. This present dataset comprises nearshore wave parameters, breaker wave type, beach morphodynamic state, grain size distribution and weight percentage of heavy and light mineral distribution. The dataset will figure out the beach morphology and hydrodynamic condition with respect to the different monsoonal season. This will act as a field reference to realize the coastal dynamics in an open sea condition. The nearshore entities were obtained from the intensive field survey between January 2011 and December 2011, while characteristics of beach sediments are examined by the chemical process in the laboratory environment.

Surf zone dynamics along the south Karnataka Coast between Bhatkal and Ullal, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Chandramohan, P.; SanilKumar, V.; Nayak, B.U.; Raju, N.S.N.

stronger in June, and relatively low and steady during the rest of the year. Coast between Padubidri and Ullal experienced relatively stronger longshore currents than the coast between Maravanthe and Malpe. Longshore sediment transport rate was relatively...

Sediment textural characteristics and elemental distribution in the core sediments, Pullivasal and Kurusadai Island, Gulf of Mannar, Southeast coast of India

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P. Saravanan

2017-12-01

Full Text Available Two core samples were collected in order to assess the textual characteristics and elemental distribution of the sediments, from the lagoonal environment of Pullivasal and Kurusadai island, Gulf of Mannar, Southeast coast of India. The distribution of the organic matter and calcium carbonate is chiefly controlled by the coral debris, shell fragments and mangrove litters. The elemental distribution is controlled by natural process and other trace elements are controlled by anthropogenic land based activities. Keywords: Sediment texture, Coral islands, Gulf of Mannar, Core sediments, Elemental distribution

Petroleum hydrocarbon concentrations in marine sediments along Nagapattinam - Pondicherry coastal waters, Southeast coast of India.

Science.gov (United States)

Kamalakannan, K; Balakrishnan, S; Sampathkumar, P

2017-04-15

In this present study, petroleum hydrocarbons were statistically analyzed in three different coastal sediment cores viz., (N1, P1 and P2) from the Southeast coast of Tamil Nadu, India to examine the viability of PHCs. The significant positive relationship between mud (silt+clay+sand) and PHC unveiled that high specific surface of area of mud content raise the level of PHCs. Cluster analysis was used to discriminate the sediment samples based on their degree of contamination. The present study shows that instead of expensive and destructive PHC chemical methods, magnetic susceptibility is found to be a suitable, cheap and rapid method for detailed study of PHC in marine sediments. This baseline PHCs data can be used for regular ecological monitoring and effective management for the mining and tourism related activities in the coastal ecosystem. Copyright © 2017 The Authors. Published by Elsevier Ltd.. All rights reserved.

Noctiluca and copepods grazing on the phytoplankton community in a nutrient-enriched coastal environment along the southwest coast of India.

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Arunpandi, N; Jyothibabu, R; Jagadeesan, L; Gireeshkumar, T R; Karnan, C; Naqvi, S W A

2017-07-01

The relative grazing impact of Noctiluca scintillans (hereafter referred only Noctiluca) and copepods (Acrocalanus gracilis, Paracalanus parvus, Acartia danae and Oithona similis) on the phytoplankton community in an upwelling-mudbank environment along the southwest coast India is presented here. This study was carried out during the Pre-Southwest Monsoon (April-May) to the Late Southwest Monsoon (August) period in 2014. During the sampling period, large hydrographical transformation was evident in the study area (off Alappuzha, Southwest coast of India); warmer Pre-Southwest Monsoon water column condition got transformed into cooler and nitrate-rich hypoxic waters during the Southwest Monsoon (June-August) due to intense coastal upwelling. Copepods were present in the study area throughout the sampling period with a noticeable increase in their abundance during the Southwest Monsoon. On the other hand, the first appearance of Noctiluca in the sampling location was during the Early Southwest Monsoon (mid-June) and thereafter their abundance increased towards the Peak Southwest Monsoon. The grazing experiments carried out as per the food removal method showed noticeable differences in the feeding preferences of Noctiluca and copepods, especially on the different size fractions of phytoplankton. Noctiluca showed the highest positive electivity for the phytoplankton micro-fraction (av. 0.49 ± 0.04), followed by nano-fraction (av. 0.17 ± 0.04) and a negative electivity for the pico-fraction (av. -0.66 ± 0.06). In total ingestion of Noctiluca, micro-fraction contribution (83.7%) was significantly higher compared to the nano- (15.7%) and pico-fractions (0.58%). On the other hand, copepods showed the highest positive electivity for the phytoplankton nano-fraction (av. 0.38 ± 0.04) followed by micro- (av. -0.17 ± 0.05) and pico-fractions (av. -0.35 ± 0.05). Similarly, in total ingestion of copepods, nano-fraction (69.7%) was the highest followed by micro

Biochemical constituents of seaweeds along the Maharashtra coast

Digital Repository Service at National Institute of Oceanography (India)

Dhargalkar, V.K.; Jagtap, T.G.; Untawale, A.G.

Protein, carbohydrate and organic carbon were estimated in 43 marine algal species from different stations along the Maharashtra Coast in India These species showed variation in their biochemical contents Protein varied from 10 to 33% Chlorophyceae...

Identification of sources of tar balls deposited along the Goa coast, India, using fingerprinting techniques

International Nuclear Information System (INIS)

Suneel, V.; Vethamony, P.; Zakaria, M.P.; Naik, B.G.; Prasad, K.V.S.R.

2013-01-01

Highlights: ► This is first fingerprinting study in India on identification of source of tar balls. ► Tar balls were formed from tanker-wash spills and they resemble floating tar ball. ► δ 13 C values of Bombay High crude oil and the present tar balls do not match. ► Compound specific stable carbon isotope analysis confirmed the source of tar balls. ► Source is confirmed as the South East Asian Crude Oil and not the Bombay High crude. -- Abstract: Deposition of tar balls along the coast of Goa, India is a common phenomenon during the southwest monsoon. Representative tar ball samples collected from various beaches of Goa and one Bombay High (BH) crude oil sample were subjected to fingerprint analysis based on diagnostic ratios of n-alkane, biomarkers of pentacyclic tri-terpanes and compound specific stable carbon isotope (δ 13 C) analysis to confirm the source. The results were compared with the published data of Middle East Crude Oil (MECO) and South East Asian Crude Oil (SEACO). The results revealed that the tar balls were from tanker-wash derived spills. The study also confirmed that the source is not the BH, but SEACO. The present study suggests that the biomarkers of alkanes and hopanes coupled with stable carbon isotope analysis act as a powerful tool for tracing the source of tar balls, particularly when the source specific biomarkers fail to distinguish the source

Diversity, occurrence and socio-economic aspects of snappers and job fish (Family: Lutjanidae) fisheries from Gulf of Mannar region, south-east coast of India.

Digital Repository Service at National Institute of Oceanography (India)

Murugan, A.; Vinod, K.; Saravanan, K.R.; Anbalagan, T.; Saravanan, R.; Sanaye, S.V.; Mojjada, S.K.; Rajagopal, S.; Balasubramanian, T.

Journal of Geo-Marine Sciences Vol. 43 (4), April 2014, pp. 618-633 Diversity, occurrence and socio-economic aspects of snappers and job fish (Family: Lutjanidae) fisheries from Gulf of Mannar region, south-east coast of India A. Murugan...] Introduction The role of human activity on marine ecosystems is receiving increased attention with the perception that human activities are causing considerable economic loss for local fishing communities1. In particular, the increase in fishing pressure...

Integration of rock physical signatures with depositional environments: A case study from East Coast of India

Science.gov (United States)

Mondal, Samit; Yadav, Ashok; Chatterjee, Rima

2018-01-01

Rock physical crossplots from different geological setup along eastern continental margin of India (ECMI) represent diversified signatures. To characterize the reservoirs in rock physics domain (velocity/modulus versus porosity) and then connecting the interpretation with geological model has been the objectives of the present study. Petrophysical logs (total porosity and volume of shale) from five wells located at sedimentary basins of ECMI have been analyzed to quantify the types of shale such as: laminated, dispersed and structural in reservoir. Presence of various shale types belonging to different depositional environments is coupled to define distinct rock physical crossplot trends for different geological setup. Wells from three different basins in East Coast of India have been used to capture diversity in depositional environments. Contact model theory has been applied to the crossplot to examine the change in rock velocity with change in reservoir properties like porosity and volume of shale. The depositional and diagenetic trends have been shown in the crossplot to showcase the prime controlling factor which reduces the reservoir porosity. Apart from that, the effect of geological factors like effective stress, sorting, packing, grain size uniformity on reservoir properties have also been focused. The rock physical signatures for distinct depositional environments, effect of crucial geological factors on crossplot trends coupled with established sedimentological models in drilled area are investigated to reduce the uncertainties in reservoir characterization for undrilled potentials.

Concentrations of Heavy Metals in Commercially Important Oysters from Goa, Central-West Coast of India.

Science.gov (United States)

Shenai-Tirodkar, Prachi S; Gauns, Mangesh U; Ansari, Zakir A

2016-12-01

The major beds of oyster along the central-west coast of India are exposed to different anthropogenic activities and are severely exploited for human consumption. In this viewpoint, tissues of oyster Crassostrea madrasensis, C. gryphoides and Saccostrea cucullata were analyzed for Cu, Ni, Cd and Pb concentrations (dry weight) from Chicalim Bay, Nerul Creek and Chapora Bay in pre-monsoon, monsoon and post-monsoon seasons. A higher concentration of Cu (134.4-2167.9 mg kg -1 ) and Cd (7.1-88.5 mg kg -1 ) was found, which is greater than the recommended limits in all the three species (and sites). Moreover, significant (p metals concentrations among the species, seasons and sites. The high concentrations of Cd and Cu in tissues of edible oyster pose a threat to human health. Therefore, continuous monitoring, people awareness and a stringent government policy should be implemented to mitigate the metal pollution along the studied sites.

Natural radioactivity measurements in beach sand along the South East coast of Tamil Nadu, India

International Nuclear Information System (INIS)

Selvi, B.S.; Vijayakumar, B.; Ravi, P.M.

2017-01-01

Measurement of natural radioactivity in beach sand was carried out along the south east coast of Tamil Nadu, India, The activity concentrations of "2"3"8U, "2"3"2Th and "4"0K in beach sand ranged from 2 to 2,762 Bqkg"-"1 with a mean value of 236 Bq.kg"-"1, 7 to 30,872 Bqkg"-"1 with a mean value of 2,300 Bqkg"-"1 and 6.0 to 890 Bqkg"-"1 with a mean value of 85 Bqkg"-"1, respectively. The Radium Equivalent Activity, the external hazard index, the absorbed dose rate and the annual effective dose were assessed and compared with world average values. The results indicate that the absorbed dose rates range from 10 to 20506 nGyh"-"1 with mean value of 1545 nGy.h"-"1. The annual effective dose range between 0.01 and 25.15 mSvy"-"1, with the mean value of 1.90 mSvy"-"1. (author)

Some geodynamic aspects of the Krishna-Godavari basin, east coast of India

Science.gov (United States)

Murthy, K. S. R.; Subrahmanyam, A. S.; Lakshminarayana, S.; Chandrasekhar, D. V.; Rao, T. C. S.

1995-06-01

Detailed analysis of magnetic data of the Krishna-Godavari offshore basin provides new information on the evolution of this basin since the breakup of Peninsular India in the late Jurassic from the erstwhile Gondwanaland. The results establish the offshore extension of two major onshore cross trends viz, the Chintalapudi and Avanigadda cross trends (CCT and ACT). While the onshore basin is characterized by NE-SW ridges and depressions, the offshore basin is divided essentially into three segments by these two NW-SE cross trends. The Ocean-Continent Boundary (OCB), located at the foot of the continental slope of this region, appears to be the seaward limit of these two cross trends. An isolated source of high magnetic intensity (a hot spot?) is identified near the OCB of Machilipatnam, confined between the two cross trends. The Pranhita Godavari Gondwana graben, located north of CCT, extends into the offshore along two faulted cross trends, viz, the CCT and the newly identified Yanam cross trend. The weak magnetic signature associated with this graben at greater depths in the offshore is probably due to flexural subsidence. Preliminary reconstruction of the evolutionary stages of this basin suggests that the hot spot (Marion ?) with its trace located at the OCB represents the earliest stage of the breakup of east coast of India in the late Jurassic (126 Ma), although the relation between this hotspot and the two cross trends on either side remains unresolved. The breakup was associated with rift phase volcanism, as evidenced by the inferred dyke intrusions in the Nizampatnam bay in the southern part of the basin. The Pranhita Godavari Gondwana graben formed due to this split, pull apart and the subsequent downwarping of the eastern continental margin, appears to be much deeper and wider in the offshore. The NE-SW ridges (Tanuku, Kaza and Bapatla) and the depressions (East and West Godavari and Krishna) of the onshore basin are a consequence of the post-rift vertical

A study of lightning activity over land and oceanic regions of India

Indian Academy of Sciences (India)

important point and above results have strongly motivated us to take up the study of land–land and land–ocean contrast in lightning activity over. India. The geographic regions of India chosen for the present study include: • Eastern region (ER) and western region (WR) of India,. • East coast of India and a strip of six oceanic.

Shoreline change and potential sea level rise impacts in a climate hazardous location in southeast coast of India.

Science.gov (United States)

Jayanthi, Marappan; Thirumurthy, Selvasekar; Samynathan, Muthusamy; Duraisamy, Muthusamy; Muralidhar, Moturi; Ashokkumar, Jangam; Vijayan, Koyadan Kizhakkedath

2017-12-28

Climate change impact on the environment makes the coastal areas vulnerable and demands the evaluation of such susceptibility. Historical changes in the shoreline positions and inundation based on projected sea-level scenarios of 0.5 and 1 m were assessed for Nagapattinam District, a low-lying coastal area in the southeast coast of India, using high-resolution Shuttle Radar Topography Mission data; multi-dated Landsat satellite images of 1978, 1991, 2003, and 2015; and census data of 2011. Image processing, geographical information system, and digital shoreline analysis system methods were used in the study. The shoreline variation indicated that erosion rate varied at different time scales. The end point rate indicated the highest mean erosion of - 3.12 m/year, occurred in 73% of coast between 1978 and 1991. Weighted linear regression analysis revealed that the coast length of 83% was under erosion at a mean rate of - 2.11 m/year from 1978 to 2015. Sea level rise (SLR) impact indicated that the coastal area of about 14,122 ha from 225 villages and 31,318 ha from 272 villages would be permanently inundated for the SLR of 0.5 and 1 m, respectively, which includes agriculture, mangroves, wetlands, aquaculture, and forest lands. The loss of coastal wetlands and its associated productivity will severely threaten more than half the coastal population. Adaptation measures in people participatory mode, integrated into coastal zone management with a focus on sub-regional coastal activities, are needed to respond to the consequences of climate change.

Sedimentary Characteristics of Marine Events from se Coast of India: Case Studies of 2004 Tsunami and 2013 Phailin Cyclone

Science.gov (United States)

Karthikeyan, A.

2015-12-01

its preservations potential are helpful to identify the paleo tsunami sediment characteristics the along east coast of India. The present study can be used as the background for distinguishing the tsunami and cyclone sediments. Keywords: 2004 Tsunami preservation, 2013 phailin cylcone, sedimentology, Topography.

Verdine and glaucony facies from surficial sediments of the eastern continental margin of India

Digital Repository Service at National Institute of Oceanography (India)

Rao, V.P.; Thamban, M.; Lamboy, M.

-trioctahedral Fe-rich 1:l clay mineral. Clay Miner., 23: 237-247. Murthy, K.S.R., 1989. Seismic stratigraphy of Ongole-Paradip continental shelf East coast of India. Indian J. Mar. Sci., 16: 47-58. Murthy, K.S.R., Rao, T.C.S., Subramanyam, AS., Rao, M... at the continent- ocean boundary: the verdine facies. Clay Miner. 25: 477-483. Rao, K.M. and Rao, T.C.S., 1994. Holocene sea levels of Visakhapatnam shelf, East Coast of India. J. Geol. Sot. India, 44: 685-689. Rao, V.P., 1991. Clay mineral distribution...

Preliminary exploration of south Kanara coast of Karnataka

Digital Repository Service at National Institute of Oceanography (India)

Sundaresh

The port along the South Kanara coast of Karnataka, India were explored. At the port Gangolli, submergence of a few houses and sea level changes at the light house have been observed which were attributed to the transgression of the sea during...

Levels of thoron and progeny in high background radiation area of southeastern coast of Odisha (India))

International Nuclear Information System (INIS)

Ramola, R. C.; Gusain, G. S.; Rautela, B. S.; Sagar, D. V.; Prasad, G.; Shahoo, S. K.; Ishikawa, T.; Omori, Y.; Janik, M.; Sorimachi, A.; Tokonami, S.

2012-01-01

Exposure to radon, 222 Rn, is assumed to be the most significant source of natural radiation to human beings in most cases. It is thought that radon and its progeny are major factors that cause cancer. The presence of thoron, 220 Rn, was often neglected because it was considered that the quantity of thoron in the environment is less than that of radon. However, recent studies have shown that a high thoron concentration was found in some regions and the exposure to 220 Rn and its progeny can equal or several time exceed that of 220 Rn and its progeny. The results of thoron and its progeny measurements in the houses of high background radiation area (HBRA) of the southeastern coast of Odisha (India)) presented here. This area is one of the high background radiation areas in India with a large deposit of monazite sand which is the probable source of thoron. Both active and passive methods were employed for the measurement of thoron and its progeny in cement, brick and mud houses in the study area. Thoron concentration was measured using RAD-7 and Raduet. A CR-39 track detector was employed for the measurement of environmental thoron progeny, both in active and passive modes. Thoron and its progeny concentrations were found to be comparatively high in the area. A comparison between the results obtained with various techniques is presented in this paper. (authors)

Levels of thoron and progeny in high background radiation area of southeastern coast of Odisha (India))

Energy Technology Data Exchange (ETDEWEB)

Ramola, R C; Gusain, G S; Rautela, B S [Dept. of Physics, H.N.B. Garhwal Univ., Badshahi Thaul Campus, Tehri Garhwal 249199 (India); Sagar, D V [Health Physics Unit EAD, BARC, IRE, OSCOM, Matikhalo, Ganjam, Odisha 761 045 (India); Prasad, G; Shahoo, S K; Ishikawa, T; Omori, Y; Janik, M [National Inst. of Radiological Sciences, Anagawa 4-9-1, Inage-ku, Chiba 263-8555 (Japan); Sorimachi, A; Tokonami, S [Inst. of Radiation Emergency Medicine, Hirosaki Univ., Aomori 036-8564 (Japan)

2012-07-01

Exposure to radon, {sup 222}Rn, is assumed to be the most significant source of natural radiation to human beings in most cases. It is thought that radon and its progeny are major factors that cause cancer. The presence of thoron, {sup 220}Rn, was often neglected because it was considered that the quantity of thoron in the environment is less than that of radon. However, recent studies have shown that a high thoron concentration was found in some regions and the exposure to {sup 220}Rn and its progeny can equal or several time exceed that of {sup 220}Rn and its progeny. The results of thoron and its progeny measurements in the houses of high background radiation area (HBRA) of the southeastern coast of Odisha (India)) presented here. This area is one of the high background radiation areas in India with a large deposit of monazite sand which is the probable source of thoron. Both active and passive methods were employed for the measurement of thoron and its progeny in cement, brick and mud houses in the study area. Thoron concentration was measured using RAD-7 and Raduet. A CR-39 track detector was employed for the measurement of environmental thoron progeny, both in active and passive modes. Thoron and its progeny concentrations were found to be comparatively high in the area. A comparison between the results obtained with various techniques is presented in this paper. (authors)

Ocean outfall off Mangalore, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Mandal, S.; Chandramohan, P.; Raju, N.S.N.; Pathak, K.C.

Various industries like refineries, petrochemicals, thermal power, iron and steel, copper smelter, nylon and resins, etc. are coming up along the coastal belt of India. They generally intend to discharge the effluent, brine and warm water from...

Maritime archaeological studies in India

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A.S.; Vora, K.H.

India with more than 7000 km long coastline and about 5000 years old maritime history is dotted with several ancient ports. Marine archaeological research during last two and half decades has revealed a number of sites along the Indian coast, which...

Variability in measured current structure on the southwest continental shelf of India

Digital Repository Service at National Institute of Oceanography (India)

DineshKumar, P.K.; Srinivas, K.

-1 Variability in Measured Current Structure on the Southwest Continental Shelf of India P.K. Dinesh Kumar and K. Srinivas National Institute of Oceanography, Regional Centre P.O.Box 1913, Cochin - 682018,India Email: dineshku@niokochi.org ABSTRACT... WORDS: Direct current measurements, tidal currents, southwest coast of India. INTRODUCTION The circulation pattern of the eastern Arabian Sea over the southwest continental shelf of India (inferred...

Perception of electronic medical records (EMRs by nursing staff in a teaching hospital in India

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Naveen Kumar Pera

2014-01-01

Full Text Available Background: Currently, in India, many healthcare organizations and their managements appreciate the advantages of electronic medical records, but they often use them. The current push for universal health coverage in India with National Rural Health Mission (NRHM and National Urban Health Mission (NUHM helping toward healthcare reforms highlights the importance of implementing information technology as a means of cutting costs and improving efficiency in healthcare field. The quality of documentation of patient care rendered at healthcare destinations is very important to showcase the growing stature of healthcare in India. Aims: As maintaining the medical records is very important, storage and retrieval of the information is also important for future patient care. In this regard, implementation of electronic medical records in hospitals is essential. Through this study, we wanted to highlight the perceptions of healthcare personnel, who are in the core team of delivering healthcare, toward implementation of electronic medical records. Methods: A cross-sectional study was carried out among doctors (post-graduates and staff nurses. The sample size for post-graduate students and nurses was 164 and 296, respectively, in this study. The study was carried out during the period from January to June 2013, and a survey was conducted with the help of a validated, pre-tested questionnaire in a tertiary care medical college hospital in India. Results: The results showed that 75% of the study population are comfortable working with electronic medical records. They mentioned that display of diagnosis, medications, and allergies of patients on the records was most important. Their perception was that electronic medical records improve timely decision-making and patient care due to immediate access to the patient′s disease history. Conclusion: The major problems faced by nurses, as per our study, are delay in services due to dispersion of records

Distribution Pattern of Seahorse species (Genus: Hippocampus in Tamilnadu and Kerala Coasts of India

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Aaron Premnath LIPTON

2013-02-01

Full Text Available The survey along the Tamilnadu and Kerala coats of India reveled that six species of seahors (Hippocampus fuscus, H. kelloggi, H. kuda, H. histrix H. mohnikei and H. trimaculatus were distributed with different density. Out of the six species, H. fuscus, H. kuda and H. trimaculatus, were the commonly available species in all the observed areas. In Palk Bay, H. kuda was the dominant species constituting 49.10% of the total seahorses encountered. Hippocampus trimaculatus was the second dominant species which accounting 39.28%. The Gulf of Mannar region also most abounded with H. kuda (68.98% followed by H. trimaculatus (20.80%, H. fuscus (9.80%, H. kelloggi (2.23% and H. histrix (0.37%. In Kerala coast, H. trimaculatus was the dominant species (79.68% followed by H. kuda (9.89%, H. kelloggi (8.33% and H. fuscus (2.08%. To infer the variation of six seahorse species the morphometric and meristic characters were analysed. The important morphometric and meristic characters are trunk rings, tail rings, pectoral and dorsal fin rays, trunk length, tail length, coronet height, head length, snout length, snout depth and head depth. Variation in overall body shape, relative snout length, coronet height, number of tail ring was sufficient to separate the specimens to Hippocampus fuscus, H. kelloggi, H. kuda, H. histrix H. mohnikei and H.trimaculatus. The species density and diversity depends on the habitat and biogeography of those areas. Majority of seahorse fishing in Tamilnadu was by shrimp trawl, by-catch and very few target catch by divers also seen in some villages of Palk Bay and Gulf of Mannar region. The shrimp trawl by-catch only bringing more H. trimaculatus than the other species in Kerala coasts.

Measurements of sea level off Tikkavanipalem - Coast India

Digital Repository Service at National Institute of Oceanography (India)

Joseph, A.; Desai, R.G.P.; Peshwe, V.B.; Desa, E.; VijayKumar, K.; Desa, E.S.; Mehra, P.; Nagvekar, S.

, and meteorological measurements were also made during this one-year period. These measurements have indicated that the sea level along this coast contains contributions from several classes of motions, principally tidal motions and set-up/set-down motions...

Aspects of the biology of the pygmy ribbontail catshark Eridacnis radcliffei (Proscylliidae: Carcharhiniformes) from the south-west coast of India.

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Akhilesh, K V; Bineesh, K K; White, W T; Pillai, N G K

2012-08-01

Biological data are presented for the pygmy ribbontail catshark Eridacnis radcliffei based on specimens collected from the by-catch of the commercial deep-sea shrimp trawl fishery operating in the Arabian Sea off the south-west coast of India. A total of 549 individuals, from 101 to 257 mm total length (L(T)) and 2·2 to 56 g, were collected. The L(T) at first maturity (L(T50)) of females and males was estimated at 183 and 170 mm, respectively, and analysis of stomach contents revealed that E. radcliffei feeds primarily on crustaceans. © 2012 The Authors. Journal of Fish Biology © 2012 The Fisheries Society of the British Isles.

Turbidity of the atmospheric and water at the major ports of India

Digital Repository Service at National Institute of Oceanography (India)

Suresh, T.; Desa, E.; Rodrigues, A.; Ramdasan, K.

The atmospheric and water turbidity observed at nine major ports of India, namely Cochin, Mangalore, Mormugao, Mumbai, Jawaharlal Nehru (JNP), Kandla on the west coast and Tuticorin, Chennai and Visakhapatnam on the east coast, using the parameters...

Sedimentological parameters of beach sediments on the East Coast of India

Digital Repository Service at National Institute of Oceanography (India)

Chauhan, O.S.

stream_size 13 stream_content_type text/plain stream_name J_Coast_Res_6_573.pdf.txt stream_source_info J_Coast_Res_6_573.pdf.txt Content-Encoding ISO-8859-1 Content-Type text/plain; charset=ISO-8859-1 ...

On some aspects of Barrier Islands of the west coast, India

Digital Repository Service at National Institute of Oceanography (India)

Kunte, P.D

stream_size 8 stream_content_type text/plain stream_name J_Coast_Res_11_508.pdf.txt stream_source_info J_Coast_Res_11_508.pdf.txt Content-Encoding ISO-8859-1 Content-Type text/plain; charset=ISO-8859-1 ...

Maritime archaeology of Gujarat: Northwest coast of India

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A; Sundaresh

dominated the Indian Ocean for over a millennia. Underwater investigations have been carried out at various places along the Saurashtra coast and a large number of stone anchors were found. The effect of tide when using jetties and anchoring points along...

Diversity and community structure of dung beetles (Coleoptera: Scarabaeinae associated with semi-urban fragmented agricultural land in the Malabar coast in southern India

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K.S. Venugopal

2012-07-01

Full Text Available An evaluation of the diversity and community structure of dung beetles associated with semiurban agricultural land in the Malabar coast of southern India revealed that urbanization has led to decreased diversity compared to regional forests, and has affected the community status of dung beetles. However, contrary to expectations, species richness was observed to be equivalent to rural agricultural fields in the region. Low abundance of prominent agricultural habitat species indicates that the study area has changed as a result of habitat modification/urbanization, and the prevailing conditions are not ideal for the establishment of the most common species in agriculture belts. Prominence of two less common species, Tiniocellus spinipes and Caccobius vulcanus, indicates these generalist urban adaptable (synanthropic species have become increasingly widespread and locally abundant. The low abundance of tunnelers and rollers is attributed to fragmentation of the urban agricultural belt, low mammalian diversity and dung availability, and the hard nature of the laterite soil in the Malabar coast region.

Composition and physical state of phospholipids in calanoid copepods from India and Norway

Digital Repository Service at National Institute of Oceanography (India)

Farkas, T.; Storebakken, T.; Bhosle, N.B.

The fatty acid composition and physical state of isolated phospholipids obtained from marine copepods collected on the Southwest coast of India (Calanus spp.) and the west coast of Norway (Calanus finmarchicus) were investigated to compare...

Site selection for offshore wind farms along the Indian coast

Digital Repository Service at National Institute of Oceanography (India)

ManiMurali, R.; Vidya, P.J.; Modi, P.; JayaKumar, S.

This study deals with locating the potential sites for offshore wind farms and also deals with feasibility of installing offshore wind farms through scientific examination of the requirements along the coast of India Offshore wind energy is almost...

Destruction of mangrove vegetation by Sphaeroma terebrans along Kerala coast

Digital Repository Service at National Institute of Oceanography (India)

Santhakumari, V.

Extent of damage causEd. by wood boring isopod crustaceans to mangrove vegetation off Kerala Coast, India has been evaluated in this study, based on a survey and monthly collections from two localities in Cochin backwaters system. Eventhough...

Assessment of mangroves from Goa, west coast India using DNA barcode.

Science.gov (United States)

Saddhe, Ankush Ashok; Jamdade, Rahul Arvind; Kumar, Kundan

2016-01-01

Mangroves are salt-tolerant forest ecosystems of tropical and subtropical intertidal regions. They are among most productive, diverse, biologically important ecosystem and inclined toward threatened system. Identification of mangrove species is of critical importance in conserving and utilizing biodiversity, which apparently hindered by a lack of taxonomic expertise. In recent years, DNA barcoding using plastid markers rbcL and matK has been suggested as an effective method to enrich traditional taxonomic expertise for rapid species identification and biodiversity inventories. In the present study, we performed assessment of available 14 mangrove species of Goa, west coast India based on core DNA barcode markers, rbcL and matK. PCR amplification success rate, intra- and inter-specific genetic distance variation and the correct identification percentage were taken into account to assess candidate barcode regions. PCR and sequence success rate were high in rbcL (97.7 %) and matK (95.5 %) region. The two candidate chloroplast barcoding regions (rbcL, matK) yielded barcode gaps. Our results clearly demonstrated that matK locus assigned highest correct identification rates (72.09 %) based on TaxonDNA Best Match criteria. The concatenated rbcL + matK loci were able to adequately discriminate all mangrove genera and species to some extent except those in Rhizophora, Sonneratia and Avicennia. Our study provides the first endorsement of the species resolution among mangroves using plastid genes with few exceptions. Our future work will be focused on evaluation of other barcode markers to delineate complete resolution of mangrove species and identification of putative hybrids.

Tamralipti: The ancient port of India

Digital Repository Service at National Institute of Oceanography (India)

Tripati, S.; Rao, S.R.

20', 87 degrees 55') east coast of India. Other ports of Bengal, such as Satgaon and Sonargaon were also having overseas contacts with Ceylone, Java and Sumatra. In this paper, an attempt is made to synthesize archaeological, literary, epigraphic...

Occurrence of @iDiscocyclina boetonensis@@ and @iCamerina wadiai@@ near Pondicherry, South India

Digital Repository Service at National Institute of Oceanography (India)

Setty, M.G.A.P.

coast of India is very significant because of their near similarity to those found in Indonesia, North America, and also Northwest Frontier Provinces of India (now in Pakistan). The fossil assemblage indicates low energy, quiet water, infra...

Vertical propagation of baroclinic Kelvin waves along the west coast ...

Indian Academy of Sciences (India)

Second, baroclinic Kelvin waves generated in the Bay of Bengal at periods shorter than about 120 ... significant energy remains trapped to the Indian west coast. .... ary condition, enables us to isolate the response of the West India Coastal ...

Coeloseira compressa Hollenb. (Champiaceae, Rhodophyta) - a new marine algal species from Goa, India

Digital Repository Service at National Institute of Oceanography (India)

Deshmukhe, G.V.; Untawale, A.G.

Occurrence of a red algal species Coeloseira is recorded from Bambolim coast, Goa along the central west coast of India. The genus is characterised by the presence of polysporangia, stoloniferous pattern branching, separate secondary branches and a...

Research and Assessment of Learning Environments through Photoelicitation: Graduate Student Perceptions of Electronics Manufacturing in India

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Berdanier, Catherine G. P.; Cox, Monica F.

2015-01-01

This research studies the positive and negative perceptions of graduate students from the United States studying issues of sustainable electronics and electronics manufacturing in India as part of a National Science Foundation Integrative Graduate Education and Research Traineeship (IGERT) curriculum. The purpose of this paper is to discuss the…

Structure and composition of the mangrove forest along the Goa coast

Digital Repository Service at National Institute of Oceanography (India)

Jagtap, T.G.

Composition density and wood volume of the common mangroves along the Goa Coast, India has been studied. Factors like topography, geology, soil type, geomorphology, tides influences composition of the mangroves. 27 locations were randomly selected...

Recent marine archaeological investigations along the Saurashtra coast, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A.S.; Sundaresh; Tripati, S.

., 2004), Bet Dwarka (Gaur et a]., 2005) and Somnath (Rao et al., 1992) have been focal points during the two decades of marine archaeological re- search on the Saurashtra coast. A large amount of data have been collected on seafaring activities... November 2003 for locating the re- mains of some ancient maritime activities such as an- chors, ancient port installation and submerged habitational site, etc. similar to those found at Dwarka, Bet Dwarka and Somnath. Porbandar is mentioned...

Efficacy of potential phage cocktails against Vibrio harveyi and closely related Vibrio species isolated from shrimp aquaculture environment in the south east coast of India.

Science.gov (United States)

Stalin, Nattan; Srinivasan, Pappu

2017-08-01

A diverse set of novel phages infecting the marine pathogenic Vibrio harveyi was isolated from shrimp aquaculture environments in the south east coast of India. Based on initial screening, three phages with a broad host range revealed that the growth inhibition of phage is relatively specific to V. harveyi. They were also able to infect V. alginolyticus and V. parahemolyticus that belonged to the Harveyi clade species from shrimp pond and sea coast environment samples. However, the impact of these phages on their host bacterium are well understood; a one-step growth curve experiment and transmission electron microscope (TEM) revealed three phages grouped under the Myoviridae (VHM1 and VHM2); Siphoviridae (VHS1) family. These phages were further molecular characterized with respect to phage genomic DNA isolates. The randomly amplified polymorphic DNA (RAPD), restriction fragment length polymorphism (RFLP) digestion with HindIII, and major structural proteins were distinguished by sodium-dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE) clearly indicated that all the phage isolates were different, even when they came from the same source, giving an insight into the diversity of phages. Evaluation of microcosm studies of Penaeus monodon larvae infected with V. harveyi (105 CFU mL-1) showed that larvae survival after 96 h in the presence of phage treatment at 109 PFU mL-1 was enhanced when compared with the control. The resolution in over survival highly recommended that this study provides the phage-based therapy which could be an innovative and eco-friendly solution against Vibrio disease in shrimp aquaculture and in the natural environment. Copyright © 2017 Elsevier B.V. All rights reserved.

A study on the zooplankton of the Burhabalanga Estuary, Orissa Coast

Digital Repository Service at National Institute of Oceanography (India)

Ramaiah, Neelam; Chatterji, A.; Madhupratap, M.

Annual variations in the zooplankton biomass and composition during 1991-92 were studied from the inshore, mouth and upstream regions of the Burhabalanga Estuary located in the Orissa Coast (India). Zooplankton biomass was maximum at all...

Assessment of acid leachable trace metals in sediment cores from River Uppanar, Cuddalore, Southeast coast of India

International Nuclear Information System (INIS)

Ayyamperumal, T.; Jonathan, M.P.; Srinivasalu, S.; Armstrong-Altrin, J.S.; Ram-Mohan, V.

2006-01-01

An acid leachable technique is employed in core samples (C1, C2 and C3) to develop a baseline data on the sediment quality for trace metals of River Uppanar, Cuddalore, southeast coast of India. Acid leachable metals (Fe, Mn, Cr, Cu, Ni, Co, Pb, Zn and Cd) indicate peak values at the sulphidic phase and enrichment of metals in the surface layers are due to the anthropogenic activities. Association of trace metals with Fe, Mn indicates their adsorption onto Fe-Mn oxyhydroxides and their correlation with S indicate that they are precipitated as metal sulphides. Factor analysis identified three possible types of geochemical associations and the supremacy of trace metals along with Fe, Mn, S and mud supports their geochemical associations. Factor analysis also signifies that anthropogenic activities have affected both the estuarine and fresh water regions of River Uppanar. - Both natural and anthropogenic factors are affecting metals in sediments

Atmospheric forcing on the seasonal variability of sea level at Cochin, southwest coast of India

Science.gov (United States)

Srinivas, K.; Dinesh Kumar, P. K.

2006-07-01

The seasonal cycles of some atmospheric parameters at Cochin (southwest coast of India) have been studied with a specific emphasis on the role played by them in forcing the seasonal sea level. Equatorward along-shore wind stress as well as equatorward volume transport by coastal currents along the Indian peninsula could play an important role in the sea level low during the premonsoon and southwest monsoon seasons. During postmonsoon season, along-shore wind stress plays no major role in the high sea level whereas this could be due to the poleward volume transport by the coastal along-shore currents. Atmospheric pressure and river discharge do not seem to influence much the sea level during the southwest monsoon period, even though the river discharge during that period is considerable. The sea level was minimal during the southwest monsoon season, when the river discharge was at its annual maximum. The difference between the seasonal march of observed and pressure corrected sea level (CSL) was not significant for the study region. Harmonic analysis of the climatological data on the various parameters revealed that air temperature is the only parameter with a dominance of the semi-annual over the annual cycle. Cross-shore wind stress indicated strong interannual variability whereas relative density showed strong seasonal variability. The climatological seasonal cycles of CSL at eight other tide gauge stations along the west coast of the Indian subcontinent are also examined, to assess the role of various forcings on the seasonal sea level cycle. The signatures of El Nino-Southern Oscillation (ENSO) phenomenon could be seen in some of the parameters (SST, air temperature, atmospheric pressure, along-shore wind stress, relative density and sea level). The signature of ENSO was particularly strong in the case of atmospheric pressure followed by relative density, the variance accounted by the relationship being 47% and 16%, respectively.

Seasonal variability of coastal water quality in bay of Bengal and Palk Strait, Tamilnadu, Southeast Coast of India

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Viswanathan Srinivasan

2013-10-01

Full Text Available The aim of this work was to study the physicochemical parameters of water quality collected from 12 sampling stations from Topputhurai to Muthupet in Vedaranyam located on the southeast coast of India from January to December 2008. Results showed that the DO and nutrients were the maximum in the Bay of Bengal during the monsoon period. High concentration of the nutrients in summer season was obtained near the Muthupet mangroves compared to the Palk Strait, which showed that this acted as a source of nutrients to the adjacent coastal waters. Low concentrations of the nutrients observed in the monsoon could be attributed to the terrestrial runoff from Muthupet lagoon. The physicochemical characteristics of coastal waters between the Point Calimere and Muthupet could be used as a baseline data for the monitoring, conservation and management of Point Calimere Wildlife and Bird sanctuary, Great Vedaranyam swamp and Muthupet mangrove ecosystem.

Biomarker pigment signatures in Cochin back water system - A tropical estuary south west coast of India

Science.gov (United States)

Aneeshkumar, N.; Sujatha, C. H.

2012-03-01

Sedimentary biomarker pigments around Cochin estuary situated in the southwest coast of India were determined by HPLC. Fucoxanthin, an indicator of diatom was observed to be the most abundant carotenoid pigment in the estuary. Dinoflagellate derived carotenoid pigment peridinin was confined in the southern part of estuary and zeaxanthin pigment indicative of cyanobacteria were more found in sites influenced by anthropogenic activities. One compound having close similarity to fucoxanthin was also detected. Alloxanthin (cryptophyceae), chl b (green algae), canthaxanthin, neoxanthin, lutein and peridinin isomer were also detected by spectra and corresponding algal class were identified. The highest concentration of chl a (11.01 μg g-1) found near to the anthropogenic affected area while the lowest chl a (0.65 μg g-1) was recorded in industrial area. Degradation products of chl a, such as pheophorbide and pheophytin were observed and principal mode of mechanism of degradation were derived. Higher pheopigments content than chl a, reflects a density trapping of dead cells and early degradation of phytopigments from grazing activities.

An Ephemeral Dinoflagellate Bloom during Summer Season in Nearshore Water of Puri, East Coast of India

Science.gov (United States)

Baliarsingh, Sanjiba Kumar; Dwivedi, Rashmin; Lotliker, Aneesh A.; Jayashankar, Reeta; Sahu, Biraja Kumar; Srichandan, Suchismita; Samanta, Alakes; Parida, Chandanlal; Srinivasakumar, Tummala; Sahu, Kali Charan

2018-03-01

The present paper reports on the phenomenon of pinkish-red discoloration of the nearshore water of Puri, Odisha on 12th May 2016. Many local newspapers covered this event, as Puri city is a major tourist and pilgrimage place on the east coast of India. Field observations were carried out in order to provide a scientific basis to the event and to elicit possible causes of this discoloration. Taxonomic analysis of the phytoplankton samples revealed the dominance of red colored dinoflagellate species Gonyaulax polygramma, contributing 90% to total phytoplankton population. The localized concentration of G. polygramma was responsible for the pinkish-red discoloration of nearshore water. The exact factor that lay behind the genesis of this bloom could not be delineated due to the short period of its persistence. But two factors - upwelling and anthropogenic nutrient influx - can be viewed as the main cause for this ephemeral bloom. Non-hypoxic conditions in the coastal water following the ephemeral bloom event indicated no significant risk of ecological deterioration to the ambient medium.

Potential ballast water transfer of organisms from the west to the east coast of India: Insights through on board sampling

Science.gov (United States)

Desai, Dattesh V.; Narale, Dhiraj; Khandeparker, Lidita; Anil, Arga Chandrashekar

2018-03-01

The possibility of translocation of organisms via ship's ballast water (BW) during a voyage from Hazira on the west coast to Visakhapatnam on the east coast of India was assessed. Samples of BW during the voyage and discharge and sediment collected subsequent to discharge of BW were collected and analyzed for different abiotic and biotic components. It was observed that the salinity did not change, whereas temperature and pH of BW increased marginally during the voyage. A marginal increase in the dissolved oxygen is observed during rough-very rough sea conditions. A sharp decline in the phytoplankton and zooplankton abundance observed in the initial ballast tank sample compared to natural seawater indicates the impact of ballast water pumping on the plankton community. Changes in the sea state during the voyage (slight-moderate to rough-very rough) resulted in a higher sediment suspension rate and suspended particulate matter and this coincided with higher bacterial abundance followed by increase in phytoplankton. An increase in the phytoplankton abundance in the discharge water could be attributed to the inoculum from the sediment. The abundance of zooplankton decreased from the start till the end of the voyage, with high numbers of dead zooplankton in the discharge sample.

Waves in Gulf of Mannar and Palk Bay around Dhanushkodi, Tamil Nadu, India

Digital Repository Service at National Institute of Oceanography (India)

Gowthaman, R.; SanilKumar, V.; Dwarakish, G.S.; Mohan, S.S.; Singh, J.; AshokKumar, K.

., Wave characteris- tics off Visakhapatnam coast during a cyclone. Curr. Sci., 2004, 86, 1524–1529. 3. Nayak, B. U., Chandramohan, P. and Sakhardande, R. K., Sea- sonal distribution of wave heights off Yanam on the east coast of India. Indian J. Inst...

Adoption of Electronic Health Records: A Roadmap for India

Science.gov (United States)

2016-01-01

Objectives The objective of the study was to create a roadmap for the adoption of Electronic Health Record (EHR) in India based an analysis of the strategies of other countries and national scenarios of ICT use in India. Methods The strategies for adoption of EHR in other countries were analyzed to find the crucial steps taken. Apart from reports collected from stakeholders in the country, the study relied on the experience of the author in handling several e-health projects. Results It was found that there are four major areas where the countries considered have made substantial efforts: ICT infrastructure, Policy & regulations, Standards & interoperability, and Research, development & education. A set of crucial activities were identified in each area. Based on the analysis, a roadmap is suggested. It includes the creation of a secure health network; health information exchange; and the use of open-source software, a national health policy, privacy laws, an agency for health IT standards, R&D, human resource development, etc. Conclusions Although some steps have been initiated, several new steps need to be taken up for the successful adoption of EHR. It requires a coordinated effort from all the stakeholders. PMID:27895957

Adoption of Electronic Health Records: A Roadmap for India.

Science.gov (United States)

Srivastava, Sunil Kumar

2016-10-01

The objective of the study was to create a roadmap for the adoption of Electronic Health Record (EHR) in India based an analysis of the strategies of other countries and national scenarios of ICT use in India. The strategies for adoption of EHR in other countries were analyzed to find the crucial steps taken. Apart from reports collected from stakeholders in the country, the study relied on the experience of the author in handling several e-health projects. It was found that there are four major areas where the countries considered have made substantial efforts: ICT infrastructure, Policy & regulations, Standards & interoperability, and Research, development & education. A set of crucial activities were identified in each area. Based on the analysis, a roadmap is suggested. It includes the creation of a secure health network; health information exchange; and the use of open-source software, a national health policy, privacy laws, an agency for health IT standards, R&D, human resource development, etc. Although some steps have been initiated, several new steps need to be taken up for the successful adoption of EHR. It requires a coordinated effort from all the stakeholders.

Environmental impact assessment of sand mining from the small catchment rivers in the southwestern coast of India: a case study.

Science.gov (United States)

Sreebha, Sreedharan; Padmalal, Damodaran

2011-01-01

In the past few decades, the demand for construction grade sand is increasing in many parts of the world due to rapid economic development and subsequent growth of building activities. This, in many of the occasions, has resulted in indiscriminate mining of sand from in-stream and floodplain areas leading to severe damages to the river basin environment. The case is rather alarming in the small catchment rivers like those draining the southwestern coast of India due to limited sand resources in their alluvial reaches. Moreover, lack of adequate information on the environmental impact of river sand mining is a major lacuna challenging regulatory efforts in many developing countries. Therefore, a scientific assessment is a pre-requisite in formulating management strategies in the sand mining-hit areas. In this context, a study has been made as a case to address the environmental impact of sand mining from the in-stream and floodplain areas of three important rivers in the southwestern coast of India namely the Chalakudy, Periyar and Muvattupuzha rivers, whose lowlands host one of the fast developing urban-cum-industrial centre, the Kochi city. The study reveals that an amount of 11.527 million ty(-1) of sand (8.764 million ty(-1) of in-stream sand and 2.763 million ty(-1) of floodplain sand) is being mined from the midland and lowland reaches of these rivers for construction of buildings and other infrastructural facilities in Kochi city and its satellite townships. Environmental Impact Assessment (EIA) carried out as a part of this investigation shows that the activities associated with mining and processing of sands have not only affected the health of the river ecosystems but also degraded its overbank areas to a large extent. Considering the degree of degradation caused by sand mining from these rivers, no mining scenario may be opted in the deeper zones of the river channels. Also, a set of suggestions are made for the overall improvement of the rivers and its

Environmental Impact Assessment of Sand Mining from the Small Catchment Rivers in the Southwestern Coast of India: A Case Study

Science.gov (United States)

Sreebha, Sreedharan; Padmalal, Damodaran

2011-01-01

In the past few decades, the demand for construction grade sand is increasing in many parts of the world due to rapid economic development and subsequent growth of building activities. This, in many of the occasions, has resulted in indiscriminate mining of sand from instream and floodplain areas leading to severe damages to the river basin environment. The case is rather alarming in the small catchment rivers like those draining the southwestern coast of India due to limited sand resources in their alluvial reaches. Moreover, lack of adequate information on the environmental impact of river sand mining is a major lacuna challenging regulatory efforts in many developing countries. Therefore, a scientific assessment is a pre-requisite in formulating management strategies in the sand mining-hit areas. In this context, a study has been made as a case to address the environmental impact of sand mining from the instream and floodplain areas of three important rivers in the southwestern coast of India namely the Chalakudy, Periyar and Muvattupuzha rivers, whose lowlands host one of the fast developing urban-cum-industrial centre, the Kochi city. The study reveals that an amount of 11.527 million ty-1 of sand (8.764 million ty-1 of instream sand and 2.763 million ty-1 of floodplain sand) is being mined from the midland and lowland reaches of these rivers for construction of buildings and other infrastructural facilities in Kochi city and its satellite townships. Environmental Impact Assessment (EIA) carried out as a part of this investigation shows that the activities associated with mining and processing of sands have not only affected the health of the river ecosystems but also degraded its overbank areas to a large extent. Considering the degree of degradation caused by sand mining from these rivers, no mining scenario may be opted in the deeper zones of the river channels. Also, a set of suggestions are made for the overall improvement of the rivers and its

India.

Science.gov (United States)

1985-05-01

In this discussion of India attention is directed to the following: the people; geography; history; government; political conditions; the economy; foreign relations (Pakistan and Bangladesh, China, and the Soviet Union); defense; and the relations between the US and India. In 1983 India's population was estimated at 746 million with an annual growth rate of 2.24%. The infant mortality rate was estimated at 116/1000 in 1984 with a life expectancy of 54.9 years. Although India occupies only 2.4% of the world's land area, it supports nearly 15% of the world's population. 2 major ethnic strains predominate in India: the Aryan in the north and the Dravidian in the south, although the lines between them are blurred. India dominates the South Asian subcontinent geographically. The people of India have had a continuous civilization since about 2500 B.C., when the inhabitants of the Indus River Valley developed an urban culture based on commerce, trade, and, to a lesser degree, agriculture. This civilization declined about 1500 B.C. and Aryan tribes originating in central Asia absorbed parts of its culture as they spread out over the South Asian subcontinent. During the next few centuries, India flourished under several successive empires. The 1st British outpost in South Asia was established in 1619 at Surat on the northwestern coast of India. The British gradually expanded their influence until, by the 1850s, they controlled almost the entire area of present-day India. Independence was attained on August 15, 1947, and India became a dominion within the Commonwealth of Nations with Jawaharlal Nehru as prime minister. According to its constitution, India is a "sovereign socialist secular democratic republic." Like the US, India has a federal form of government, but the central government in India has greater power in relation to its states, and government is patterned after the British parliamentary system. The Congress Party has ruled India since independence with the

Impact of shipwrecks on the morphology of world coasts: A review

Digital Repository Service at National Institute of Oceanography (India)

Mascarenhas, A; ManiMurali, R.

Role of the grounded ship MV River Princess in activating erosion along the Candolim to Sinquerim coast of Goa, India, is evaluated Beach and dune system was severely affected, as over a kilometre long strip of coastal sand dunes were destroyed...

Why is mean sea level along the Indian coast higher in the Bay of Bengal than in the Arabian Sea?

Digital Repository Service at National Institute of Oceanography (India)

Shankar, D.; Shetye, S.R.

Levelling observations conducted during the Great Trigonometrical Survey of India (1858-1909) and subsequent observations showed that mean sea level along the coast of India is higher in the Bay of Bengal than in the Arabian Sea, the difference...

Total mercury in water, sediments, and animals along the Indian Coast

Digital Repository Service at National Institute of Oceanography (India)

Sanzgiri, S.; Mesquita, A.; Kureishy, T.W.

Total mercury (Hg) in water, sediments and animals along the coast of India is estimated. Water samples were collected on board of R.V. Gaveshani.The zooplankton samples were collected by Indian Ocean Standard Net and Heron Tranter nets of 500 mesh...

Trace metal enrichments in core sediments in Muthupet mangroves, SE coast of India: Application of acid leachable technique

International Nuclear Information System (INIS)

Janaki-Raman, D.; Jonathan, M.P.; Srinivasalu, S.; Armstrong-Altrin, J.S.; Mohan, S.P.; Ram-Mohan, V.

2007-01-01

Core sediments from Mullipallam Creek of Muthupet mangroves on the southeast coast of India were analyzed for texture, CaCO 3 , organic carbon, sulfur and acid leachable trace metals (Fe, Mn, Cr, Cu, Ni, Co, Pb, Zn and Cd). Textural analysis reveals a predominance of mud while CaCO 3 indicates dissolution in the upper half of the core, and reprecipitation of carbonates in reduction zones. Trace metals are diagenetically modified and anthropogenic processes control Pb and, to some extent, Ni, Zn and Fe. A distinct event is identified at 90 cm suggesting a change in deposition. Strong relationship of trace metals with Fe indicates that they are associated with Fe-oxyhydroxides. The role of carbonates in absorbing trace metals is evident from their positive relationship with trace metals. Comparison of acid leachable trace metals indicates increase in concentrations in the study area and the sediments act as a sink for trace metals contributed from multiple sources. - Natural and anthropogenic trace metals afeecting mangrove sediments

A new distributional record for the sea cucumber Holothuria (Semperothuria) cinerascens (Brandt) from Goa coast

Digital Repository Service at National Institute of Oceanography (India)

Shirwaikar, P.; Parulekar, A.H.

Occurrence of sea cucumber, Holothuria (Semperothuria) cinerascens from intertidal region of Anjuna (Goa) along central west coast of India is reported. Notes on morphological characteristics are given...

Antibacterial activity of starfish Stellaster equestris from Southeast Coast of India

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Kolandhasamy Prabhu

2013-10-01

Full Text Available Objective: To isolate and characterize the antibacterial compounds from starfish Stellaster equestris (S. equestris. Methods: The starfish S. equestris was collected from Mudasalodai, southeast coast of India. The whole body was extracted with high polar and medium polar solvents such as methanol and ethanol. The antibacterial activity has been tested against human bacterial pathogens using standard disc diffusion method. Results: The present investigation exhibited that the crude methanol extract showed the maximum zone inhibition [(9.7±0.3 mm] against Escherichia coli (E. coli and Vibrio parahaemolyticus at 100% concentration and minimum was Staphylococcus aureus [(4.0±0.6 mm]. The crude ethanol extract showed maximum zone of inhibition in E. coli [(9.70±0.33 mm] and the lowest concentration exhibited the minimum inhibition activity against all bacterial pathogens. The fractions showed the maximum inhibition zone in Klebsiella oxytoca (5.00±0.82 mm, Salmonella typhi (S. typhi (5.00±0.82 and Staphylococcus aureus [(3.0±2.3 mm]. One way ANOVA analysis of antibacterial activity showed no significant difference at 0.05% level (P>0.05. The crude ethanol extract showed the minimum inhibitory concentration against E. coli (100%, Klebsiella pneumoniae (75%, S. typhi (100% and Vibrio cholerae (100%. The fraction exhibited the minimum inhibitory concentration against Klebsiella pneumonia, Proteus mirabilis, S. typhi, Staphylococcus aureus and Vibrio cholerae at 100% whereas E. coli was at 75% concentration. No bacterial growth was observed against Klebsiella oxytoca at 100% concentration. Conclusions: The result of the present study indicates that the crude and fractions of starfish S. equestris have remarkable antimicrobial activities against human bacterial pathogens. Further fraction has been characterised by using GC-MS and 1 H and 13 NMR spectroscopy analysis.

Enhanced Schottky signals from electron-cooled, coasting beams in a heavy-ion storage ring

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Krantz, C., E-mail: claude.krantz@mpi-hd.mpg.d [Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg (Germany); Blaum, K.; Grieser, M. [Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg (Germany); Litvinov, Yu.A. [Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg (Germany); GSI Helmholtzzentrum fuer Schwerionenforschung, Planckstrasse 1, D-64291 Darmstadt (Germany); Repnow, R.; Wolf, A. [Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg (Germany)

2011-02-11

Measurements at the Test Storage Ring of the Max-Planck-Institut fuer Kernphysik in Heidelberg (Germany) have shown that the signal amplitude induced in a Schottky-noise pickup electrode by a coasting electron-cooled ion beam can be greatly enhanced by exposure of the latter to a perturbing radiofrequency signal which is detuned from the true beam revolution frequency. The centre frequencies obtained from harmonic analysis of the observed pickup signal closely follow those imposed on the ions by the electron cooling force. The phenomenon can be exploited to measure the true revolution frequency of ion beams of very low intensity, whose pure Schottky noise is too weak to be measurable under normal circumstances.

Indoor thoron studies along the northeast coast of Andhra Pradesh, India

International Nuclear Information System (INIS)

Vinay Kumar Reddy, K.; Sudarshan, A.; Gopal Reddy, Ch.; Yadagiri Reddy, P.; Rama Reddy, K.

2013-01-01

The beach sands of the northeast coast of Andhra Pradesh are well known for heavy metal mineralization. The process of extraction of the metals can enhance the natural background radiation levels and hence it is essential to establish the radiological base-line data to take necessary remedial action to preserve and protect the coastal environment. The assessment of indoor radioactivity levels has been carried out by choosing 13 villages long the northeast coast of Andhra Pradesh covering around 150 km from Vishakapattanam to Kalingapattanam. The present paper discusses the indoor thoron levels in the areas along the northeast coast of Andhra Pradesh. The SSNTD based twin chamber dosimeters were employed for the assessment of the concentration of thoron and its progeny levels. The average indoor thoron concentrations in this area are found to be 44.1 ± 28.2 Bq.m -3 . The inhalation dose due to thoron has been evaluated using equilibrium factors and discussed in detail. (author)

Shallow gas charged sediments off the Indian west coast: Genesis and distribution

Digital Repository Service at National Institute of Oceanography (India)

Mazumdar, A.; Peketi, A.; Dewangan, P.; Badesab, F.K.; Ramprasad, T; Ramana, M.V.; Patil, D.J.; Dayal, A.M.

Geophysical and geochemical surveys were carried out off Goa, central west coast of India, to understand the genesis and distribution of shallow gases in marine sediments. Shallow gas charged sediments within the water depths of approx. 15 to 40 m...

Observations of the sub-inertial, near-surface East India Coastal Current

Science.gov (United States)

Mukhopadhyay, S.; Shankar, D.; Aparna, S. G.; Mukherjee, A.

2017-09-01

We present surface current measurements made using two pairs of HF (high-frequency) radars deployed on the east coast of India. The radar data, used in conjunction with data from acoustic Doppler current profiler (ADCP) measurements on the shelf and slope off the Indian east coast, confirm that the East India Coastal Current (EICC) flows poleward as a deep current during February-March. During the summer monsoon, when the EICC flows poleward, and October-December, when the EICC flows equatorward, the current is shallow (art Ocean General Circulation Model, run at a resolution of 0.1 ° × 0.1 ° , shows that the model is able to simulate only the low-frequency variability.

A new species of pouched octopus, Cistopus Gray, 1849 (Cephalopoda: Octopodidae) from the southwest coast of India.

Science.gov (United States)

Sreeja, Vijayamma; Norman, Mark D; Kumar, Appukuttannair Biju

2015-12-16

Octopuses of the genus Cistopus Gray, 1849 are commercially valuable catches in the cephalopod fisheries of India. The primary and unique diagnostic character of this genus is the possession of eight small mucous pouches embedded in the oral faces of the webs between the bases of each arm. Historically only a single species of Cistopus, C. indicus, had been reported from Indian waters. In reviewing the octopod fauna off the Kerala coast, we have detected three species of Cistopus, of which one is described here as a new species. Cistopus platinoidus sp. nov. is distinct from Cistopus species described to date (C. indicus, C. taiwanicus and C. chinensis) on the basis of sucker counts, the number and position of enlarged suckers in males, and presence/absence of a calamus. Our studies of catch composition of Kerala octopod fisheries indicate a higher diversity of target species than previously suspected, including a number of undescribed species. Taxonomic resolution and collation of biological and distributional data are required for effective monitoring and management of these valuable fisheries.

Morphology and tectonics of Mahanadi Basin, northeastern continental margin of India from geophysical studies

Digital Repository Service at National Institute of Oceanography (India)

Subrahmanyam, V.; Subrahmanyam, A.S.; Murty, G.P.S.; Murthy, K.S.R.

the breakup of India from Antarctica. The model studies suggest that the northern part of the 85 degrees E Ridge abuts the coast at Chilika Lake. The shape of 2000 m isobath over the northeastern continental margin of India closely resembles to that of 2000 m...

Geochemical peculiarities of marine sediment in coastal areas of India

International Nuclear Information System (INIS)

Gothankar, S.S.; Jha, S.K.; Tripathi, R.M.

2014-01-01

To understand the impact of anthropogenic activity on coastal marine environment, sediment samples were collected covering the west and east coast of India. The elemental concentration was determined using EDXRF technique. The east coast showed lower Rb/Sr ratio reflecting higher fraction of biogenic deposits, the higher ratio at the west coast reflects higher fraction of terrigenous detritus. The concentration of Pb and Ni was found higher at Rameshwaram and Okha respectively. The result indicates the impact of land based source of pollutant in few locations due to the anthropogenic activities. (author)

Occurrence of sea spider Endeis mollis Carpenter (Arthropoda: Pycnogonida on the test panels submerged in Gulf of Mannar, southeast coast of India

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S. Satheesh

2012-06-01

Full Text Available Sea spiders (Pycnogonids are exclusively marine arthropods with worldwide distribution. Pycnogonida remains one of the poorly investigated groups encountered in fouling communities. In the present study, distribution pycnogonid species Endeis mollis associated with the fouling community developed on test panels submerged at Kudankulam coast, Gulf of Mannar was studied for a period of two years. Throughout the period of investigation, Endeis mollis was observed on the test panels. A maximum of 55 individuals per square dm was observed during pre-monsoon season and a minimum of 9 individuals per square dm during monsoon season. Results of this study on seasonal distribution are of considerable interest because so little has been documented on the ecology of Pycnogonids in India.

Use of Electronic Journals in Astronomy and Astrophysics Libraries and Information Centres in India: A Librarians' Perspective

Science.gov (United States)

Pathak, S. K.; Deshpande, N. J.; Rai, V.

2010-10-01

The objectives of this study were to find out whether librarians are satisfied with the present infrastructure for electronic journals and also to find out whether librarians are taking advantage of consortia. A structured questionnaire for librarians was divided into eight parts which were further sub-divided and designed to get information on various aspects of library infrastructure and usage of electronic journals. The goal was to find out the basic minimum infrastructure needed to provide access to electronic journals to a community of users and to facilitate communication in all major astronomy & astrophysics organizations in India. The study aims to highlight key insights from responses of librarians who are responsible for managing astronomy & astrophysics libraries in India and to identify the information needs of the users. Each community and discipline will have its own specific legacy of journal structure, reading, publishing, and researching practices, and time will show which kinds of e-journals are most effective and useful.

'Saurashtra stone anchors' (Ring-stones) from Dwarka and Somnath, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A.S.; Sundaresh; Tripati, S.; Gudigar, P.; Bandodkar, S.N.

Last two decades of marine archaeological research along the Indian coast has brought to light a large number of stone anchors of different types and sizes, indicating that the Indian coast has witnessed brisk maritime activities in the past...

Characterization of Porteresia coarctata beds along the Goa coast, India

Digital Repository Service at National Institute of Oceanography (India)

Jagtap, T.G.; Bhosale, S.H.; Charulata, S.

Porteresia coarctata, forms an important constituent in the plant succession leading to formation of mangrove communities along the estuaries in India. Major beds along the Mandovi estuary of Goa were monitored for their various ecological...

Pesticide residues in sediments from the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Sarkar, A.; SenGupta, R.

An average of 55,000 t of pesticides (including or organochlorine compounds) are used every year in India for agricultural purposes. The cumulative effects of these pesticides on the coastal environment can be expected to be considerable...

Restoration of mangroves along the central west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Untawale, A.G.

of various measures taken by the Ministry of Environment and Forests, Government of India. New Delhi, conservation and management policies were initiated between 1985-1995. During this period it was observed, with remote sensing techniques, that vast...

Quantitative estimation of sediment erosion and accretion processes in a micro-tidal coast.

Digital Repository Service at National Institute of Oceanography (India)

Dora, G.U.; SanilKumar, V.; Vinayaraj, P.; Philip, C.S.; Johnson, G.

estuary is one of the productive estuarine zones along west coast of India, and also a popular tourist place. Kali River drains into Arabian Sea at 14° 50′ 35.634″N & 74° 07′ 10.625″E to 14° 50′ 16.905″N & 74° 07′ 31.196″E, and has a width of around 800.... Journal of the Geological Society of India, Vol. 69, No. 6, pp. 1279-1284. IMD. 1999. Indian Meteorological Department, Government of India, Climatological Tables, 1951- 1980, pp. 387-388. Imhansoloeva T.M., Akintoye A.E., Mayowa I.P., Abdulkarim R...

Impact investigations of access channel modifications of Cochin harbour, India

Digital Repository Service at National Institute of Oceanography (India)

DineshKumar, P.K.

Though the modernization projects over the decades for harbour development also brought about several severe environmental modifications in Cochin harbour, along the west coast of India, so far, the physical processes involved are seldom...

Sediment transport along the Goa-north Karnataka Coast, western India

Digital Repository Service at National Institute of Oceanography (India)

Kunte, P.D.

Landsat images, aerial photographs, and topographic maps of the coast of Goa and of north Karnataka were interpreted to delineate sediment-transpoet sectors. Thirty six sediment-transpoet sectors were identified from landform indicators and patterns...

Quaternary phosphorites off the southeast coast of India

Digital Repository Service at National Institute of Oceanography (India)

Rao, V.P.; Michard, A.; Naqvi, S.W.A.; Boettcher, M.E.; Krishnaswamy, R.; Thamban, M.; Natarajan, R.; Borole, D.V.

National Institute of Oceanography, Dona Paula, 403 004, Goa, India b CEREGE, UniÕersity d’Aix Marseille III et CNRS, Fr 6094 et UMR 6536, Europole de l’Arbois, BP 80, 13545 Aix-en-ProÕenceCedex 4, France c Department of Biogeochemistry, Max... Callender and Bowser, 1980; Klinkhammer et al., 1982; Emerson et al., . 1983 . Lead, Zn, Sn and Mo generally associate with sulfide minerals in phosphorites. These elements are Ž below the detection limit in our phosphorites Table . 2 . X-ray diffraction...

White spot syndrome virus isolates of tiger shrimp Penaeus monodon (Fabricious) in India are similar to exotic isolates as revealed by polymerase chain reaction and electron microscopy.

Science.gov (United States)

Mishra, S S; Shekhar, M S

2005-07-01

Microbiological analysis of samples collected from cases of white spot disease outbreaks in cultured shrimp in different farms located in three regions along East Coast of India viz. Chidambram (Tamil Nadu), Nellore (Andhra Pradesh) and Balasore (Orissa), revealed presence of Vibrio alginolyticus, Vibrio parahaemolyticus, and Aeromonas spp. but experimental infection trials in Penaeus monodon with these isolates did not induce any acute mortality or formation of white spots on carapace. Infection trials using filtered tissue extracts by oral and injection method induced mortality in healthy P. monodon with all samples and 100% mortality was noted by the end of 7 day post-inoculation. Histopathological analysis demonstrated degenerated cells characterized by hypertrophied nuclei in gills, hepatopancreas and lymphoid organ with presence of intranuclear basophilic or eosino-basophilic bodies in tubular cells and intercellular spaces. Analysis of samples using 3 different primer sets as used by other for detection of white spot syndrome virus (WSSV) generated 643, 1447 and 520bp amplified DNA products in all samples except in one instance. Variable size virions with mean size in the range of 110 x 320 +/- 20 nm were observed under electron microscope. It could be concluded that the viral isolates in India involved with white spot syndrome in cultured shrimp are similar to RV-PJ and SEMBV in Japan, WSBV in Taiwan and WSSV in Malaysia, Indonesia, Thailand, China and Japan.

Limno-tolerant bacteria govern nitrate concentration in Mandovi estuary, India

Digital Repository Service at National Institute of Oceanography (India)

Divya, B.; Fernandes, S.O.; Sheelu, G.; Nair, S.; LokaBharathi, P.A.; Chandramohan, D.

The spatial and temporal abundances of limno-tolerant and halo-tolerant bacteria were investigated in the tide-dominated Mandovi estuary along the west coast of India. These investigations were carried out in relation to various environmental...

Coastal processes along north Kakinada Coast, Andhra Pradesh based on short-term study

Digital Repository Service at National Institute of Oceanography (India)

Raju, N.S.N.; AshokKumar, K.; Gowthaman, R.; SanilKumar, V.; Jayakumar, S.

Kakinada is situated in the central part of the Andhra Pradesh State on the east coast of India. To cater to recreational activities of the people in this coastal town, the Andhra Pradesh State Government has taken up an interactive to develop...

Environmental management and emergency preparedness plan for Tsunami disaster along Indian coast

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P Chandramohan

2017-12-01

Full Text Available The 26 December 2004 Tsunami generated by the submarine earthquake in Andaman Sea with the magnitude of 9.2 Richter scale triggered the worst destruction, widespread inundation and extensive damage in terms of life and property along the Tamil Nadu coast and Andaman Nicobar Group of Islands. The shoreline features like dunes, vegetation and steepness of beaches played vital role in attenuating the impact of Tsunami from destruction. While the low-level Marina beach experienced minimum inundation, the coast between Adyar and Cooum was inundated heavily. As the present generation of India was not aware of Tsunami, the emergency plan and preparedness were zero and so the loss of human life was huge. In this article, the authors describe the Tsunami occurred in India on 26 December 2004 and its impacts on morphology. The appropriate Emergency Preparedness plan and the Disaster Management Plan in case of reoccurrence of such natural disaster are discussed.

A maritime archaeological exploration along the Narmada estuary, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A.S.; Sundaresh

few antiquities of protohistoric period also found including a chart blade, a carnelian bead (Figure 5) and splinder wheel. The second period is identified as medieval period and majority of pottery is comprised of back ware and main shape.... Law, B.C. 1967. Historical Geography of Ancient India. Paris: Societe Asiatique De Paris. McCrindle, J.W. 1885. Ancient India as described by Ptolemy. New Delhi: Today and Tomorrow’s Printers and Pub. Rao, S.R. 1962-63. Excavation at Rangpur...

Mangrove sediment core analysis of foraminiferal assemblages - a study at two sites along the western coast of India

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P. Vidya

2014-02-01

Full Text Available Mangroves are an unique habitat and are largely influenced by sea level changes and wave energy. Foraminifera (Protista preserved in mangrove sediments provide an excellent proxy for deducing past conditions. One meter deep mangrove core samples at two sites on the western coast of India were collected. The foraminiferal assemblages at various depths showed significant changes in the abundance and diversity down the cores. A total of 59 species belonging to 32 genera, 24 families and five suborders were identified from the cores of these two sites. The cores showed an abundance of genus Rotalidium particularly the species Rotalidium annectans. Other species identified include Ammonia, Elphidium, Nonion, Spiroloculina, Quinqueloculina, Globigerinoides, etc. The pH, organic matter and CaCO3 also showed variations down the cores. There was a lack of correlation between sediment characteristics and the abundance of foraminifera in the cores. The low diversity and differences in distribution of foraminifera compared to surface intertidal samples may be due to intense post depositional changes or anthropogenic disturbances. The mangrove ecology thus appears disturbed by various factors.

Coastal erosion triggered by a shipwreck along the coast of Goa, India

Digital Repository Service at National Institute of Oceanography (India)

ManiMurali, R.; Babu, M.T.; Mascarenhas, A.; Choudhary, R.; Sudheesh, K.; Vethamony, P.

dunes and, as a consequence, has gradually become fragile due to severe erosion. Keywords: Coastal erosion, cyclone, remote sensing images, shipwreck. GOA is one of the most famous tourist coasts of the world. In general, the sea front of Goa... times due to the sudden boom of real estate sector, mushrooming of industries, inconsistent tourist flows, with a consequent impact on coastal ecosystems. Changes in the land-use/land-cover, geomorphology, ecology and sensitivity of coasts were...

Frequency distribution of foraminifera off Trivandrum, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Rao, K.K.; Kutty, M.K.; Panikkar, B.M.

Fifty two species belonging to 31 genera of recent foraminifera have been identified from sediment samples collected from the inshore waters. Based on relative abundance of species, it is observed that along the coast, the nearshore region up to 5 m...

Foreword [IJEGMBE 2015: India-Japan expert group meeting on biomolecular electronics and organic nanotechnology for environment preservation, Fukuoka (Japan), 23-26 December 2015

International Nuclear Information System (INIS)

2016-01-01

There is increased interest in organic nanotechnology and biomolecular electronics for environmental preservation, and in their anticipated impact on the economics of both the developing and the developed world. Keeping this in mind, the Department of Biological Functions, Graduate School of Life Sciences and Systems Engineering, Kyushu Institute of Technology (KIT), Kitakyushu, Japan, and the Department of Science and Technology Centre on Biomolecular Electronics (DSTCBE), National Physical Laboratory (NPL) jointly organized the India-Japan Workshop on Biomolecular Electronics and Organic Nanotechnology for Environmental Preservation (IJWBME 2009) at NPL, New Delhi from 17 th - 19 th December 2009, IJWBME 2011 at EGRET Himeji, Himeji, from 7 th - 10 th December, Japan, and IJWBME 2013 at Delhi Technological University, New Delhi, from 13 th - 15 th December. The India-Japan Expert Group Meeting on Biomolecular Electronics and Organic Nanotechnology for Environment Preservation (IJEGMBE) will be held from 22 th – 25 th , December, 2015, at Nakamura Centenary Memorial Hall, Kyushu Institute of Technology, Kitakyushu, Japan in association with Delhi Technological University, Delhi, India. Recent years have seen rapid growth in the area of Biomolecular Electronics involving the association and expertise of physicists, biologists, chemists, electronics engineers and information technologists. There is increasing interest in the development of nanotechnology and biomolecular electronic devices for the preservation of our precious environment. In this context, the world of the electronics, which developed on Si semiconductors, is going to change drastically. A paradigm shift towards organic or printed electronics is more likely in the future. The field of organic electronics promises exciting new technologies based on inexpensive and mechanically flexible electronic devices, and is now starting to see commercial success. On the sidelines of this increasingly well

Primary sand-dune plant community and soil properties during the west-coast India monsoon

Directory of Open Access Journals (Sweden)

Willis A.

2016-06-01

Full Text Available A seven-station interrupted belt transect was established that followed a previously observed plant zonation pattern across an aggrading primary coastal dune system in the dry tropical region of west-coast India. The dominant weather pattern is monsoon from June to November, followed by hot and dry winter months when rainfall is scarce. Physical and chemical soil characteristics in each of the stations were analysed on five separate occasions, the first before the onset of monsoon, three during and the last post-monsoon. The plant community pattern was confirmed by quadrat survey. A pH gradient decreased with distance from the shoreline. Nutrient concentrations were deficient, increasing only in small amounts until the furthest station inland. At that location, there was a distinct and abrupt pedological transition zone from psammite to humic soils. There was a significant increase over previous stations in mean organic matter, ammonium nitrate and soil-water retention, although the increase in real terms was small. ANOVA showed significant variation in electrical conductivity, phosphorus, calcium, magnesium and sodium concentrations over time. There was no relationship between soil chemistry characteristics and plant community structure over the transect. Ipomoea pes-caprae and Spinifex littoreus were restricted to the foredunes, the leguminous forb Alysicarpus vaginalis and Perotis indica to the two stations furthest from the strand. Ischaemum indicum, a C4 perennial grass species adopting an ephemeral strategy was, in contrast, ubiquitous to all stations.

Some studies on wave refraction in relation to beach erosion along the Kerala coast

Digital Repository Service at National Institute of Oceanography (India)

Das, P.K.; Hariharan, V.; Varadachari, V.V.R.

Using the British admirality bathymetric charts off the west coast of India and employing the graphical method of constructing wave refraction diagrams, an attempt is made to study behaviour of the short-period waves (4, 5 and 6 seconds) which...

Environmental magnetic and petroleum hydrocarbons records in sediment cores from the north east coast of Tamilnadu, Bay of Bengal, India.

Science.gov (United States)

Venkatachalapathy, R; Veerasingam, S; Basavaiah, N; Ramkumar, T; Deenadayalan, K

2011-04-01

In this study, mineral magnetic properties and petroleum hydrocarbons were statistically analysed in four sediment cores (C1, A1, T1 and K1) from the north east coast of Tamilnadu, India to examine the feasibility of PHC concentrations assessment using magnetic susceptibility. The C1 and A1 cores reveal a clear horizon of increase in PHC above 35 and 50 cm respectively suggesting the excess anthropogenic loading occurred in the recent past. Magnetic properties which were enhanced in the upper part of the sediment cores were the result of ferrimagnetic minerals from anthropogenic sources. Factor analysis confirmed that the input of magnetic minerals and petroleum hydrocarbons in Chennai coastal sediments are derived from the same sources. The present study shows that instead of expensive and destructive PHC chemical methods, magnetic susceptibility is found to be a suitable, cheap and rapid method for detailed study of petroleum hydrocarbon contamination in marine sediments. Copyright © 2011 Elsevier Ltd. All rights reserved.

Directional wave measurements off Navinal, Gulf of Kachchh, India

Digital Repository Service at National Institute of Oceanography (India)

Vethamony, P.; KrishnaKumar, V.; Suryanarayana, A.; Antony, M.K.; Swamy, G.N.

.54 m respectively. Though large wave heights of the order of 3 to 4m exist elsewhere along the west coast of India during these seasons, Navinal seems to be a less wave active zone because of its geographical location. Maximum wave energy is centred...

Fine particle deposition at Vainguinim tourist beach, Goa, India

Digital Repository Service at National Institute of Oceanography (India)

Chandramohan, P.; Jayakumar, S.; SanilKumar, V.; Ilangovan, D.

Vainguinim Beach is a small and narrow pocket beach located on the rocky coast of Dona Paula Bay, at the estuarine front of the Zuari River in Goa, India. The beach has been widely used for recreation and swimming by a large number of tourists...

Wave transformation at select locations along the Indian coast through measurements, modelling and remote sensing

Digital Repository Service at National Institute of Oceanography (India)

Aboobacker, V.M.

difficult than a single wave system. Generation and propagation of the multi-directional swells in the Arabian Sea, especially during pre-monsoon and NE monsoon seasons, their interaction with local wind seas along the west coast of India...

Ground water pollution due to aquaculture in east coast region of ...

African Journals Online (AJOL)

Abstract. Ground water quality parameters were studied for pollution due to aquaculture in the east coast region of district Andhrapradesh, India. Over a period of two years, 46 groundwater samples were collected for analyses. The results showed that the alkalinity ranged from 120 - 482 mg/L, and pH ranged from 7.1 to 8.6.

Linkage between speciation of Cd in mangrove sediment and its bioaccumulation in total soft tissue of oyster from the west coast of India.

Science.gov (United States)

Chakraborty, Parthasarathi; Ramteke, Darwin; Gadi, Subhadra Devi; Bardhan, Pratirupa

2016-05-15

This study established a mechanistic linkage between Cd speciation and bioavailability in mangrove system from the west coast of India. High bioaccumulation of Cd was found in the oyster (Crassostrea sp.) even at low Cd loading in the bottom sediment. Bioaccumulation of Cd in the oyster gradually increased with the increasing concentrations of water soluble, exchangeable and carbonate/bicarbonate forms of Cd in the sediments. Fe/Mn oxyhydroxide phase was found to control Cd bioavailability in the sediment system. Cd-associated with sedimentary organic matter was bioavailable and organic ligands in the sediments were poor chelating agents for Cd. This study suggests that bioaccumulation of Cd in oyster (Crassostrea sp.) depends not on the total Cd concentration but on the speciation of Cd in the system. Copyright © 2015 Elsevier Ltd. All rights reserved.

Distribution of dissolved carbohydrates and uronic acids in a tropical estuary, India

Digital Repository Service at National Institute of Oceanography (India)

Khodse, V.B.; Bhosle, N.B.; Matondkar, S.G.P.

, concentrations of total dissolved carbohydrate (TCHO), dissolved polysaccharide (PCHO), dissolved monosaccharide (MCHO), and dissolved uronic acid (URA) were measured in the Mandovi estuary, west coast of India during the monsoon and premonsoon seasons...

Prevalence of human pathogenic enteric viruses in bivalve molluscan shellfish and cultured shrimp in south west coast of India.

Science.gov (United States)

Umesha, Kanasinakatte R; Bhavani, Naniah C; Venugopal, Moleyur N; Karunasagar, Indrani; Krohne, Georg; Karunasagar, Iddya

2008-03-20

The prevalence of human enteric viruses in bivalve molluscan shellfish and shrimp collected off the south west coast of India was studied to assess the extent of fecal pollution of coastal environment. Out of 194 samples analyzed, 37% of oyster, 46% of clam and 15% of shrimp samples were positive for enteroviruses (EV). Adenoviruses (ADV) were detected in 17% of oyster and 27% of clam samples. However, other enteric viruses such as noroviruses (NoV) and hepatitis A virus (HAV) were not detected in any of the samples. High prevalence of EV and ADV was noticed between May to December. Thirty four percent of oyster and 49% of clam samples showed fecal coliform values higher than the limit. MS-2 phage was detected in 57% of oyster and 73% of clam samples. The presence of MS-2 phage and human enteric viruses showed association while fecal coliforms and enteric viruses showed no association. However, 17 samples, which were positive for enteric viruses (EV and ADV), were negative for MS-2 phage.

Seasonal oxygen deficiency over the western continental shelf of India

Digital Repository Service at National Institute of Oceanography (India)

Naqvi, S.W.A.; Naik, H.; Jayakumar, D.A.; Shailaja, M.S.; Narvekar, P.V.

, and their impact on biology and chemistry off the west coast of India are described here. The O2 deficiency in this region, associated with the seasonal (southwest monsoon) upwelling, seems to have intensified in recent years, presumably in response to enhanced...

Trace elements in near-shore sediments along the east and west coasts of India

Digital Repository Service at National Institute of Oceanography (India)

Paropkari, A.L.; Shirodkar, P.V.; Alagarsamy, R.; Kaisary, S.; Mesquita, A.

the riverine mouths. The analyses showed significant differences in the concentrations of Cu, Zn, Ni, Fe, Mn, Al and TOC between the east and west coasts. Their average bulk concentrations along the east coast are: Cu (59.6 ppm), Zn (103.45 ppm), Ni (115.5 ppm...

DNA damage in marine rock oyster (Saccostrea Cucullata) exposed to environmentally available PAHs and heavy metals along the Arabian Sea coast.

Science.gov (United States)

Sarker, Subhodeep; Vashistha, Deepti; Saha Sarker, Munmun; Sarkar, A

2018-04-30

Molecular biomarkers are used world wide for quick assessment of the immediate effect of environmental pollution on marine ecosystems. Recently, we evaluated oxidative stress responses of marine rock oyster, Saccostrea cucullata impacted due to polycyclic aromatic hydrocarbons (PAHs) accumulated in their tissues at a few sampling sites along the coast of Goa around the region of the Arabian sea coast, India (Sarkar et al., 2017). Using a combination of partial alkaline unwinding and comet assays, we now report a comprehensive study on the impairment of DNA integrity (DI) in S. cucullata due to exposure to environmentally available PAHs and also heavy metals (Pb, Cd, Cu, Fe and Mn) along the Arabian Sea coast, Goa, India exclusively around the entire coast of Goa. First, we determined significant correlation between DI in S. cucullata and the extent of exposure to and bioaccumulation of different PAH compounds including 2-3 aromatic ring PAHs (R 2 , 0.95), 4-6 aromatic ring PAHs (R 2 , 0.85), oxygenated-PAHs (oxy-PAHs, R 2 , 0.84) and total PAHs (t-PAHs, R 2 , 0.98). Second, we observed dose-dependent decrease in DI in S. cucullata with increasing concentrations of different PAH components in oyster tissues. We substantiated our field observations with appropriate laboratory controls using benzo[a]pyrene (BaP). Third, we performed stepwise multiple regression analyses of different water quality parameters including pH, salinity, temperature, dissolved oxygen (DO), biochemical oxygen demand (BOD), nitrite (NO 2 ), nitrate (NO 3 ), phosphate (PO 4 ), turbidity and also t-PAH-biota, t-PAH-water with DI as the dependent variable. Among all these parameters, only four parameters such as t-PAH-biota in combination with DO, BOD and NO 2 showed significant correlation (R¯ 2 = 0.95) with loss in DI in S. cucullata. Based on these results, we created a map indicating the percentage of DNA damage in S. cucullata exposed to PAHs and heavy metals at each sampling location along

Wave power potential at a few shallow-water locations around Indian coast

Digital Repository Service at National Institute of Oceanography (India)

SanilKumar, V.; Dubhashi, K.K.; Nair, T.M.B.; Singh, J.

less with maximum value of 31.8 kW m sup(-1). The average wave power during the summer monsoon is high (15.5-19.3 kW m sup(-1)) along the west coast of India. The study shows that the annual average wave power (1.8-7.6 kW m sup(-1)) along the locations...

Building and Managing Electronic Resources in Digital Era in India with Special Reference to IUCAA and NIV, Pune: A Comparative Case Study

Science.gov (United States)

Sahu, H. K.; Singh, S. N.

2015-04-01

This paper discusses and presents a comparative case study of two libraries in Pune, India, Inter-University Centre for Astronomy and Astrophysics and Information Centre and Library of National Institute of Virology (Indian Council of Medical Research). It compares how both libraries have managed their e-resource collections, including acquisitions, subscriptions, and consortia arrangements, while also developing a collection of their own resources, including pre-prints and publications, video lectures, and other materials in an institutional repository. This study illustrates how difficult it is to manage electronic resources in a developing country like India, even though electronic resources are used more than print resources. Electronic resource management can be daunting, but with a systematic approach, various problems can be solved, and use of the materials will be enhanced.

Elemental concentration and potential ecological risk assessment of reef associated surface sediments of Appa Island, Gulf of Mannar Biosphere Reserve, Southeast coast of India.

Science.gov (United States)

Saravanan, P; Krishnakumar, S; Silva, Judith D; Pradhap, D; Vidyasakar, A; Radhakrishnan, K; Godson, Prince S; Arumugam, K; Magesh, N S

2018-03-01

Thirty three surface sediments were collected for the present study to assess the elemental concentration and its associated ecological risk in the reef associated surface sediments, Appa Island, Gulf of Mannar Biosphere Reserve, South east coast of India. The distribution of calcium carbonate in the reef sediments is controlled by coral debris and shell fragments whereas the Organic matter (OM) content are chiefly derived from mangroves and sea grasses. The circulation of trace elements and Fe, Mn are controlled by the fluvial process and re-suspended sediments. The concentration of Pb was primarily controlled by migration of pollutants through long shore sediment transport process. The main source of Pb in the study area is from coal incinerating power plants and coal handling operations from harbors. Copyright © 2018 Elsevier Ltd. All rights reserved.

Ancient anchorage systems in India with reference to the Gujarat coast

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A; Sundaresh; Tripati, S.

The Indian coast, with a long history of maritime activities, has been dotted with several ancient ports. The evidence for this exists in port-related structures on the shore and in relics lying in the sea adjacent. Marine archaeological...

Zooplankton from the shelf watrs off the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Nair, V.R.; Peter, G.

Zooplankton in the shelf waters of India from Dabhol to Tuticorin was studied during the 17th cruise of R.V. Gaveshani in March 1977. Biomass values were relatively high in the central zone between Mangalore and Alleppey. In the region between...

Coastal circulation and upwelling index along the east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Suryanarayana, A.; Rao, D.P.

500 db surface as a reference level. The dynamic topography charts show strong southwesterly flow with a large cyclonic cell during NE monsoon whereas during SW monsoon show a complicated pattern with cyclonic and anti-cyclonic cells along the coast...

Numerical modeling of tide-induced currents in Thane Creek, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Naidu, V.S.; Sarma, R.V.

stream_size 15842 stream_content_type text/plain stream_name J_Waterway_Port_Coast_Ocean_Eng_127_241.pdf.txt stream_source_info J_Waterway_Port_Coast_Ocean_Eng_127_241.pdf.txt Content-Encoding UTF-8 Content-Type text... request must be filed with the ASCE Manager The manuscript for this technical note was submitted for possible publication on March 8, 2000; revised December 12, technical note is part of the Journal of Waterway, Port, Ocean Engineering, Vol. 127, No. 4...

A mid-Holocene strandline deposit on the inner shelf of Cochin, West coast of India

Digital Repository Service at National Institute of Oceanography (India)

Reddy, N.P; Rao, N.V.N.D

stream_size 7 stream_content_type text/plain stream_name J_Geol_Soc_India_39_205.pdf.txt stream_source_info J_Geol_Soc_India_39_205.pdf.txt Content-Encoding ISO-8859-1 Content-Type text/plain; charset=ISO-8859-1 ...

Environmental pollution of electronic waste recycling in India: A critical review

International Nuclear Information System (INIS)

Awasthi, Abhishek Kumar; Zeng, Xianlai; Li, Jinhui

2016-01-01

The rapid growth of the production of electrical and electronic products has meant an equally rapid growth in the amount of electronic waste (e-waste), much of which is illegally imported to India, for disposal presenting a serious environmental challenge. The environmental impact during e-waste recycling was investigated and metal as well as other pollutants [e.g. polybrominated diphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs)] were found in excessive levels in soil, water and other habitats. The most e-waste is dealt with as general or crudely often by open burning, acid baths, with recovery of only a few materials of value. As resulted of these process; dioxins, furans, and heavy metals are released and harmful to the surrounding environment, engaged workers, and also residents inhabiting near the sites. The informal e-waste sectors are growing rapidly in the developing countries over than in the developed countries because of cheapest labor cost and week legislations systems. It has been confirmed that contaminates are moving through the food chain via root plant translocation system, to the human body thereby threatening human health. We have suggested some possible solution toward in which plants and microbes combine to remediate highly contaminated sites. - Highlights: • It systematically reviewed Environmental deterioration through e-waste recycling in India. • We found heavy metals (Cu, Pb, Cd and Cr) potentially serious concern at recycling site. • The heavy metals can entered human body through the direct and indirect exposure. • Regular monitoring required to examine the possibility of risk through e-waste mismanagement. • Further phytoremedial approach can be use as one of the possible solution for contaminated soil and improve the land quality. - The e-waste recycling sites are highly contaminated with heavy metals as well as other pollutants (e.g. PBDEs, PCBs) in excessive levels.

Morphometry and cell volumes of diatoms from a tropical estuary of India

Digital Repository Service at National Institute of Oceanography (India)

RaviKumar, M.S.; Ramaiah, N.; Tang, D.

Cell volumes and per cell carbon contents of different diatoms (10 centric, 14 pennate and 1 dinoflagellate) collected from Dona Paula Bay in the central west coast of India have been analyzed. Morphometric information on the phytoplankton types...

A glimpse of the Quaternary monsoon history from India and adjoining seas

Digital Repository Service at National Institute of Oceanography (India)

Saraswat, R.; Nigam, R.; Correge, T.

/plain; charset=UTF-8 1    Author version: Palaeogeogr. Palaeoclimatol. Palaeoecol., vol.397; 2014; 1-6 A glimpse of the Quaternary monsoon history from India and adjoining seas Rajeev Saraswat1, Rajiv Nigam1, Thierry Correge2 1 National... and radionuclide (210Pb) analyses to understand past environmental changes from the sediment cores collected from mudflat regions of central west coast of India. A significant shift in sediment characteristics is observed post 1980, probably in response...

Humpback Dolphins (Genus Sousa) in India: An Overview of Status and Conservation Issues.

Science.gov (United States)

Sutaria, Dipani; Panicker, Divya; Jog, Ketki; Sule, Mihir; Muralidharan, Rahul; Bopardikar, Isha

2015-01-01

This chapter aims to collate recent work done by different research teams along the Indian coast and presents research plans for the conservation and management of the genus Sousa in Indian waters. Humpback dolphins are the most common nearshore cetaceans found along the Indian coast. The taxonomy is confused, but two or more species of humpback dolphins may be present in India. Dedicated research on humpback dolphins and other cetaceans has been initiated only in the past few years and vast gaps in the ecology and conservation of the genus from the region remain. Dedicated and opportunistic research indicates that humpback dolphin presence is continuous along the west coast of India, owing to the contiguous favourable habitat of shallow nearshore waters, while along the east coast humpback dolphins are apparently found in pockets. Humpback dolphins are also the most numerous in incidental catch records from the coast, owing to the large overlap in space use with nearshore fisheries like small gillnets, trawls, shore seines and purse seines. Along many coastal sites, humpback dolphins are known to cause damage and depredation of fish catch of certain fishing gears, making them unpopular. At the same time, many fishers along the west coast have developed local dolphin-watching programmes as an alternate source of livelihood, providing positive impetus for conservation. However, research on the long-term effects of dolphin watching and its management is required. Some recommendations for more effective management of this species are made. © 2015 Elsevier Ltd All rights reserved.

Pollution impact on chaetognaths of the Visakhapatnam Harbour and neritic waters, east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Rathod, V; Bhat, K.L.; Sudhakar, U.; Sarma; Parulekar, A.H.

stream_size 6 stream_content_type text/plain stream_name J_Mar_Biol_Assoc_India_37_185.pdf.txt stream_source_info J_Mar_Biol_Assoc_India_37_185.pdf.txt Content-Encoding ISO-8859-1 Content-Type text/plain; charset=ISO-8859-1 ...

Discriminating the biophysical impacts of coastal upwelling and mud banks along the southwest coast of India

Science.gov (United States)

Karnan, C.; Jyothibabu, R.; Arunpandi, N.; Jagadeesan, L.; Muraleedharan, K. R.; Pratihari, A. K.; Balachandran, K. K.; Naqvi, S. W. A.

2017-08-01

Coastal upwelling and mud banks are two oceanographic processes concurrently operating along certain stretches of the southwest (Kerala) coast of India during the Southwest Monsoon period (June-September), facilitating significant enhancement in plankton biomass. Mud banks have scientific and societal attention from time immemorial, predominantly due to the large fisheries associated with them. In this paper, for the first time, the specific biophysical roles of these oceanographic processes have been discriminated, based on a focused 18 weekly/fortnightly time-series study (April to September 2014) in a mud bank-upwelling area (off Alappuzha, southwest coast of India). In conjunction with standard hydrographical and satellite remote sensing data, we utilised a FlowCAM to track the biophysical linkage in terms of plankton composition abundance and size structure at three locations (M1, M2 and M3) in the study area. During the Pre-Southwest Monsoon (April-May), the entire study area was warmer with low nitrate concentration in the surface waters, which caused lower biomass of autotrophs compared to the Southwest Monsoon (June-September). By the onset of the Southwest Monsoon (June), drastic hydrographical transformations took place in the study domain due to the Coastal upwelling, reflected as the surfacing of significantly cool, high nutrient and hypoxic waters. Concurrently, mud bank formed at location M2 due to the presence of relatively high-suspended sediments in the region, creating a localised calm environment conducive for fishing activities. In response to the hydrographical transformations in the entire study area during the Southwest Monsoon, the autotrophic plankton biomass and size structure experienced significant change. The micro-autotrophs biomass that was low during the Pre-Southwest Monsoon (av. 0.33 ± 0.2 mgC L- 1 at surface and av. 0.07 ± 0.04 mgC L- 1 at subsurface) noticeably increased during the Southwest Monsoon (av. 1.6 ± 0.4 mgC L- 1 at

Environmental radiation and potential ecological risk levels in the intertidal zone of southern region of Tamil Nadu coast (HBRAs), India.

Science.gov (United States)

Punniyakotti, J; Ponnusamy, V

2018-02-01

Natural radioactivity content and heavy metal concentration in the intertidal zone sand samples from the southern region of Tamil Nadu coast, India, have been analyzed using gamma ray spectrometer and ICP-OES, respectively. From gamma spectral analysis, the average radioactivity contents of 238 U, 232 Th, and 40 K in the intertidal zone sand samples are 12.13±4.21, 59.03±4.26, and 197.03±26.24Bq/kg, respectively. The average radioactivity content of 232 Th alone is higher than the world average value. From the heavy metal analysis, the average Cd, Cr, Cu, Ni, Pb, and Zn concentrations are 3.1, 80.24, 82.84, 23.66, 91.67, and 137.07ppm, respectively. The average Cr and Ni concentrations are lower, whereas other four metal (Cd, Cu, Pb, and Zn) concentrations are higher than world surface rock average values. From pollution assessment parameter values, the pollution level is "uncontaminated to moderately contaminated" in the study area. Copyright © 2017 Elsevier Ltd. All rights reserved.

Near-inertial currents off the east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Mukherjee, A.; Shankar, D.; Aparna, S.G.; Amol, P.; Fernando, V.; Fernandes, R.; Khalap, S.T.; Satlekar, N.P.; Agarvadekar, Y.; Gaonkar, M.G.; Tari, A.P.; Kankonkar, A.; Vernekar, S.

.8◦N for the M2 tide (Haren, 2005; Alford et al., 2007) and 14.52◦N and 13.44◦N for the K1 andO1 tides, respectively (Xie et al, 2009; sun et al., 2011; Xie et al, 2011). The critical latitude for the semi-diurnal tide is north of the basin boundary... the southwest monsoon. Continental Shelf Research 11, 1397–1408. Sindhu, M. 2012. Numerical Modeling of Tides and Storm Surges in the Bay of Bengal. Ph.D. Thesis. Goa University, India. Sun, Lu., Maas., Zheng, Quanan., Wang, Dongxiao., Hu, Jianyu., Tai, Chang...

Electronic health record use in an affluent region in India: Findings from a survey of Chandigarh hospitals.

Science.gov (United States)

Powell, Adam C; Ludhar, Jasmine K; Ostrovsky, Yuri

2017-07-01

To characterize the electronic health record (EHR) systems in use in an affluent region of India in order to understand the state-of-the-art within the Indian market. A survey on EHR features was created by combining an instrument developed by the Organisation for International Cooperation and Development and an instrument developed by an American team of researchers. An interviewer directly administered the survey to leaders from hospitals in greater Chandigarh which possessed electronic health information systems. Summary statistics from the survey are reported. 24 hospitals offering multi-specialty inpatient care were identified in greater Chandigarh. 18 of these hospitals had electronic health information systems, 17 of which were interviewed. Of the hospitals with systems, 17 (100%) could access patient demographic information internally, but 12 (71%) could not access vital sign, allergy, or immunization data internally. 11 (65%) of the systems were capable of sharing patient summaries internally, but 13 (76%) could not send electronic referrals internally. Among organizations which have adopted systems, major barriers tend to have been around financial and staff matters. Concerns over interoperability, privacy, and security were infrequently cited as barriers to adoption. EHRs are ubiquitous in at least one region of India. Systems are more likely to have capabilities for intra-organizational information sharing than for inter-organizational information sharing. The availability of EHR data may foster clinical research. Copyright © 2017 Elsevier B.V. All rights reserved.

Ocean coast effect on magnetotelluric data: a case study from Kachchh, India

Science.gov (United States)

Pandey, Dhananjai; Sinha, Martin; MacGregor, Lucy; Singh, Satish

2008-09-01

The effects of the ocean coast on magnetotelluric (MT) data have been studied and results are described in this article. MT soundings from various sites along coastal plains of Kachchh were acquired where volcanic rocks overlie Mesozoic sediments having potential resource prospects. The region of our study lies in the proximity of Gulf of Kachchh and Arabian Sea. This article describes the effects the presence of a conductive body on the acquired MT data. With the help of synthetic MT modelling and induction arrows we demonstrate the influence of shallow conductive body on the MT data. The modelling results when compared to the field observations show that much of the high frequencies are unaffected by the coast, however low frequencies of the data do seem to be distorted by onshore offshore resistivity contrasts. The least affect on high frequencies can be attributed to very shallow water depth as well as to the fact that the onshore offshore resistivity contrasts are not large enough to influence the high frequency data badly. The results presented here report for the first time the effect of the coast on the analysis on MT data from Kachchh. Due to several academic as well as industrial onshore offshore MT experiments presently being carried out to explore its hydrocarbon potential, our results have an important bearing on designing and acquisition of future MT surveys in this region.

Assessment of health safety from ingestion of natural radionuclides in seafoods from a tropical coast, India

International Nuclear Information System (INIS)

Feroz Khan, M.; Godwin Wesley, S.

2011-01-01

Research highlights: → Baseline levels of 210 Po and 210 Pb in seafoods of Kudankulam Nuclear Plant, India. → The study is performed due to lack of radioactivity data in this pristine environment. → Daily activity intake, effective dose and carcinogenic risk estimated. → This data would help in future assessment after the power plant attains criticality. - Abstract: The activities of 210 Po and 210 Pb were determined in commonly consumed seafoods to evaluate the internal exposure and risk to humans residing Kudankulam coast where a mega nuclear power plant is under construction. The concentration of 210 Po in seafoods ranged from 1.2 ± 0.7 to 248 ± 8.1 Bq kg -1 . Meanwhile, 210 Pb ranged between 1.1 ± 0.05 and 14.8 ± 1.6 Bq kg -1 . The committed effective dose (CED) due to 210 Po and 210 Pb varied from 11.04 to 515.6 and 3.93 to 23.5 μSv yr -1 , respectively. The lifetime cancer risk for the public due to 210 Po was in the range of 3.47 x 10 -5 -1.62 x 10 -3 and it was 4.03 x 10 -5 -1.96 x 10 -4 due to 210 Pb. The activity intake, effective dose and cancer risk was found lesser than international guidelines and the seafood intake was considered to be safe for human consumption.

A comparison of electronic waste recycling in Switzerland and in India

International Nuclear Information System (INIS)

Sinha-Khetriwal, Deepali; Kraeuchi, Philipp; Schwaninger, Markus

2005-01-01

Electronic waste, commonly known as e-waste, is comprised of discarded computers, television sets, microwave ovens and other such appliances that are past their useful lives. As managing e-waste becomes a priority, countries are being forced to develop new models for the collection and environmentally sound disposal of this waste. Switzerland is one of the very few countries with over a decade of experience in managing e-waste. India, on the other hand, is only now experiencing the problems that e-waste poses. The paper aims to give the reader insight into the disposal of end-of-life appliances in both countries, including appliance collection and the financing of recycling systems as well as the social and environmental aspects of the current practices

Hydrodynamic modeling along the southern tip of India: A special emphasis on Kanyakumari coast

Directory of Open Access Journals (Sweden)

K. Gurumoorthi

2017-12-01

Full Text Available Hydrodynamic models are important to many coastal engineering designs and application, especially addressing sediment and water quality. In this study, MIKE 21 two-dimensional (2D hydrodynamic model based on the flexible mesh (FM technique was used to simulate the surface currents forced by tides and winds in Kanyakumari coast. The model results of the tidal level along shore and cross shore currents are agreed well with measured data in Kanyakumari coast. The major components of tides and currents are analyzed by harmonic analysis methods. Root mean square error (RMSE values for the measured and model tides (0.017 m and 0.079 m and currents (0.025 m/s and 0.009 m/s during the northeast (NE and southwest (SW monsoon period are calculated. A series of scenario runs for NE and SW monsoon season are used to understand the regional circulation. The model result shows that the Kanyakumari coast is dominated by tides and surface currents flow, which are influenced by the seasonal reversal wind pattern. Flows around this coastal water have been evidenced small scale cyclonic and anti-cyclonic eddies ranged from ∼55 to 120 km in diameter. The cyclonic and anti-cyclonic eddies are mostly appeared in near Kanyakumari and SE coast of Kerala due to local/ remotely generated forces.

Gas-hydrate-bearing sand reservoir systems in the offshore of India: Results of the India National Gas Hydrate Program Expedition 02

Science.gov (United States)

Kumar, P.; Collett, Timothy S.; Vishwanath, K.; Shukla, K.M.; Nagalingam, J.; Lall, M.V.; Yamada, Y; Schultheiss, P.; Holland, M.

2016-01-01

The India National Gas Hydrate Program Expedition 02 (NGHP-02) was conducted from 3-March-2015 to 28-July-2015 off the eastern coast of India using the deepwater drilling vessel Chikyu. The primary goal of this expedition was to explore for highly saturated gas hydrate occurrences in sand reservoirs that would become targets for future production tests. The first two months of the expedition were dedicated to logging-whiledrilling (LWD) operations, with a total of 25 holes drilled and logged. The next three months were dedicated to coring operations at 10 of the most promising sites. With a total of five months of continuous field operations, the expedition was the most comprehensive dedicated gas hydrate investigation ever undertaken.

Inundation mapping – a study based on December 2004 Tsunami Hazard along Chennai coast, Southeast India

Directory of Open Access Journals (Sweden)

C. Satheesh Kumar

2008-07-01

Full Text Available Tsunami impact study has been undertaken along Chennai coast starting from Pulicat to Kovalam. The study area Chennai coast is mainly devoted to prepare large scale action plan maps on tsunami inundation incorporating land use details derived from satellite data along with cadastral data using a GIS tool. Under tsunami inundation mapping along Chennai coast an integrated approach was adopted to prepare thematic maps on land use/land cover and coastal geomorphology using multispectral remote sensing data. The RTK dGPS instruments are used to collect elevation contour data at 0.5 m intervals for the Chennai coast. The GIS tool has been used to incorporate the elevation data, tsunami inundation markings obtained immediately after tsunami and thematic maps derived from remote sensing data. The outcome of this study provides an important clue on variations in tsunami inundation along Chennai coast, which is mainly controlled by local geomorphologic set-up, coastal zone elevation including coastal erosion protection measures and near shore bathymetry. This study highlights the information regarding most vulnerable areas of tsunami and also provides indication to demarcate suitable sites for rehabilitation.

Trace metal concentration in some marine algae of the Maharashtra coast (India)

Digital Repository Service at National Institute of Oceanography (India)

Agadi, V.V.; Bhosle, N.B.; Untawale, A.G.

74 marine algal species representing Chlorophyta, Phaeophyta and Rhodophyta from ten different stations along the Maharashtra Coast were analysed for the concentration of Mn, Fe, Co, Ni, Cu, Zn and Pb Concentration varies with species and also from...

Marine magnetic anomalies off the southwest coast of India and their analysis

Digital Repository Service at National Institute of Oceanography (India)

Rao, D.G.; Bhattacharya, G.C.

Total magnetic intensity and bathymetric surveys were carried out in the offshore area of Ratnagiri on the western continental shelf of India and an isomagnetic anomalies map at a contour interval of 50 nT was prepared which reveals N-S trends...

Determination of net shroe drift direction of central west coast of India using remotely sensed data

Digital Repository Service at National Institute of Oceanography (India)

Kunte, P.D; Wagle, B.G.

stream_size 12 stream_content_type text/plain stream_name J_Coast_Res_9_811.pdf.txt stream_source_info J_Coast_Res_9_811.pdf.txt Content-Encoding ISO-8859-1 Content-Type text/plain; charset=ISO-8859-1 ...

Monsoon-induced temporal changes in beach morphology and associated sediment dynamics, central east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Chauhan, O.S.

stream_size 12 stream_content_type text/plain stream_name J_Coast_Res_11_776.pdf.txt stream_source_info J_Coast_Res_11_776.pdf.txt Content-Encoding ISO-8859-1 Content-Type text/plain; charset=ISO-8859-1 ...

A study on reflection pattern of swells from the shoreline of peninsular India

Digital Repository Service at National Institute of Oceanography (India)

Anoop, T.R.; SanilKumar, V.; Johnson, G.

and tidal current on the reflected waves were examined. For the locations off the west coast of India, seasons have large impact on the reflection coefficient and were relatively less during the monsoon season due to the increase in incident wave energy...

Littoral transport studies along west coast of India - A reivew

Digital Repository Service at National Institute of Oceanography (India)

Kunte, P.D.; Wagle, B.G.; Sugimori, Y.

an important role in deciding the areas of coastal erosion and accretion, in shaping and orienting coastal landforms and finally in the evolution of the coast. Hence, in the analysis of coastal erosion-accretion problem, for the development of harbour... and construction of coastal structures, the direction, amount and behaviour of long-term average shore drift is of vital importance. Littoral transport is defined as the movement of sediments in the near shore zone by waves and currents. Littoral transport...

Unusual congregation of salps off Veraval and Bombay, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Lodh, N.M.; Gajbhiye, S.N.; Nair, V.R.

During September to October swarming of salps occur along the coasts off Veraval and Bombay. These congregations off Veraval are contributed by the single species Pegea confoederata recording an unusual biomass as high as 7.3 ml.m-3. Off Bombay...

Godavari rift and its extension towards the east coast of India

Science.gov (United States)

Mishra, D. C.; Gupta, S. B.; Venkatarayudu, M.

1989-09-01

is similar to that of the Lower Deccan Trap (65 m.y.) which suggests the presence of basic intrusions of this period in this region with basement tectonics having Gondwana trends and superimposed almost perpendicular structural features. The latter might be a part of more regional tectonics affecting the entire east coast of India from the Mahanadi basin in the north to east of the Cuddapah and Cauvery basins in the south.

Coastal processes along the shorefront of Chilka Lake, east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Chandramohan, P.; SanilKumar, V.; Nayak, B.U.

Chilka Lake (Orissa, India) inlet mouth is exposed to high annual littoral drift of about 1 x 10 super(6) m super(3). The inlet mouth was observed to migrate about 500 m northward during the period of one year study. Measurement on daily longshore...

Monitoring of impact of anthropogenic inputs on water quality of mangrove ecosystem of Uran, Navi Mumbai, west coast of India.

Science.gov (United States)

Pawar, Prabhakar R

2013-10-15

Surface water samples were collected from substations along Sheva creek and Dharamtar creek mangrove ecosystems of Uran (Raigad), Navi Mumbai, west coast of India. Water samples were collected fortnightly from April 2009 to March 2011 during spring low and high tides and were analyzed for pH, Temperature, Turbidity, Total solids (TS), Total dissolved solids (TDS), Total suspended solids (TSS), Dissolved oxygen (DO), Biochemical oxygen demand (BOD), Carbon dioxide (CO2), Chemical oxygen demand (COD), Salinity, Orthophosphate (O-PO4), Nitrite-nitrogen (NO2-N), Nitrate-nitrogen (NO3-N), and Silicates. Variables like pH, turbidity, TDS, salinity, DO, and BOD show seasonal variations. Higher content of O-PO4, NO3-N, and silicates is recorded due to discharge of domestic wastes and sewage, effluents from industries, oil tanking depots and also from maritime activities of Jawaharlal Nehru Port Trust (JNPT), hectic activities of Container Freight Stations (CFS), and other port wastes. This study reveals that water quality from mangrove ecosystems of Uran is deteriorating due to industrial pollution and that mangrove from Uran is facing the threat due to anthropogenic stress. Copyright © 2013 Elsevier Ltd. All rights reserved.

Decadal shoreline assessment using remote sensing along the central Odisha coast, India

Digital Repository Service at National Institute of Oceanography (India)

ManiMurali, R.; Dhiman, R.; Choudhary, R.; Jayakumar, S.; Ilangovan, D.; Vethamony, P.

sensing data (Landsat and IRS P6) were used in the study. Digital shoreline analysis system discovered the eroded and accreted parts of the study area. Gahirmatha and coast above Devi River experienced heavy erosion during 2000–2012 compared with 1990...

Marine archaeological explorations on the southwestern coast of Saurashtra, India

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A.S.; Tripati, S.

, International journal of Nautical Archaeology 35 (1). 117-127 Gaur, A.S. and Sundaresh 2005. A Late Harappan port at Kindar Kheda, Man and Environment 30 (2): 44-48 McCrindle, J.W 1885. Ancient India as Described by Ptolemy (R.C. Jain ed.). New Delhi. Merh, S... stream_size 19091 stream_content_type text/plain stream_name J_I.O_Archaeol_3_81.pdf.txt stream_source_info J_I.O_Archaeol_3_81.pdf.txt Content-Encoding ISO-8859-1 Content-Type text/plain; charset=ISO-8859-1 Marine...

Ships on hero stones from the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Tripati, S.

tossed their cargo in the waves of the sea in times of danger and promised their Gods to make a donation if ever He brought them safely out of this peril. The Buddhist goddess ?Tara? is the protectress and a number of ?Tara? images have been found... of Naval Warfare in India Boats were not only engaged for transportation of cargo, crossing rivers and lakes pleasure trips for noble people but also for naval warfare. This practice also appears to be very old. The art of employing boats and ships...

Mineral magnetism of atmospheric dust over southwest coast of India: Impact of anthropogenic activities and implications to public health

Science.gov (United States)

Warrier, Anish Kumar; Shankar, R.; Manjunatha, B. R.; Harshavardhana, B. G.

2014-03-01

We have used rock magnetic techniques in this study to assess atmospheric pollution at five stations in and around Mangalore city on the southwestern coast of India. Samples of dust were collected from two suburban areas (Thokkottu and Pumpwell located respectively ~ 10 km and 3 km from the city center), the city center itself (Milagres) and industrial/port areas (Panambur and Mangalore Refinery and Petrochemicals Limited (MRPL)). Low-frequency magnetic susceptibility (χlf), frequency-dependent susceptibility (χfd), susceptibility of anhysteretic remanent magnetization (χARM) and isothermal remanent magnetization (IRM 20 to 1000 mT) were determined on 23 dust samples and inter-parametric ratios calculated. Results show that samples from suburban areas (particularly Thokkottu) are characterized by low χlf (Company Limited (KIOCL) at Panambur and its storage and export through the nearby New Mangalore Port. However, the dust sample from MRPL has magnetically "soft" minerals like magnetite. This magnetic mineral may have originated from petroleum refining processes at MRPL. Particulate pollution from industrial activities and motor vehicle exhaust is a threat to human health and is known to cause cardiovascular and respiratory ailments. Therefore, the pollution levels brought out by this study warrant a comprehensive epidemiological study in the area of study.

SEASONAL ASSESSMENT OF HYDROGRAPHIC VARIABLES AND PHYTOPLANKTON COMMUNITY IN THE ARABIAN SEA WATERS OF KERALA, SOUTHWEST COAST OF INDIA

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Sushanth Vishwanath Rai

2014-12-01

Full Text Available The seasonal variation of the hydrographic variables and phytoplankton species in the Arabian Sea waters of the Kerala coast, Southern India was investigated during different seasons. The variables such as pH, temperature, salinity, turbidity and chlorophyll-a contents of water were found to be high during pre-monsoon season and the dissolved oxygen content was minimal. The concentration of nutrients viz., nitrate, phosphate, silicate varied independently. In the study a total of 53 species of phytoplankton were recorded. Their density was higher during the post-monsoon season than during other seasons and the diatoms were found to be the dominant species. The major phytoplankton in terms of frequency and abundance were the species namely, Biddulphia mobiliensis, Chaetoceros curvisetus, Licmophora abbreviata, Skeletonema costatum, Prorocentrum micans and Oscillatoria sp. They showed significant positive correlation with pH, temperature, salinity, nitrate, phosphate and chlorophyll-a contents, whereas turbidity, dissolved oxygen and silicate exhibited significant negative correlation. The Principal Component Analysis (PCA developed two principal components with 84.74% of total variability in the water quality which separated pre- and post-monsoon periods from the monsoon season on axis I, and pre-monsoon and monsoon periods from post-monsoon on axis II.

Teak (Tectona grandis L.f.): A preferred timber for shipbuilding in India as evidenced from shipwrecks

Digital Repository Service at National Institute of Oceanography (India)

Tripati, S.; Shukla, S.R.; Shashikala, S.; Sardar, A.A.

, India was pirated by Captain Kidd, and subsequently wrecked off the southeast coast of the Dominican Republic in 1699. Indiana University, USA, carried out exploration to locate Cara Merchant. This communication presents a comparative study...

India Emerging

International Development Research Centre (IDRC) Digital Library (Canada)

2017-12-13

Dec 13, 2017 ... It is telling that in a famous paper authored by the Nobel Prize winner, Robert ..... Examples are the steam engine, railroad, electricity, electronics, the ...... According to Gartner's Senior Research Analyst 'India's domestic IT services .... in new areas such as engineering services and product development.

Spatial and temporal variations of wave energy in the nearshore waters of the central west coast of India

Science.gov (United States)

Amrutha, M. M.; Sanil Kumar, V.

2016-12-01

Assessment of wave power potential at different water depths and time is required for identifying a wave power plant location. This study examines the variation in wave power off the central west coast of India at water depths of 30, 9 and 5 m based on waverider buoy measured wave data. The study shows a significant reduction ( ˜ 10 to 27 %) in wave power at 9 m water depth compared to 30 m and the wave power available at 5 m water depth is 20 to 23 % less than that at 9 m. At 9 m depth, the seasonal mean value of the wave power varied from 1.6 kW m-1 in the post-monsoon period (ONDJ) to 15.2 kW m-1 in the Indian summer monsoon (JJAS) period. During the Indian summer monsoon period, the variation of wave power in a day is up to 32 kW m-1. At 9 m water depth, the mean annual wave power is 6 kW m-1 and interannual variations up to 19.3 % are observed during 2009-2014. High wave energy ( > 20 kW m-1) at the study area is essentially from the directional sector 245-270° and also 75 % of the total annual wave energy is from this narrow directional sector, which is advantageous while aligning the wave energy converter.

Bioactive potential of some economically important marine gastropods along the Gulf of Mannar region, southeast coast of India

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JayanthiGovindarajalu

2016-08-01

Full Text Available Objective: To analyse the economically important gastropods for prospective antimicrobial, antioxidant and cytotoxic activities from the Gulf of Mannar region, southeast coast of India. Methods: The bioactive potential of some gastropods i.e. Babylonia spirata (B. spirata, Phalium glaucum, Tonna dolium, Hemifusus pugilinus, Xancus pyrum, Chicoreus ramosus (C. ramosus, Harpa articularis, Ficus ficus and Babylonia zeylanica were analysed. Antimicrobial activity was carried out against 8 human pathogenic bacteria and 3 fungal strains by well diffusion method. Antioxidant and cytotoxic activities were analyzed by standard methods. Results: In antibacterial and antifungal activities, methanolic extract of B. spirata significantly showed the highest inhibition zone against Aeromonas hydrophila and Fusarium spp. (P > 0.05. In the total antioxidant activity, the maximum activity was observed in B. spirata (510 µg/mg and in the 1.1-diphenyl-2-picrylhydrazyl scavenging activity, B. spirata showed the highest percentage of inhibition (76.7%. In the case of cytotoxicity i.e. brine shrimp lethality tests the methanolic extract of C. ramosus showed the lowest percentage of mortality and the LC50 values were found to be 523.9 µg/mL. Conclusions: The results revealed that all the gastropods in the present study possessed antimicrobial, antioxidant and cytotoxic effects. However, species like B. spirata and C. ramosus exhibited potent activity and can be used for further clinical studies.

An evaluation of flora from coastal sand dunes of India: Rationale for conservation and management

Digital Repository Service at National Institute of Oceanography (India)

Rodrigues, R.S.; Mascarenhas, A.; Jagtap, T.G.

stream_size 37100 stream_content_type text/plain stream_name Ocean_Coast_Manage_54_181a.pdf.txt stream_source_info Ocean_Coast_Manage_54_181a.pdf.txt Content-Encoding UTF-8 Content-Type text/plain; charset=UTF-8 1... Author version: Ocean & Coastal Management, vol.54(2); 2011; 181-188 An evaluation of flora from coastal sand dunes of India: Rationale for conservation and management Rouchelle S. Rodrigues, Antonio Mascarenhas, Tanaji G. Jagtap * National...

Electronic Commerce and Electronic Business

Indian Academy of Sciences (India)

R. Narasimhan (Krishtel eMaging) 1461 1996 Oct 15 13:05:22

This special issue is motivated by the recent upsurge of research activity in the areas of electronic commerce and electronic business both in India and all over the world. The current ... Monte Carlo methods for pricing financial options are then.

Western Continental Margin of India - Re-look using potential field data

Science.gov (United States)

Rajaram, M.; S P, A.

2008-05-01

The Western Continental Margin of India (WCMI) evolved as a result of rifting between India and Madagascar that took place during mid Cretaceous (~88Ma).The WCMI is equally important in terms of natural resources as well as research point of view. The major tectonic elements in the western offshore includes the Laxmi and Chagos- Laccadive ridge dividing the WCMI and the adjoining Arabian sea into two basins, Pratap Ridge, Alleppey platform etc. Different theories have been proposed for the evolution of each of these tectonic elements. In the current paper we look at geopotential data on the west coast of India and the western off-shore. The data sets utilized include Satellite derived High Resolution Free Air Gravity data over the off-shore, Bouguer data onland, Champ Satellite Magnetic data, published Marine Magnetic data collected by ONGC, NIO, ground magnetic data over west cost collected by IIG and available aeromagnetic data. From the free air gravity anomaly the structural details of the western offshore can be delineated. The Euler depths of FAG depict deep solutions associated with Pratap Ridge, Comorin Ridge, the west coast fault and the Laxmi Ridge. These may be associated with continental margin and continental fragments. From the aeromagnetic and marine magnetic data it is evident that the West Coast Fault is dissected at several places. The shallow circular feature associated with Bombay High is evident both on the FAG and the analytic signal derived from satellite Magnetic data. The crustal magnetic thickness from MF5 lithospheric model of the Champ appears to suggest that the continental crust extends up to the Chagos- Laccadive ridge. Based on the analysis of these geopotential data sets the various theories for the evolution of the WCMI will be evaluated and these results will be presented.

Sea level changes along the Indian coast: Observations and projections

Digital Repository Service at National Institute of Oceanography (India)

Unnikrishnan, A.S.; Kumar, K.R.; Fernandes, S.E.; Michael, G.S.; Patwardhan, S.K.

: CLIMATE CHANGE AND INDIA CURRE NT SCIENCE, VOL. 90, NO. 3, 10 FEBRUARY 2006 *For correspondence. (e - mail: unni@darya.nio.org ) Sea level changes along the Indian coast: Observ a tions and projections A. S. Unnikrishnan 1, *, K. Rupa Kumar... with the occu r rence of tropical cyclones in the Bay of Bengal and associated storm surges in a future climate scenario. Projections for the future are needed for decision making by planners and policy makers. Future pr o jecti ons are made for different...

Modeling of sediment transport along Mangalore coast using mike 21

Digital Repository Service at National Institute of Oceanography (India)

Babu, K.S.; Dwarakish, G.S.; Jayakumar, S.

in the coastal system. However, large gaps remain in our knowledge of sediment transport processes, and a continuing need exists for the development of reliable, well- validated, practical modeling systems. To this end the coastal processes ofManga10re Coast..., Thiruvananthapuram, India, Vol. 1,578-585. [3] Danish Hydraulic Institute (2000), "MIKE 21 User Guide and manual". [4] Davies A.G., Van Rijn L.e., Damgaard I.S., Van de Graff 1. and Ribberink I.S. (2002), "Intercomparison of Research and Practical Sand Transport...

Hindcast of breaking waves and its impact at an island sheltered coast, Karwar

Science.gov (United States)

Dora, G. Udhaba; Kumar, V. Sanil

2018-01-01

Variability in the characteristics of depth-induced wave breakers along a non-uniform coastal topography and its impact on the morpho-sedimentary processes is examined at the island sheltered wave-dominated micro-tidal coast, Karwar, west coast of India. Waves are simulated using the coupled wind wave model, SWAN nested in WAVEWATCH III, forced by the reanalysis winds from different sources (NCEP/NCAR, ECMWF, and NCEP/CFSR). Impact of the wave breakers is evaluated through mean longshore current and sediment transport for various wave energy conditions across different coastal morphology. Study revealed that the NCEP/CFSR wind is comparatively reasonable in simulation of nearshore waves using the SWAN model nested by 2D wave spectra generated from WAVEWATCH III. The Galvin formula for estimating mean longshore current using the crest wave period and the Kamphuis approximation for longshore sediment transport is observed realistically at the sheltered coastal environment while the coast interacts with spilling and plunging breakers.

Eighteenth annual West Coast theoretical chemistry conference

Energy Technology Data Exchange (ETDEWEB)

NONE

1997-05-01

Abstracts are presented from the eighteenth annual west coast theoretical chemistry conference. Topics include molecular simulations; quasiclassical simulations of reactions; photodissociation reactions; molecular dynamics;interface studies; electronic structure; and semiclassical methods of reactive systems.

NATURAL RADIOACTIVITY LEVEL AND ELEMENTAL COMPOSITION OF SOIL SAMPLES FROM A HIGH BACKGROUND RADIATION AREA ON EASTERN COAST OF INDIA (ODISHA).

Science.gov (United States)

Sahoo, S K; Kierepko, R; Sorimachi, A; Omori, Y; Ishikawa, T; Tokonami, S; Prasad, G; Gusain, G S; Ramola, R C

2016-10-01

A comprehensive study was carried out to determine the radioactivity concentration of soil samples from different sites of a high background radiation area in the eastern coast of India, Odisha state. The dose rate measured in situ varied from 0.25 to 1.2 µSv h -1 The gamma spectrometry measurements indicated Th series elements as the main contributors to the enhanced level of radiation and allowed the authors to find the mean level of the activity concentration (±SD) for 226 Ra, 228 Th and 40 K as 130±97, 1110±890 and 360±140 Bq kg -1 , respectively. Human exposure from radionuclides occurring outdoor was estimated based on the effective dose rate, which ranged from 0.14±0.02 to 2.15±0.26 mSv and was higher than the UNSCEAR annual worldwide average value 0.07 mSv. Additionally, X-ray fluorescence analysis provided information about the content of major elements in samples and indicated the significant amount of Ti (7.4±4.9 %) in soils. © The Author 2016. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

The biggest stone anchors (Indo-Arab type) from Mithi Virdi, Bhavnagar, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A.S.; Sundaresh; Kumar, B.

of Oceanography, Goa on the Saurashtra coast have been undertaken at Dwarka (Gaur et al. 2000), Bet Dwarka (Sundaresh et al. 2002) and Somnath {Gaur et al. 2002). The prospections *National Institute of Oceanography, Dona Paula, Goa **Devli, Talaza, Bhavnagar... of stone anchors at Dwarka, Bet Dwarka, Aramda (Gaur et al. 2003), Somnath (Gaur ef al. 2002), Vijayadurg (Sila ef al. 1998), Sindhudurg (Sila and Gaur 1997), Goa waters (Sila et al. 2003) and Tamilnadu coast (Athiyaman 2001). These anchors...

Environmental pollution of electronic waste recycling in India: A critical review.

Science.gov (United States)

Awasthi, Abhishek Kumar; Zeng, Xianlai; Li, Jinhui

2016-04-01

The rapid growth of the production of electrical and electronic products has meant an equally rapid growth in the amount of electronic waste (e-waste), much of which is illegally imported to India, for disposal presenting a serious environmental challenge. The environmental impact during e-waste recycling was investigated and metal as well as other pollutants [e.g. polybrominated diphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs)] were found in excessive levels in soil, water and other habitats. The most e-waste is dealt with as general or crudely often by open burning, acid baths, with recovery of only a few materials of value. As resulted of these process; dioxins, furans, and heavy metals are released and harmful to the surrounding environment, engaged workers, and also residents inhabiting near the sites. The informal e-waste sectors are growing rapidly in the developing countries over than in the developed countries because of cheapest labor cost and week legislations systems. It has been confirmed that contaminates are moving through the food chain via root plant translocation system, to the human body thereby threatening human health. We have suggested some possible solution toward in which plants and microbes combine to remediate highly contaminated sites. Copyright © 2015 Elsevier Ltd. All rights reserved.

Ancient technology of jetties and anchoring points along the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A; Vora, K.H.

The Indian coast, with a long history of maritime activities, has been dotted with several ancient ports. The evidence for this exists in port-related structures on the shore and in relics lying in the sea adjacent. Marine archaeological...

Mixing and flushing time scales in the Azhikode Estuary, southwest coast of India

Digital Repository Service at National Institute of Oceanography (India)

Revichandran, C.; Pylee, A.

Flushing time scales of the Azhikode Estuary, Kerala, India showed pronounced dry season and wet season signals as well as large inter-annual variation. Cumulative flushing time of the estuary varies from 4.8 tide cycles in April to 1.22 tide cycles...

Modelling of tidal hydrodynamics for a tropical ecosystem with implications for pollutant dispersion (Cochin Estuary, Southwest India)

Digital Repository Service at National Institute of Oceanography (India)

Balachandran, K.K.; Reddy, G.S.; Revichandran, C.; Srinivas, K.; Vijayan, P.R.; Thottam, T.J.

Tidal circulation in the Cochin Estuary, a moderately polluted estuary along the southwest coast of India, was studied using a 2D hydrodynamic model. The predicted tides and currents showed very good agreement with measured tides. Particle...

Analysis of phytoplankton composition from southern Malabar Coast during the 2005 monsoon as a follow-up of September 2004 stench event

Digital Repository Service at National Institute of Oceanography (India)

Ramaiah, N.; Catul, V.; Kurian, S.; Rodrigues, V.; Paul, J.T.; Fernandes, V.; Imtiaz, C.A.

inter- site variations, though not as pronounced as in the case of Pb and Zn. An industrial site in Delhi 1 reported a high concentra- tion (1000 μg/g) of Ni. However, our re- sults are comparable with those of a rural traffic location (105 μg... University, Tezpur 784 028, India 2 Northeast Regional Institute of Water and Land Management, Tezpur 784 027, India *For correspondence. e-mail: rrh@tezu.ernet.in Analysis of phytoplankton composition from southern Malabar Coast during...

Environmental changes associated with monsoon induced upwelling, off central west coast of India

Digital Repository Service at National Institute of Oceanography (India)

DeSousa, S.N.; Sawkar, K.; Rao, P.V.S.S.D.P.

in response to prevailing equatorward winds. High salinity ocean waters of rich nutrient contents were observed at the coast in some locations. However, the effect of upwelling on the surface distribution of properties was reduced to some extent due to coastal...

Emergency preparedness in the case of Makran tsunami: a case study on tsunami risk visualization for the western parts of Gujarat, India

Directory of Open Access Journals (Sweden)

V. M. Patel

2016-03-01

Full Text Available The west coast of India is affected by tsunamigenic earthquake along the Makran subduction zone. On 28 November 1945 at 21:56 coordinated universal time (UTC, a massive Makran earthquake (M8.0 generated a destructive tsunami that propagated across the Northern Arabian Sea and the Indian Ocean. This tsunamigenic earthquake was responsible for the loss of life and great destruction along the coasts of India, Pakistan, Iran and Oman. Modelling of tsunami stages has been made for the coasts of Pakistan, Iran, India and Oman using NAMI-DANCE computer code. The fault parameters of the earthquakes for the generation of tsunami are epicentre (25.15° N, 63.48° E, fault area (200 km length and 100 km width, angle of strike, dip and rake (246°, 7° and 90°, focal depth (15 km, slip magnitude (7 m. The bathymetry data are taken from General Bathymetric Chart of the Oceans (GEBCO and land topography data were collected using Shuttle Radar Topography Mission (SRTM. The present simulation is carried out for a duration of 360 min. It is observed that the maximum calculated tsunami run-ups were about 0.7–1.1 m along the coast of Oman, 0.5 m near Muscat, 0.1 m near Sur, 0.7–1.35 m along the western coast of India, 0.5–2.3 m along the southern coast of Iran and 1.2–5.8 m along the southern coast of Pakistan. After the tsunamigenic earthquake, the tsunami wave reached the Gulf of Kachchh in about 240 min, Okha in about 185 min, Dwarka in about 150 min, Porbandar in about 155 min, Mumbai in about 300 min and Goa in about 210 min. The calculated 2-hr tsunami travel time to the Indian coast is in good agreement with the available reports and published data. If the tsunami strikes during high tide, we should expect more serious hazards which would impact local coastal communities. The results obtained in this study are converted to be compatible with the geographic information system based applications for display and spatial analysis of

Analytical Study of Usage of Electronic Information Resources at Pharmacopoeial Libraries in India

Directory of Open Access Journals (Sweden)

Sunil Tyagi

2014-02-01

Full Text Available The objective of this study is to know the rate and purpose of the use of e-resource by the scientists at pharmacopoeial libraries in India. Among other things, this study examined the preferences of the scientists toward printed books and journals, electronic information resources, and pattern of using e-resources. Non-probability sampling specially accidental and purposive technique was applied in the collection of primary data through administration of user questionnaire. The sample respondents chosen for the study consists of principle scientific officer, senior scientific officer, scientific officer, and scientific assistant of different division of the laboratories, namely, research and development, pharmaceutical chemistry, pharmacovigilance, pharmacology, pharmacogonosy, and microbiology. The findings of the study reveal the personal experiences and perceptions they have had on practice and research activity using e-resource. The major findings indicate that of the total anticipated participants, 78% indicated that they perceived the ability to use computer for electronic information resources. The data analysis shows that all the scientists belonging to the pharmacopoeial libraries used electronic information resources to address issues relating to drug indexes and compendia, monographs, drugs obtained through online databases, e-journals, and the Internet sources—especially polices by regulatory agencies, contacts, drug promotional literature, and standards.

'Shamal' swells in the Arabian Sea and their influence along the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Aboobacker, V.M.; Vethamony, P.; Rashmi, R.

on the meteorological and oceanographic conditions of the Arabian Sea, and this has not been studied so far. Rapid changes in wind patterns during these shamal events can alter the wave characteristics of the Arabian Sea. This has motivated us to take up the present... generated in the Gulf of Oman and the east coast of Oman propagate in the NW direction. Another swell system formed off Salalah coast (Figure 4a) propagates in the NNW direction. Since the present study aims at understanding the influence of shamal swells...

Mapping of coastal landforms and volumetric change analysis in the south west coast of Kanyakumari, South India using remote sensing and GIS techniques

Directory of Open Access Journals (Sweden)

S. Kaliraj

2017-12-01

Full Text Available The coastal landforms along the south west coast of Kanyakumari have undergone remarkable change in terms of shape and disposition due to both natural and anthropogenic interference. An attempt is made here to map the coastal landforms along the coast using remote sensing and GIS techniques. Spatial data sources, such as, topographical map published by Survey of India, Landsat ETM+ (30 m image, IKONOS image (0.82 m, SRTM and ASTER DEM datasets have been comprehensively analyzed for extracting coastal landforms. Change detection methods, such as, (i topographical change detection, (ii cross-shore profile analysis, (iii Geomorphic Change Detection (GCD using DEM of Difference (DoD were adopted for assessment of volumetric changes of coastal landforms for the period between 2000 and 2011. The GCD analysis uses ASTER and SRTM DEM datasets by resampling them into common scale (pixel size using pixel-by-pixel based Wavelet Transform and Pan-Sharpening techniques in ERDAS Imagine software. Volumetric changes of coastal landforms were validated with data derived from GPS-based field survey. Coastal landform units were mapped based on process of their evolution such as beach landforms including sandy beach, cusp, berm, scarp, beach terrace, upland, rockyshore, cliffs, wave-cut notches and wave-cut platforms; and the fluvial landforms. Comprising of alluvial plain, flood plains, and other shallow marshes in estuaries. The topographical change analysis reveals that the beach landforms have reduced their elevation ranging from 1 to 3 m probably due to sediment removal or flattening. Analysis of cross-shore profiles for twelve locations indicate varying degrees of loss or gain of coastal landforms. For example, the K3-K3′ profile across the Kovalam coast has shown significant erosion (−0.26 to −0.76 m of the sandy beaches resulting in the formation of beach cusps and beach scarps within a distance of 300 m from the shoreline. The volumetric change

Southwest monsoon influences the water quality and waste assimilative capacity in the Mandovi estuary (Goa state, India)

Digital Repository Service at National Institute of Oceanography (India)

VishnuRadhan, R.; Sagayadoss, J.; Seelan, E.; Vethamony, P.; Shirodkar, P.V.; Zainudin, Z.; Shirodkar, S.

The monsoon-dominated Mandovi estuary is located in Goa state – a global tourist destination along the centralwest coast of India. In addition to factor analyses of water quality data, the water quality index (WQI), trophic state index (TSI...

Corrosion and microfouling of copper and its alloys in a tropical marine waters of India (Mangalore)

Digital Repository Service at National Institute of Oceanography (India)

Sawant, S.S.; Khandeparker, D.C.; Tulaskar, A.; Venkat, K.; Garg, A.

Rate of corrosion, extent and nature of microfouling of copper, cupronickel 70/30 and cupronickel 90/10 have been studied for three different seasons at a station on the west coast of India. The corrosion rates for all the three materials are higher...

Evidence for Indo-Roman trade from Bet Dwarka waters, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A.S.; Sundaresh; Tripati, S.

India had a very active maritime trade contact with the Roman world between the 4th century BC and the 4th century AD. In this context recent finds of stone anchors, potsherds, lead anchors and a lead ingot from 5 to 8 m water-depth near Bet Dwarka...

Biological indicators in relation to coastal pollution along Karnataka coast, India

Digital Repository Service at National Institute of Oceanography (India)

Verlecar, X.N.; Desai, S.R.; Sarkar, A.; Dalal, S.G.

pollutants in relation to planktonic and benthic organisms were examined at two locations along Karnataka coast, one at Kulai (740 47.74? E and 120 55.16? N) receiving huge amount of industrial effluents from fertilizer, petroleum and chemical plants along... with t 0 45? E and 130 10? N) is located 20 kms away, which is a typically agricultural and fishing village having no stress of industrial discharges. Although the concentrations of dissolved oxygen (DO), nutrients and trace metals in water and sediment...

A new species of portunid crab of the genus Charybdis (De Haan, 1833) (Crustacea: Decapoda: Brachyura) from Goa, India

Digital Repository Service at National Institute of Oceanography (India)

Padate, V.P.; Rivonker, C; Anil, A.C; Sawant, S.S.; Venkat, K.

A new species of portunid crab, Charybdis (Charybdis) goaensis sp. nov. is described from Goa, west coast of India. It differs from its closest congener, Charybdis (Charybdis) philippinensis in possessing bluntly triangular median frontal teeth...

Environmental and radiological aspects of thorium processing in India

International Nuclear Information System (INIS)

Rudran, Kamala; Paul, A.C.; Pillai, P.M.B.; Saha, S.C.; Vidyasagar, D.; Sawant, Pramilla D.

1997-01-01

India has an active programme for using thorium as third stage self- sustaining nuclear fuel. A significant amount of thorium is also used in the gas mantle industry. The presently estimated monazite deposits amounting to five million tonnes are distributed in the beach sands of south western and eastern coasts and some areas in Andhra Pradesh. The sands are processed for recovery of rare earth minerals and thorium. The mineral processing and thorium separation involves hazards to workers from exposure to radiation, radioactive and silica bearing dusts as well as from conventional chemicals used in the processing. Releases of wastes from the plants may necessitate environmental surveillance. The present paper reviews the hazards envisaged, steps taken to mitigate such hazards and achievements in this regard in the thorium industry in India. (author)

Heavy metal pollution exerts reduction/adaptation in the diversity and enzyme expression profile of heterotrophic bacteria in Cochin estuary, India

Digital Repository Service at National Institute of Oceanography (India)

Jose, J.; Giridhar, R.; Anas, A; LokaBharathi, P.A; Nair, S.

Over the past three decades heavy metal pollution has increased substantially in Cochin estuary, south west coast of India. The distribution, diversity and enzyme expression profile of culturable microbial population along a pollution gradient...

All India Seminar on Biomedical Engineering 2012

CERN Document Server

Bhatele, Mukta

2013-01-01

This book is a collection of articles presented by researchers and practitioners, including engineers, biologists, health professionals and informatics/computer scientists, interested in both theoretical advances and applications of information systems, artificial intelligence, signal processing, electronics and other engineering tools in areas related to biology and medicine in the All India Seminar on Biomedical Engineering 2012 (AISOBE 2012), organized by The Institution of Engineers (India), Jabalpur Local Centre, Jabalpur, India during November 3-4, 2012. The content of the book is useful to doctors, engineers, researchers and academicians as well as industry professionals.

Cytogenetic studies on newborns from high level natural background radiation areas of Kerala coast, South India

International Nuclear Information System (INIS)

Cherian, V.D.; Kurien, C.J.; Das, Birajalaxmi

1997-01-01

The human population residing in the monazite bearing high level natural background radiation (HLNBR) areas of Kerala, along the South-West coast of India provides unique opportunities of assessing directly in man, the health effects of chronic low-level radiation exposure. The per capita dose received by this population is nearly four times the normal background radiation level. While this is the average dose, the radiation levels prevailing in these HLNBR areas are in the range of 1 to over 35 mGy per year. Chromosomal aberration studies in the lymphocytes of newborns and adults from these areas have been in progress for two decades. So far, 4156 newborn babies from HLNBR and 7321 from normal background radiation (NBR) areas have been screened for the incidence of chromosomal aberrations (dicentrics and rings). The mean frequency of dicentrics and rings did not show any significant difference between the newborns in the control and the HLNBRA population. Assessment of the frequency of micronuclei in cytochalasin-B blocked binucleated lymphocytes of 49 newborns from control areas and 131 newborns from radioactive areas also showed similar values. While an age-dependent increase in chromosome aberration frequency was observed in the adult samples from control and the study areas, the regression analysis of the data indicated a marginally higher slope for the samples from HLNBRA. Karyotype anomalies recorded so far among the newborns have not revealed any significant difference in the incidence of numerical (including Down syndrome) and structural alterations between the control and the exposed populations. A noteworthy observation, herein reported for the first time from any HLNBR area is that there is no discernible increase in the incidence of micronuclei and chromosomal aberrations in the peripheral lymphocytes of newborn babies hailing from HLNBR areas, where their ancestral generations have lived for several hundreds of years. (author)

Use and User Perception of Electronic Information Resources: A Case Study of Siva Institute of Frontier Technology, India

Directory of Open Access Journals (Sweden)

Velmurugan Chandran

2013-12-01

Full Text Available The present study aims to explore the use and user perception of electronic resources in Siva Institute of Frontier Technology, India. A total number of 123 users were taken into account for the study through a questionnaire-based survey method. A well-structured questionnaire was designed and distributed to the selected 200 students and staff members. 123 copies of the questionnaires were returned dully filled in and the overall response rate was 61.50 percent. The questionnaire contained both open- and close-ended questions. The collected data were classified, analyzed, and tabulated by using simple statistical methods. This study covers the impact of electronic resources on students and faculty in their academic pursuit.

Distribution of total phosphorus in the shelf sediments off the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Murty, P.S.N.; Reddy, C.V.G.; Varadachari, V.V.R.

The total phosphorus content in the sediment samples collected from different stations on the continental shelf along five sections normal to the coast near Bombay, Karwar, Mangalore, Cochin and Alleppey has been determined and the distribution...

Wave-induced nearshore circulation along the Calangute-Candolim beach, Goa, West coast of India

Digital Repository Service at National Institute of Oceanography (India)

Krishnakumar, V.; Murty, C.S.; Heblekar, A.K.

The wave-induced nearshore circulation model suggested by Noda has been modified and applied for three small segments along the coast of Goa. The present model incorporates the prevailing bottom topography and considers its variation along...

Upwelling and associated hydrography along the west coast of india during southwest monsoon, 1999

Digital Repository Service at National Institute of Oceanography (India)

Maheswaran, P.A.; Rajesh, G.; Revichandran, C.; Nair, K.K.C.

) and 1.2 degrees C (off Mangalore) from the farthest stations, indicating the presence of upwelled water near the coast. Well defined thermal, saline and density fronts were visible. Relatively high offshore transport was observed off Kanyakumari...

An Indo-Arabian type of stone anchor from Kannur, Kerala,west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Tripati, S.; Manikfan, A.; Mohamed, M.

A great deal of new evidence relating to maritime archaeology of India has come to lime light in the recent years, both from explorations and excavations. Among them the ancient stone anchors are the key to understand history of maritime trade...

Sea and swell along west coast of India: Study based on measured data

Digital Repository Service at National Institute of Oceanography (India)

SanilKumar, V.; AshokKumar, K.; Pednekar, P.; Gowthaman, R.

Conference on Harbour and Ocean Engineering 12-14, Dec. 2007, at NITK, Surathkal 736 SEA AND SWELL...@nio.org pprem@nio.org rgowtham@nio.org Ocean Engineering Division National Institute of Oceanography Dona Paula, Goa 403 004 India ABSTRACT Separation of sea and swell from the measured data is important for studying the wind wave dynamics...

Miscellaneous and Electronic Loads Energy Efficiency Opportunities for Commercial Buildings: A Collaborative Study by the United States and India

Energy Technology Data Exchange (ETDEWEB)

Ghatikar, Girish [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Cheung, Iris [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Lanzisera, Steven [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Wardell, Bob [Infosys Technologies Limited; Deshpande, Manoj [Infosys Technologies Limited; Ugarkar, Jayraj [Infosys Technologies Limited

2013-04-01

This report documents the technical evaluation of a collaborative research, development, and demonstration (RD&D) project that aims to address energy efficiency of Miscellaneous and Electronic Loads (MELs) (referred to as plug loads interchangeably in this report) using load monitoring and control devices. The goal s of this project are to identify and provide energy efficiency and building technologies to exemplary information technology (IT) office buildings, and to assist in transforming markets via technical assistance and engagement of Indian and U.S. stakeholders. This report describes the results of technology evaluation and United States – India collaboration between the Lawrence Berkeley National Laboratory (LBNL), Infosys Technologies Limited (India), and Smartenit, Inc. (U.S.) to address plug - load efficiency. The conclusions and recommendations focus on the larger benefits of such technologies and their impacts on both U.S. and Indian stakeholders.

Spatial and temporal variations of wave energy in the nearshore waters of the central west coast of India

Directory of Open Access Journals (Sweden)

M. M. Amrutha

2016-12-01

Full Text Available Assessment of wave power potential at different water depths and time is required for identifying a wave power plant location. This study examines the variation in wave power off the central west coast of India at water depths of 30, 9 and 5 m based on waverider buoy measured wave data. The study shows a significant reduction ( ∼  10 to 27 % in wave power at 9 m water depth compared to 30 m and the wave power available at 5 m water depth is 20 to 23 % less than that at 9 m. At 9 m depth, the seasonal mean value of the wave power varied from 1.6 kW m−1 in the post-monsoon period (ONDJ to 15.2 kW m−1 in the Indian summer monsoon (JJAS period. During the Indian summer monsoon period, the variation of wave power in a day is up to 32 kW m−1. At 9 m water depth, the mean annual wave power is 6 kW m−1 and interannual variations up to 19.3 % are observed during 2009–2014. High wave energy ( >  20 kW m−1 at the study area is essentially from the directional sector 245–270° and also 75 % of the total annual wave energy is from this narrow directional sector, which is advantageous while aligning the wave energy converter.

Distribution and enrichment of 210Po and 210Pb in the environment of Mangalore, South West coast of India

International Nuclear Information System (INIS)

Prakash, V.; Rajashekara, K.M.; Narayana, Y.

2013-01-01

The paper deals with the distribution and enrichment of 210 Po and 210 Pb in soil samples of Mangalore South west coast of India. The soil samples collected from the region were analyzed for 210 Po and 210 Pb activity using radiochemical analytical techniques to understand the distribution and enrichment of those radionuclides. The 210 Po activity in soil in the environment of Mangalore varies from 1.5 Bq kg -1 to 26.9 Bq kg -1 with a mean value of 12.6 Bq kg -1 and that of 210 Pb varies in the range 7.6 Bq kg -1 to 67.5 Bq kg -1 with a mean value of 38.9 Bq kg -1 . The mean 210 Po/ 210 Pb ratio observed was 0.3 and it shows that the radionuclides 210 Po and 210 Pb are not in equilibrium and the accumulation of 210 Pb in soil is more compared to 210 Po. A good correlation exists between the activities of 210 Po and 210 Pb with correlation coefficient r = 0.7. The absorbed gamma dose in the environment of the region varies from 39.4 nGy h -1 to 78.8 nGy h -1 with a mean value of 48.2 nGy h -1 . The results of the systematic studies on the distribution and enrichment of 210 Po and 210 Pb and the absorbed gamma dose rate in air are presented and discussed in this paper. (author)

Observations on the ecology of some sandy beaches of the southwest coast of India

Digital Repository Service at National Institute of Oceanography (India)

Panikkar, B.M.; Rajan, S.

The seasonal cycles of organic matter and chlorophyll at some beaches of the Kerala Coast were studied in relation to the abundance of the interstitial fauna at one of the beaches The faunal abundance showed no definite correlation either...

Preliminary observations on an 18th-century wreck at Poompuhar (east coast of India)

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A.S.; Sundaresh; Saxena, M.; Tripati, S.; Gudigar, P.

equipment and the second comprised visual inspection by diving. The study shows that the wreck is 200 years old and appears to be of moderate size and 50 m long. Its locating suggests Danish nationality and it possibles belongs to East India Company....

Deep water marine algal flora of the submerged banks off west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Ambiye, V.; Untawale, A.G.

A survey of submerged banks off India viz Cora Divh, Sessostris and Bassas de-Pedro resulted in obtaining information on the rich and diverse marine algal flora from various depths ranging from 18-70 m. A programme of onboard dredging was undertaken...

Tidal regime in Gulf of Kutch, west coast of India, by 2D model

Digital Repository Service at National Institute of Oceanography (India)

Unnikrishnan, A.S.; Gouveia, A.D.; Vethamony, P.

of topographically generated eddies. An analysis of momentum balance shows that the dynamics of tidal propagation in the Gulf is characterized by a balance between the pressure gradient and friction near the coast, whereas in the central region, local acceleration...

Electron cloud effects in SIS-18 and SIS-100

Energy Technology Data Exchange (ETDEWEB)

Petrov, Fedor; Boine-Frankenheim, Oliver [Technische Universitaet Darmstadt, Institut fuer Theorie Elektromagnetischer Felder (TEMF) (Germany); Gesellschaft fuer Schwerionenforschung (GSI) GmbH, Darmstadt (Germany); Weiland, Thomas [Technische Universitaet Darmstadt, Institut fuer Theorie Elektromagnetischer Felder (TEMF) (Germany)

2011-07-01

Electron cloud build-up and associated instabilities are studied in simulations under conditions relevant to SIS-18 and to the projected SIS-100 heavy ion synchrotrons. In both rings coasting beams are foreseen during slow extraction of the beam. Trapped electrons could lead to a reduction of the extraction efficiency. We present the results of electron cloud studies for bunched and for coasting beams. In these two regimes the main production mechanisms are significantly different. For coasting beams the most important mechanism is residual gas ionization, for bunched beam the main source of electrons is secondary emission. In the case of coasting beams electrons are generated in the vicinity of the beam center and a two-stream instability may occur for the projected intensities.Electron clouds due to bunched beams are of concern in SIS-100 because no special coating of the stainless steel beam pipe is presently foreseen. Finally we also discuss experimental studies of electron cloud generation in SIS-18.

Using participatory modelling to compensate for data scarcity in environmental planning: A case study from India

NARCIS (Netherlands)

Ritzema, H.P.; Froebrich, J.; Raju, R.; Sreenivas, Ch.; Kselik, R.A.L.

2010-01-01

Participatory modelling has provided a new approach to overcome the problem of data scarcity which formerly interfered with the environmental planning for the restoration of the Kolleru-Upputeru wetland ecosystem on the east coast of Andhra Pradesh in South India. New ways had to be found to address

Mangrove associated lignite beds of Malvan, Konkan: Evidence for higher sea-level during the Late Tertiary (Neogene) along the west coast of India

Energy Technology Data Exchange (ETDEWEB)

Kumaran, K.P.N.; Shindikar, M.; Limaye, R.B. [Agharkar Research Inst., Pune (India)

2004-01-25

Fossil pneumatophores (breathing roots) of Avicennia are recovered and reported from the lignite beds exposed in Kolamb well-section near Malvan, Konkan area of western Maharashtra. The accrued palynoflora is dominated by mangroves (Avicennia, Aegialitis, Excoecaria, Rhizophora and Sonneratia). The spores of mangrove fern (Acrostichum aureum) an estuarine fungus Cirrenalia indicate that these lignites are autochthonous and deposited in a near-shore environment. Presence of foraminiferal linings (= microforaminifera), dinoflagellate cysts, a few calcareous nannofossils and scolecodonts is an irrefutable proof of marine and brackish water influence during the deposition of lignites under intertidal/tidal swampy condition (mangrove influenced) with fair input from freshwater swamps and hinterland. Freshwater-related forms, viz. Ceratopteris thalictroides, Nymphaeaceae, Ctenolophonaceae and hinterland taxa (Cullenia/Durio) of Bombacaceae along with abundance of microthyriaceous fungi in the palynoflora imply a warm humid tropical climate with high precipitation during the depositional period. The presence of Ctenolophon englerianus (= Ctenolophonidites costatus) in Kolamb lignites suggests the Late Neogene (Late Miocene-Early Pliocene) age. The occurrence of pneumatophores and associated lignite deposits about 37 m above the present mean sea-level, and much inland, clearly indicates the higher sea-level strand during Late Neogene along the west coast of India.

Vulnerable areas and adapation measures for sea level rise along the coast of India

Digital Repository Service at National Institute of Oceanography (India)

Chauhan, O.S.; Unnikrishnan, A.S.; Menezes, A.A.A.; Jagtap, T.G.; Suneethi, J.; Furtado, R.

India has a coastline of about 7500 km with contrasting geological setting. Based upon the available models, global sea level rise of 10-25 cm per 100 year has been predicted due to emission of green house gases. To separate out the influences due...

On the occurrence of the Fishing Cat Prionailurus viverrinus Bennet, 1833 (Carnivora: Felidae in coastal Kerala, India

Directory of Open Access Journals (Sweden)

R. Janardhanan

2014-03-01

Full Text Available The Fishing Cat Prionailurus viverrinus is classified as Endangered in the IUCN Red List and yet its distribution range within India is not resolved. In spite of its potential habitat being present in coastal Kerala, there are only a few, unsubstantiated records of the cat. Moreover, its occurrence in Sri Lanka strengthens the possibility of its presence (historical or current population in southern India, including Kerala. This survey was conducted to assess the occurrence of the Fishing Cat in coastal Kerala through personal informal interviews with local people and molecular analysis of scats. The study failed to find any evidence of the occurrence of Fishing Cat in the coastal areas of Kerala. We discuss two possibilities - one, of the species existing earlier but driven to extinction in recent decades, due to high levels of land conversion through anthropogenic activities in these areas and the other of the Fishing Cat having never occurred in coastal Kerala. A speculative reasoning for its absence from the region could be related to the difference in salinity levels between the eastern and western coasts of India which has already been documented. Moreover, fewer freshwater sources merge into the sea in coastal areas of Kerala as compared to the eastern coast of India. This could limit the distribution of the Fishing Cat. The argument was also supported by the lack of any authentic report till date or of local names for the Fishing Cat in the region.

Studies on sound signal scattering from varying seabed sediments of the western continental shelf of India: Cochin to Mangalore

Digital Repository Service at National Institute of Oceanography (India)

Chakraborty, B.; Pathak, D.

A study on the interaction effect of the acoustic signal with three different sediment type seabottoms off the shelf area between Cochin and Mangalore of the west coast of India is performed. Analyses by means of Probability Density Function (PDF...

Extreme sea level variability along the coast of India. Vol. 1-2

Digital Repository Service at National Institute of Oceanography (India)

Unnikrishnan, A.S.; Shetye, S.R.; Shankar, D; Sundar, D; Michael, G.S.; Fernandes, S.E.; Telang, M.

52 Annexure – II 53 Annexure – III 107 Project Team A.S. Unnikrishnan S.R. Shetye D. Shankar D... 95˚E 95˚E 5˚N 5˚N 10˚N 10˚N 15˚N 15˚N 20˚N 20˚N 25˚N 25˚N Arabian Sea Bay of Bengal Indian Ocean India Contai Nagapattinam Gopalpur Puri Balasore Cape Comorin Nellore Kakinada Chittagong NizampatnamOngole Chandbali Rameswaram Hatia Bhavnagar Porbandar...

Delineation of structural lineaments from marine magnetic anomalies off Jonnalakonda, East Coast of India

Digital Repository Service at National Institute of Oceanography (India)

Sarma, K.V.L.N.S.; Rao, T.C.S.; Rao, D.G.

to charnockitic bodies occurring at shallow depth around 0.37 to 0.4 km and (2) the high frequency and amplitude anomalies near to the coast are trending north west-south east direction. The well developed magnetic anomaly is interpreted following automated Werner...

Mapping of Environmental Sensitive Index (ESI) for the oil spills at Goa coast, India

Digital Repository Service at National Institute of Oceanography (India)

ManiMurali, R.; Kumar, R.

and spits (Wagle. B.G, 1993). Marine and fluvial features are pre-dominant in this coast. Goa has been identified as one of the major tourist destinations of the world because of its beautiful beaches and associated recreational activities (Vethamony. et al...

Observed tidal currents on the continental shelf off the east coast of India

Science.gov (United States)

Jithin, A. K.; Unnikrishnan, A. S.; Fernando, V.; Subeesh, M. P.; Fernandes, R.; Khalap, S.; Narayan, S.; Agarvadekar, Y.; Gaonkar, M.; Tari, P.; Kankonkar, A.; Vernekar, S.

2017-06-01

In the present study, we analysed 9-month long data from Acoustic Doppler Current Profilers (ADCP) deployed on the shelf off the east coast of India to study the characteristics of tidal currents in the region. The ADCPs were deployed at about 100-150 m depths off Cuddalore (CD, 12.0°N), Ramayapatnam (RM, 15.0°N), Kakinada (KN, 16.3°N) and South of Gopalpur (SG, 18.6°N). Tidal currents in the region are mainly semidiurnal in nature and dominant constituent is M2. Semimajor axes of barotropic tidal ellipses of M2 is about 1.9 cms-1 in the southernmost ADCP location (off CD) and it is about 4.0 cms-1 in the northernmost ADCP location (off SG), which indicate a northward increase of tidal currents. Baroclinic spectra show high energy at tidal frequencies, which suggests the presence of internal tides on the shelf, particularly in the semidiurnal band. Semidiurnal internal tides of about 8-15 cms-1 are observed at different locations and the magnitude is relatively large on the shelf off SG in the northern part of the shelf, which is primarily due to large barotropic forcing on the north. The semidiurnal internal tides are found to be intensified at the bottom, particularly on the shelf off SG and RM. The computed ratio of slope of internal wave characteristics (c) and topographic slope (γ) indicates that large near-critical regions present surrounding the ADCP locations off SG and RM could be the possible reason of bottom intensification at these two locations. EOF analysis shows that observed semidiurnal internal tides are dominated by the first baroclinic mode, where it accounts for about 70-80% of semidiurnal internal tide variability on the shelf off SG and CD, whereas the contribution of the first mode is relatively small (43-50%) on the shelf off KN and RM. Enhanced small-scale vertical shear is observed at the ADCP locations associated with multimode structure of semidiurnal internal tides. Semidiurnal internal tides show a spring-neap variability on the

A medieval port at Ghogha in the Gulf of Khambhat, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A

The Gulf of Khambhat has been a focal area for the human settlements since the Harappan and it is also famous for the highest tidal range in India. The author of the Periplus of the Erythrenean Sea vividly described the sites of the Gulf of Khambhat...

Monitoring shoreline environment of Paradip, east coast of India using remote sensing

Digital Repository Service at National Institute of Oceanography (India)

ManiMurali, R.; Shrivastava, D.; Vethamony, P.

-raey et al. 8 used remote sensing for detecting beach erosion and ac- cretion along Damietta Port, Egypt. Narayana and Priju 9 studied the shoreline changes along the central Kerala coast using satellite images. Shoreline-change mapping was carried... and detecting long-term change in the entire coastline. Meijerink 11 and Rao 12 studied the dynamic geomor- phology of Mahanadi delta and problems of coastal dyna- mics and shoreline changes which arose after the construction of Paradip port. Rupali 13...

Remote sensing approach to determine net shore drift direction- A case study along the central east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Kunte, P.D; Wagle, B.G.

stream_size 10 stream_content_type text/plain stream_name J_Coast_Res_9_663.pdf.txt stream_source_info J_Coast_Res_9_663.pdf.txt Content-Encoding ISO-8859-1 Content-Type text/plain; charset=ISO-8859-1 ...

Shallow seismic and geomorphic expression of buried wave-cut terrace and erosional valleys off Redi, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Subbaraju, L.V.; Wagle, B.G.

stream_size 6 stream_content_type text/plain stream_name J_Coast_Res_12_205.pdf.txt stream_source_info J_Coast_Res_12_205.pdf.txt Content-Encoding ISO-8859-1 Content-Type text/plain; charset=ISO-8859-1 ...

Vertical propagation of baroclinic Kelvin waves along the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Nethery, D; Shankar, D

; monsoon current; equatorial oceanography; remote forcing; modelling; monsoons; oceanography. J. Earth Syst. Sci. 116, No. 4, August 2007, pp. 331?339 ? Printed in India. 331 332 D Nethery and D Shankar Figure 1. The stability or buoyancy frequency squared... and rho represents (dimen- sionless) density anomaly. The vertical modes psin are the eigenfunctions of the equation parenleftbigg (psi n)z N2b parenrightbigg z = - 1c2 n psin, (3) subject to the boundary conditions (psin)z =0 at z = -D and z = 0, where...

Seasonal cycle of sea level and currents along the coast of India

Digital Repository Service at National Institute of Oceanography (India)

Shankar, D.

on their right (in the northern hemisphere). Their offshore e-folding scale varies with: latitude, but is of the order of 100 km. SPECIAL SECTION: Figure 6. Annual cycle of surface circulation simulated by a 1? -layer dynamical reduced-gravity model of the Indian... FEBRUARY 2000 PERSPECTIVES ON OCEAN RESEARCH IN INDIA e-folding scale of the order of 100 km, and they are not resolved by the gridded altimeter data. Numerical models developed in the 1990s have been fairly successful in simulating the basic features...

Plankton food web and its seasonal dynamics in a large monsoonal estuary (Cochin backwaters, India)-significance of mesohaline region

Digital Repository Service at National Institute of Oceanography (India)

Sooria, P.M.; Jyothibabu, R; Anjusha, A.; Vineetha, G.; Vinita, J.; Lallu, K.R; Paul, M.; Jagadeesan, L.

The paper presents the ecology and dynamics of plankton food web in the Cochin backwaters (CBW), the largest monsoonal estuary along the west coast of India. The data source is a time series measurement carried out in the CBW during the Spring...

Sightings and behavioral observations of Indo-Pacific Humpback Dolphins Sousa chinensis (Osbeck, 1765 along Chennai coast, Bay of Bengal

Directory of Open Access Journals (Sweden)

R. Muralidharan

2013-11-01

Full Text Available Boat-based surveys were used to investigate the presence of Indo-Pacific Humpback Dolphins Sousa chinensis along the coast of Chennai, Tamil Nadu, India. Notes were collected on behavior, group size, coloration patterns and group composition on sighting cetaceans during the surveys. Four groups of Indo-Pacific Humpback Dolphins were sighted near-shore in the month of February 2011, between 10-25 m depth with an average group size of 20 individuals of which 10 individuals were photo-identifiable. Dominant group behavior was aerial display, feeding and traveling. This study gives a basic idea of presence, threats and habitat use of Humpback Dolphin areas along Chennai coast.

India in the Knowledge Economy--An Electronic Paradigm

Science.gov (United States)

Bhattacharya, Indrajit; Sharma, Kunal

2007-01-01

Purpose: The purpose of this paper is to make a strong case for investing in information and communication technologies (ICT) for building up of quality human resource capital for economic upliftment of India. An attempt has been made to explore the possibilities of online learning (OL)/e-learning towards building up of quality human resources in…

New species of Pseudodiaptomus (Copepoda: Calanoida) from the salt pans of the Gulf of Kutch, India and a comment on its speciation

Digital Repository Service at National Institute of Oceanography (India)

Madhupratap; Haridas, P.

A new species of calanoid copepod Pseudodiaptomus pankajus (family Pseudodiaptomidae) is described from the north-west coast of India. This species inhabits high saline waters of salt pans. It appears to have evolved allopatrically during...

Petroleum hydrocarbon concentrations in marine sediments along Chennai Coast, Bay of Bengal, India.

Science.gov (United States)

Venkatachalapathy, R; Veerasingam, S; Ramkumar, T

2010-10-01

The spatial and temporal distribution of petroleum hydrocarbons (PHC) in marine sediments along the Chennai coast, Bay of Bengal was quantified by Ultra-Violet Fluorescence (UVF) Spectroscopy. The concentration of PHC in surface sediments varied from 1.88 to 39.76 ppm. The highest values obtained in the northern part of the study area, where shipping activities and land-based waste waters disposed into sea through the rivers like Kuvam and Adayar. The Adayar (7.26-16.83 ppm) and Kuvam (5.5-39.72 ppm) cores reveal a clear horizon of increase in PHC above 50 and 35 cm respectively. PHC values showed a decreasing pattern with depth in all sediment cores suggesting the excess anthropogenic loading occurring in the recent past. The present study revealed that the PHC values of Chennai coastal sediments are lower than the values reported from selected costal areas including the sediment of the Mumbai coast (7.6-42.8 ppm), Arabian Sea. The results will be useful for pollution monitoring program along the coastal region and also to check the level of petroleum hydrocarbons in marine sediments.

Nitrate levels modulate denitrification activity in tropical mangrove sediments (Goa, India)

Digital Repository Service at National Institute of Oceanography (India)

Fernandes, S.O.; LokaBharathi, P.A.

.M., & Bundrick, C.M. (1998). Potential sediment denitrification rates in estuaries of Northern Gulf of Mexico. Journal of environmental quality, 27(4), 859-868. Gruber, N., & Sarmiento, J.L. (1997). Global. Biogeochemical Cycles, 11, 235-266. Hahndel, R... of inorganic nitrogen in mangrove sediments (Terminos Lagoon, Mexico). Limnology and Oceanography, 41, 284-296. Sardessai, S. (1993). Dissolved, particulate and sedimentary humic acids in the mangroves and estuarine ecosystem of Goa, west coast of India...

Multi-hazard risk assessment of coastal vulnerability from tropical cyclones - A GIS based approach for the Odisha coast.

Science.gov (United States)

Sahoo, Bishnupriya; Bhaskaran, Prasad K

2018-01-15

The coastal region bordering the East coast of India is a thickly populated belt exposed to high risk and vulnerability from natural hazards such as tropical cyclones. Tropical cyclone frequencies that develop over the Bay of Bengal (average of 5-6 per year) region are much higher as compared to the Arabian Sea thereby posing a high risk factor associated with storm surge, inland inundation, wind gust, intense rainfall, etc. The Odisha State in the East coast of India experiences the highest number of cyclone strikes as compared to West Bengal, Andhra Pradesh, and Tamil Nadu. To express the destructive potential resulting from tropical cyclones the Power Dissipation Index (PDI) is a widely used metric globally. A recent study indicates that PDI for cyclones in the present decade have increased about six times as compared to the past. Hence there is a need to precisely ascertain the coastal vulnerability and risk factors associated with high intense cyclones expected in a changing climate. As such there are no comprehensive studies attempted so far on the determination of Coastal Vulnerability Index (CVI) for Odisha coast that is highly prone to cyclone strikes. With this motivation, the present study makes an attempt to investigate the physical, environmental, social, and economic impacts on coastal vulnerability associated with tropical cyclones for the Odisha coast. The study also investigates the futuristic projection of coastal vulnerability over this region expected in a changing climate scenario. Eight fair weather parameters along with storm surge height and onshore inundation were used to estimate the Physical Vulnerability Index (PVI). Thereafter, the PVI along with social, economic, and environmental vulnerability was used to determine the overall CVI using the GIS based approach. The authors believe that the comprehensive nature of this study is expected to benefit coastal zone management authorities. Copyright © 2017 Elsevier Ltd. All rights reserved.

Macrobenthos off Mahim (Bombay), west coast of India in relation to coastal pollution and aquaculture

Digital Repository Service at National Institute of Oceanography (India)

Varshney, P.K.; Govindan, K.

/EEC. 1979. Report submitted to the Municipal Corporation of Greater Bombay upon the methods for treatment and disposal of waste water from greater Bombay. Vols I & II ( Metcalf & Eddy Inc, USA & Environmental Engineering Consultants, India). NIO...

Studies on nearshore processes at Yarada beach (South of Visakhapatnam harbour) east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Chandramohan, P.; Rao, T.V.N.; Rao, D.P.; Rao, B.P.

Influence of breakwaters on Yarada Beach, Andhra Pradesh, India (3.5 km length) stability and distribution on wave induced longshore currents in this region were studied. Monthly observations on variation in beach levels, distribution of wave...

Tides in the Mandovi and Zuari estuaries, Goa, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Sundar, D; Shetye, S.R.

, October 2005, pp. 493?503 ? Printed in India. 493 494 D Sundar and S R Shetye Figure 1. A map of the Mandovi and Zuari estuaries. The locations where water level observations were carried out are marked with a number in a circle. The name of the location... consecutive values. The amplitudes and phase lags were recomputed using a time series in which the time interval between two consecu- tive values was two hours. As the original data are 496 D Sundar and S R Shetye Figure 3. Observed sea level (cm) during...

Magnetic studies of basement off the coast of Bombay, West of India

Digital Repository Service at National Institute of Oceanography (India)

Rao, D.G.

) and present stud- ies. Geological setting Onshore geology The geology of the onshore area between lati- tudes 15 o N and 25” N and longitudes 69”30’E and 82”OO’E adjacent to the study area is con- cealed underneath basalts (Deccan traps) of un- known... resulted in the observed struct- ural configuration in the study area of the con- tinental margin, northwest of India. Acknowledgements The author is indebted to Dr. B.N. Desai, for encouragement while carrying out the studies. Part of the data...

Sea level changes induced by local winds on the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Mehra, P.; Tsimplis, M.N.; Desai, R.G.P.; Joseph, A.; Shaw, A.G.P.; Somayajulu, Y.K.; Cipollini, P.

1 National Institute of Oceanography, Goa, India 2 National Oceanography Centre, Southampton, UK # [Corresponding author: pmehra@nio.org] Abstract The contribution of atmospheric pressure and wind to sea level variability at Goa (West...), Southampton under an Indian Ocean Tsunami Warning System (IOWTS) fellowship-2008-2009. We are all grateful to the International Oceanographic Commission for providing us with the opportunity of working together. 17 R: Correlation coefficient between sea...

Speciation and behaviour of Cd, Pb and Cu in Zuari Estuary, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

George, M.D.

Dissolved labile and nonlabile forms of Cd, Pb and Cu in Zuari Estuary, Goa, India measured for a period of 14 months showed lowest concentrations during the SW monsoon (June-September) while maximum concentrations were observed during...

Littoral processes and their relevance to the submergence of ancient ports along Andhra coast, India

Digital Repository Service at National Institute of Oceanography (India)

Chauhan, O.S.

profile transformation. The bivariant plots of size measures suggest that the source of the sediments is through river source. The dominance of depositional processes leading to the accretionary nature of the coast and their relationship...

Seroprevalence of Burkholderia pseudomallei among Adults in Coastal Areas in Southwestern India.

Directory of Open Access Journals (Sweden)

Kalwaje Eshwara Vandana

2016-04-01

Full Text Available Although melioidosis, is an important disease in many Southeast Asian countries and Australia, there is limited data on its prevalence and disease burden in India. However, an increase in case reports of melioidosis in recent years indicates its endemicity in India.A population-based cross-sectional seroprevalence study was undertaken to determine the seroprevalence of B. pseudomallei by indirect haemagglutination assay and to investigate the associated risk determinants. Subjects were 711 adults aged 18 to 65 years residing in Udupi district, located in south-western coast of India.Overall, 29% of the study subjects were seropositive (titer ≥20. Females were twice as likely to be seropositive compared to males. Rates of seroprevalence were similar in farmers and non-farmers. Besides gardening, other factors including socio-demographic, occupational and environmental factors did not show any relationship with seropositive status.There is a serological evidence of exposure to B. pseudomallei among adults in India. While the bacterium inhabits soil, exposure to the agent is not limited to farmers. Non-occupational exposure might play an important role in eliciting antibody response to the bacterium and may also be an important factor in disease causation.

ATS-6 radio beacon electron content measurements at Ootacamund, India, October 1975-July 1976

International Nuclear Information System (INIS)

Bouwer, S.D.; Davies, K.; Donnelly, R.F.; Grubb, R.N.; Jones, J.E.

1980-03-01

An atlas of total slant-path columnar electron content data measured between the ATS-6 satellite and Ootacamund, India, a site near the magnetic Equator is presented. Although these measurements were taken during a solar minimum, the general level of flare and geomagnetic activity that occurred during the observation period is summarized. These total content (N(T)) data were derived from the modulation phase (group delay) of a carrier signal transmitted from the geostationary satellite's Radio Beacon Experiment. This atlas contains two data sets: (1) N(T) as 2-min subsamples digitally recorded between 2 October 1975 and 28 January 1976 corrected for ATS-6 pitch maneuvers and (2) N(T) as 15-min subsamples chart recorded between 21 October 1975 and 22 July 1976 but uncorrected for changes in satellite orientation

Diatom colonization on stainless steel panels in estuarine waters of Goa, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Mitbavkar, S.; Anil, A.C.

Temporal variations in diatom fouling was investigated at the Dona Paula Bay located at the mouth of the Zuari Estuary, Goa, India. Stainless steel panels admeasuring 15 x 10 cm were exposed to the environment every month for four consecutive days...

Petroleum hydrocarbons and trace metals in Visakhapatnam harbour and Kakinada Bay, east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Sarma, V.V.; VaraPrasad, S.J.D.; Gupta, G.V.M.; Sudhakar, U.

High concentrations of PHC were observed in the inner channels (viz. South lighter canal, Northern arm, North Western arm and Western arm) of Visakhapatnam Harbour, Andhra Pradesh, India. The estimation of trace metals (Cu, Zn, Pb, Cd, Co, Ni and Cr...

78 FR 61844 - North Atlantic Coast Comprehensive Study

Science.gov (United States)

2013-10-04

...: The U.S. Army Corps of Engineers (USACE) is requesting peer reviewed information that would be useful in the preparation of the North Atlantic Coast Comprehensive Study (Hurricane Sandy). The USACE is... information by electronic mail to: [email protected] . Please include your name and contact information in...

Studies on radionuclide concentration along the Northern Coast of Krusadai Island

International Nuclear Information System (INIS)

Inigo Valan, I.; Stephen, A.; Mathiyarasu, R.; Murthy, S.M.S.; Vijayalakshmi, I.

2014-01-01

Krusadai Island - The Biologist's Paradise, is situated in Gulf of Mannar (GaM) near Rameswaram of Tamilnadu, India. It has been recognized as Ecological sensitive area under Coastal regulation zone notification 1991 because these area act as the breeding zone for a variety of marine species, most of which are consumed by human population. Above all Govt. of India and Govt. of Tamil Nadu jointly declared Gulf of Mannar as Marine National Park under Wildlife (Protection) Act 1972. So it is essential to have a periodic radiological survey in this area in order to check the concentrations of various radionuclide. Apart from this 2004 Tsunami had many devastating effects along the coastal Tamil Nadu. GOM (Especially Rameswaram coast) didn't suffer a lot due to the barricade-like protection given by the island nation Sri Lanka. But reports suggest that northeastern part of the Krusadai Island had noticeable effects due to Tsunami, which interests to study this area. Current study is a preliminary radioactive report on the northern part of the Krusadai Island

Occurrence of Hydroclathrus tenuis Tseng and Baoren, (Phaeophyta) from Gulf of Kutch, northwest coast of India

Digital Repository Service at National Institute of Oceanography (India)

Jagtap, T.G.; Untawale, A.G.

of Kutch (India), during February-March 1994. A few ecological and relevant taxonomical observations made on the alga have been described here, which is incidently the first record from the Indian Ocean....

India [Marine Radioecology. Current Research and Future Scope

International Nuclear Information System (INIS)

Ganguly, A.K.; Viswanathan, R.; Patel, B.; Bhatt, Y.M.; Pillai, K.C.

1967-01-01

Present research programme (long-term) - Radioactivity studies in the marine environment of the West Coast of India: (a) To understand the radioactivity and trace-element distribution in the continental shelf in Arabian Sea. This has the twin objectives of gaining basic information on marine geochemistry and marine biochemistry and assessing the capacity of the region to receive radioactive wastes from atomic energy installations. (b) To derive maximum permissible radioactive contamination limits in sea-water, marine organisms and marine products. (c) To collaborate with IAEA in research contract (Project Marina) with objectives stated in (a) and (b) above

Comparative study of electron conduction in azulene and naphthalene

Indian Academy of Sciences (India)

Wintec

tional or electronic devices. Recent advances in experi- mental techniques have allowed ... stimulates us to study the electronic conduction in azulene molecule and to compare that with its isomer, naphthalene. ..... ernment of India, for funding and (SD) acknowledges CSIR,. Government of India, for a research fellowship.

Ecology and Distribution of Copepods from the Salt Pan Ecosystems of Mumbai, West Coast of India

Digital Repository Service at National Institute of Oceanography (India)

Stephen, R.; Jayalakshmy, K.V.; NaveenKumar, K.R.; Nair, V.R.

Ecology, distribution and diversity of Copepod collected from two salt pans of Mumbai, India, are presented. Copepods, the mai zooplankton components, consisted mainly of Bestiolina similis, Acartia southwelli, Oithona sp., O. similis, O. hebes...

Phytochemical analysis and antifungal activity of selected seaweeds from Okha coast, Gujarat, India

Directory of Open Access Journals (Sweden)

Isaiah Nirmal Kumar

2015-07-01

Full Text Available Objective: To deal with the assessment of the chemical composition of carbohydrate, protein, phenol, flavanoid, chlorophyll, and carotenoid and antifungal activity of various marine seaweeds collected from Okha coast, Gujarat during September, 2013. Methods: Biochemical compounds of selected seaweeds were quantified and antifungal activity of these species belonging to red, green, and brown seaweeds was explored and the seaweeds were extracted in acetone, ethanol and chloroform. Results: The carbohydrate content was highest in Cystoseira indica Mairh, protein was highest in Gracilaria corticata J. Agardh and phenol content was highest in Padina boergesenii; flavanoid content was found greater in Cystoseira indica, chlorophyll content was found greater in Monostroma latissimum Wittrock and carotenoid content was more in Dictyopteris acrostichoides Bornet. The highest inhibiting effect was noted for Sargassum tenerrimum J. Agardh and Turbinaria ornata J. Agardh belonging to brown algae, against Aspergillus niger and Penicillium janthinellum in chloroform extracts and ethanolic extracts, which caused opportunistic infection of HIV-infected person, lung disease, aspergillosis, and otomycosis (fungal ear infections. Conclusions: The study reveals that the seaweeds contain high amount of biochemical constituents. Besides, the crude extracts of the seaweeds showed promising activity against the tested fungal pathogens. Therefore, seaweeds collected from Okha coast, Gujarat region are biochemical compounds with potential capacity which make them useful for screening natural products for pharmaceutical industry.

Mapping of coastal aquifer vulnerable zone in the south west coast of Kanyakumari, South India, using GIS-based DRASTIC model.

Science.gov (United States)

Kaliraj, S; Chandrasekar, N; Peter, T Simon; Selvakumar, S; Magesh, N S

2015-01-01

The south west coast of Kanyakumari district in Tamil Nadu, India, is significantly affected by seawater intrusion and diffusion of pollutants into the aquifers due to unregulated beach placer mining and other anthropogenic activities. The present study investigates the vulnerability of the coastal aquifers using Geographic Information System (GIS)-based DRASTIC model. The seven DRASTIC parameters have been analyzed using the statistical equation of this model to demarcate the vulnerable zones for aquifer contamination. The vulnerability index map is prepared from the weighted spatial parameters, and an accounting of total index value ranged from 85 to 213. Based on the categorization of vulnerability classes, the high vulnerable zones are found near the beach placer mining areas between Manavalakurichi and Kodimanal coastal stretches. The aquifers associated with settlements and agricultural lands in the middle-eastern part have experienced high vulnerability due to contaminated water bodies. Similarly, the coastal areas of Thengapattinam and Manakudi estuary and around the South Tamaraikulam have also been falling under high vulnerability condition due to backwater and saltpan. In general, the nearshore region except the placer mining zone and the backwater has a moderately vulnerable condition, and the vulnerability index values range from 149 to180. Significantly, the northern and northeastern uplands and some parts of deposition zones in the middle-south coast have been identified as low to no vulnerable conditions. They are structurally controlled by various geological features such as charnockite, garnet biotite gneiss and granites, and sand dunes, respectively. The aquifer vulnerability assessment has been cross-verified by geochemical indicators such as total dissolved solids (TDS), Cl(-), HCO₃(-), and Cl(-)/HCO₃(-) ratio. The high ranges of TDS (1,842--3,736 mg/l) and Cl(-) (1,412--2,112 mg/l) values are well correlated with the observed high

Radiation processing in India. Current status and future program

International Nuclear Information System (INIS)

Mittal, Jai Pal

2003-01-01

Radiation processing is an alternative to conventional methods such as thermal and chemical processing in many industrial applications. In India, this technology has found extensive applications in area of healthcare, agriculture, food preservation, industry and environment. Both gamma radiation and electron beam accelerators are being utilized for this purpose. Presently, 6 commercial gamma irradiators housing about 1.5 million curie Co-60 and an annual turnover of over US$ 2 million and 3 commercial electron beam (EB) accelerators with installed capacity of 185 kW are commercially operating in India. Five demonstration plants housing a total of 0.5 million curie Co-60 have been set up to assess the techno-commercial viability of the processes such as radiation vulcanization of natural rubber latex, decontamination of spices, hygienization of sewage sludge, shelf-life extension of onions. The new areas being explored include use of electron beam treated pulp for viscose-rayon process, radiation processed 'hydrogel' burn/wound dressings and radiation processing of natural polymers. In the present paper, the current status of this program, especially the recent developments and future direction of radiation processing technology in India is reviewed. (author)

Genetic variations in the Dravidian population of South West coast of India: Implications in designing case-control studies.

Science.gov (United States)

D'Cunha, Anitha; Pandit, Lekha; Malli, Chaithra

2017-06-01

Indian data have been largely missing from genome-wide databases that provide information on genetic variations in different populations. This hinders association studies for complex disorders in India. This study was aimed to determine whether the complex genetic structure and endogamy among Indians could potentially influence the design of case-control studies for autoimmune disorders in the south Indian population. A total of 12 single nucleotide variations (SNVs) related to genes associated with autoimmune disorders were genotyped in 370 healthy individuals belonging to six different caste groups in southern India. Allele frequencies were estimated; genetic divergence and phylogenetic relationship within the various caste groups and other HapMap populations were ascertained. Allele frequencies for all genotyped SNVs did not vary significantly among the different groups studied. Wright's FSTwas 0.001 per cent among study population and 0.38 per cent when compared with Gujarati in Houston (GIH) population on HapMap data. The analysis of molecular variance results showed a 97 per cent variation attributable to differences within the study population and variation due to differences between castes. Phylogenetic analysis showed a separation of Dravidian population from other HapMap populations and particularly from GIH population. Despite the complex genetic origins of the Indian population, our study indicated a low level of genetic differentiation among Dravidian language-speaking people of south India. Case-control studies of association among Dravidians of south India may not require stratification based on language and caste.

Delineation of structural lineaments from marine magnetic anomalies off Lawson's Bay (Visakhapatnam), East Coast of India

Digital Repository Service at National Institute of Oceanography (India)

Murthy, K.S.R.; Rao, T.C.S.; Rao, M.M.M.

Marine magnetic surveys have recorded total field anomalies that correspond to structural lineaments extending from the coast into the sea. The significant anomalies recorded in this area are along wavelength high amplitude negative anomaly...

A checklist of malacofauna of the Vellar Estuarine Mangroves, India

Directory of Open Access Journals (Sweden)

K. Kesavan

2009-07-01

Full Text Available A survey conducted to know the diversity of malacofauna in Vellar estuarine mangroves (southeast coast of India. In this study, 13 species of molluscs (10 species of gastropods - Melampus ceylonicus, Cerithidea cingulata, Cassidula nucleus, Pythia plicata, Neritina (Dostia violacea, Littorina scabra, Littorina melanostoma, Ellobium aurisjudae, C. obtusa T. telescopium and Assiminea nitida and 3 species of bivalves - Perna viridis, Crassostrea madrasensis and Modiolus metcalfei were recorded. M. pulchella, C. obtusa, L. scabra and N. violacea were found arboreal. T. telescopium, C. cingulata and E. aurisjudae were found crawling on the intertidal mud.

Understanding heavy mineral dynamics using magnetic fingerprinting technique: A case study of North Maharashtra Coast, India

Digital Repository Service at National Institute of Oceanography (India)

Badesab, F.K.; Iyer, S.D.; Gujar, A; Naik, D.K.; Gaonkar, S.S.; Luis, R.A.A; Shirodkar, P.; Naik, Smita

Environmental magnetic and grain size measurements were carried out on sand samples collected from nine sand pits along a 20-km coastal stretch of Arnala Beach, North Maharashtra, India. This study sets out to identify the potential heavy (magnetite...

Coastal circulation along the central west coast of India during cyclone Phyan: measurements and numerical simulations

Digital Repository Service at National Institute of Oceanography (India)

VinodKumar, K.; Aboobacker, V.M.; Saheed, P.P.; Vethamony, P.

Measurements and numerical simulations carried out off Mumbai coast for the period 22 October to 22 November 2009 showed significant variations in water level and currents during cyclone Phyan. Changes in the meridional component of the current...

Taxonomy and distribution of benthic foraminifera from the sediments of Palk Strait, Tamil Nadu, east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Gandhi, S.; Rajamanickam, G.V.; Nigam, R.

.la-b. - Bhalla and Nigam, 1979, p.239. pl. 1.- Nigam and Theide. 1983, pp. 148-149, pl.13, figs.l0a-b. - Mayankar, 1994, p.138, pl.15. - Rao, 1998. p.192. pl.47. figs 5-6. Hypotype : Length - 0.40 mm Breadth - 0.24 mm Remarks : The same species has also been... of western India. Contr. Cush. Found. Forain. Re\\. 7 : 15-24. Bhalia, S.B. and Bhalla, S.N. 1959. Recent foraminifera from the beach sands at Puri, Orissa. Jour. Pal. Soc. India, 4:78-81. Boltovskoy, E. 1954. Foraminiferos de la Bahia San Blas. Rivista del...

Bioactive compounds and antifungal activity of three different seaweed species Ulva lactuca, Sargassum tenerrimum and Laurencia obtusa collected from Okha coast, Western India

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Megha Barot

2016-04-01

Full Text Available Objective: To evaluate bioactive compounds responsible for antifungal activity from seaweeds of Okha coast, Western India. Methods: Each species were extracted with different solvents with increasing polarity: hexane, ethyl acetate, chloroform and methanol using Soxhlet apparatus. The antifungal activity was determined by agar diffusion plate method by using fluconazole, ketoconazole and amphotericin B as standards. Gas chromatography-mass spectrometer analysis was done for identification of bioactive compounds present in crude extract. Results: The gas chromatography-mass spectrometer analysis of all the extracts revealed the presence of steroids, fatty acids and esters compounds. Among the three species, the maximum crude extract yield (53.46% and the largest inhibition zone (36 mm were recorded in methanol extract of Ulva lactuca, whereas the minimum crude extract yield and inhibition zone were recorded in chloroform extract of the same species as 0.5% and 10 mm, respectively. Methanol and ethyl acetate extract showed the maximum antifungal activity and the major important compounds like steroids, fatty acids and esters were detected with higher amount in all the extracts. Conclusions: The present study revealed that the different seaweed extracts showed moderate to significant antifungal activity against the strains tested as compared with the standard fungicides, and polar solvents methanol and ethyl acetate were comparatively efficient for extraction of different metabolites that are responsible for antifungal activity.

Environmental sensitivity mapping and risk assessment for oil spill along the Chennai Coast in India.

Science.gov (United States)

Kankara, R S; Arockiaraj, S; Prabhu, K

2016-05-15

Integration of oil spill modeling with coastal resource information could be useful for protecting the coastal environment from oil spills. A scenario-based risk assessment and sensitivity indexing were performed for the Chennai coast by integrating a coastal resource information system and an oil spill trajectory model. The fate analysis of spilled oil showed that 55% of oil out of a total volume of 100m(3) remained in the water column, affecting 800m of the shoreline. The seasonal scenarios show major impact during the southwest (SW) and northeast (NE) monsoons and more fatal effects on marine pelagic organisms during SW monsoon. The Oil Spill Risk Assessment Modeler tool was constructed in a geographic information systems (GIS) platform to analyze the risks, sensitivity mapping, and priority indexing of resources that are likely to be affected by oil spills along the Chennai coast. The results of sensitivity mapping and the risk assessment results can help organizations take measures to combat oil spills in a timely manner. Copyright © 2016 Elsevier Ltd. All rights reserved.

Intranet Prototype for the United States Coast Guard Electronic Systems Support Unit Alameda

National Research Council Canada - National Science Library

Benhart, Ralph

1998-01-01

...) Alameda, a small Coast Guard command. To accomplish this task, this thesis will introduce the concept of Intranet technology, portray the efforts required to create an Intranet, and then discuss the benefits associated with Intranet use...

Oil Spill detection off the eastern coast of India using Sentinel-1 dual polarimeteric SAR imagery

Science.gov (United States)

De, S.; Bhattacharya, A.; Gautam, R.

2017-12-01

Among the various Earth observing sensors, the spaceborne Polarimetric Synthetic Aperture Radar (PolSAR) is considered as one of the most flexible and has been widely used in disaster response applications due to its all-weather illumination independent capability. Sentinel-1 is a two-satellite constellation with a C-band polarimetric Synthetic Aperture Radar (PolSAR) sensor, which provides global coverage with a 12-day repeat cycle in the same acquisition geometry, and the possibility of a 3-day repeat imaging in independent geometry, making it ideal for operational geodynamic monitoring. The proposed study aims to detect changes in polarimetric parameters associated with an oil spill event occurred off the coast of Ennore, Tamil Nadu, India (13.228° N Lon: 80.363° E ) on 28 January 2017. The initial spill covered an area of approximately 7.26 sq. km, spreading to an area of 12.56 sq. km. in a single day. The spread was mainly attributed to the strong shore parallel southerly current. To this end, two PolSAR images were used from before and after the event acquired on 17 and 29 January 2017, respectively in dual-polarimetric (VV,VH) interferometric wide swath mode and with same acquisition geometry. The images are first calibrated, co-registered and terrain corrected to make them comparable in a geo-coordinate framework. A refined Lee speckle filter is applied with a 5x5 window to reduce the influence of coherent speckle. The pair of images are then used to generate a hellinger distance based change index corresponding to each polarimetric channel. The indices are then applied as input to a Convolutional Neural Network (CNN) with the objective of discriminating the areas corresponding to changes due to the oil spill, movement of ships, rough ocean surface etc. The final result is a binary change detection map of the oil spill area. The results obtained were compared with that obtained by survey of the affected oil spill area by the Integrated Coastal and Marine

Public health informatics in India: the potential and the challenges.

Science.gov (United States)

Athavale, A V; Zodpey, Sanjay P

2010-01-01

Public health informatics is emerging as a new and distinct specialty area in the global scenario within the broader discipline of health informatics. The potential role of informatics in reducing health disparities in underserved populations has been identified by a number of reports from all over the world. The article discusses the scope, the limitations, and future perspective of this novice discipline in context to India. It also highlights information and technology related tools namely Geographical Information Systems, Telemedicine and Electronic Medical Record/Electronic Health Record. India needs to leverage its "technology" oriented growth until now (e.g., few satellite-based telemedicine projects, etc.) simultaneously toward development of "information"-based public health informatics systems in future. Under the rapidly evolving scenario of global public health, the future of the public health governance and population health in India would depend upon building and integrating the comprehensive and responsive domain of public health informatics.

Buried late Pleistocene fluvial channels on the inner continental shelf off Vengurla, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

SubbaRaju, L.V.; Krishna, K.S.; Chaubey, A.K.

with sediments. Cross sectional dimensions between 15 to 100 m width and 2 to 6 m depth suggest a fluvial origin of the channels. These buried channels appear to mark former positions of rivers flowing from the nearby coast and debouching into the Arabian Sea...

Positive Indian ocean dipole events prevent anoxia off the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Parvathi, V.; Suresh, I.; Lengaigne, M.; Ethe, C.; Vialard, J.; Levy, M.; Neetu, S.; Aumont, O.; Resplandy, L.; Naik, H.; Naqvi, S.W.A.

://www.oceancolour.org/, that merges data from the Sea- Figure 1. (a) Histogram of the percentage of years sampled for each calendar month over the 1997–2010 period at CaTS station. Vertical oxygen profiles collected at CaTS in September (b) 1997, (c) 1998, (d) 1999, and (e) 2000... measurements from the Candolim Time Series (CaTS) station located on the WCI on the in- ner shelf off Goa (∼ 15.5◦ N, 73.6◦ E) to construct a seasonal cycle of oxygen variations near the coast. This station has been established by the Council of Scientific...

Secondary production and zooplankton abundance in the coastal waters from Vengurla to Malpe, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Goswami, S.C.

Secondary production and zooplankton abundance in surface and vertical hauls at different stations along 7 transects from Vengurla to Malpe, Maharashtra, India were studied. Zooplankton production varied with the depth of sampling station and type...

Low-frequency variability of sea level along the coast of India

Digital Repository Service at National Institute of Oceanography (India)

Shankar, D.

March?April (the southwest monsoon). -30 -15 0 15 30 etaa Kochi J F M A M J J A S O N D J -30 -15 0 15 30 etaa Mangalore J F M A M J J A S O N D J -30 -15 0 15 30 etaa Marmagao J F M A M J J A S O N D J -30 -15 0 15 30 etaa Mumbai J F M A M J J A S O N D... J Colombo J F M A M J J A S O N D J Chennai J F M A M J J A S O N D J Vishakhapatnam J F M A M J J A S O N D J Paradip J F M A M J J A S O N D J Observed sea level The Seasonal Cycle of Sea Level Along the Coast 85 Figure 4.2 The climatological...

Aquifer Characterization from Surface Geo-electrical Method, western coast of Maharashtra, India

Science.gov (United States)

DAS, A.; Maiti, D. S.

2017-12-01

Knowledge of aquifer parameters are necessary for managing groundwater amenity. These parameters are evaluated through pumping tests bring off from bore wells. But it is quite expensive as well as time consuming to carry out pumping tests at various sites and sometimes it is difficult to find bore hole at every required site. Therefore, an alternate method is put forward in which the aquifer parameters are evaluated from surface geophysical method. In this method, vertical electrical sounding (VES) with Schlumberger configuration were accomplished in 85 stations over Sindhudurg district. Sindhudurg district is located in the Konkan region of Maharashtra state, India. The district is located between north latitude 15°37' and 16° 40' and east longitude 73° 19' and 74° 13'. The area is having hard rock and acute groundwater problem. In this configuration, we have taken the maximum current electrode spacing of 200 m for every vertical electrical sounding (VES). Geo-electrical sounding data (true resistivity and thickness) is interpreted through resistivity inversion approach. The required parameters are achieved through resistivity inversion technique from which the aquifer variables (D-Z parameters, mean resistivity, hydraulic conductivity, transmissivity, and coefficient of anisotropy) are calculated by using some empirical formulae. Cross-correlation investigation has been done between these parameters, which eventually used to characterize the aquifer over the study area. At the end, the contour plot for these aquifer parameters has been raised which reveals the detailed distribution of aquifer parameters throughout the study area. From contour plot, high values of longitudinal conductance, hydraulic conductivity and transmissivity are demarcate over Kelus, Vengurle, Mochemar and Shiroda villages. This may be due to intrusion of saline water from Arabian sea. From contour trends, the aquifers are characterized from which the groundwater resources could be

Early maritime activities of Orissa on the east coast of India: Linkages in trade and cultural development

Digital Repository Service at National Institute of Oceanography (India)

Tripati, S.

In the maritime history of India, Orissa (ancient Kalinga) played a significant role in spreading Indian culture to other parts of the world, including Africa, Rome and Southwest Asia. Archaeological findings, explorations and excavations at various...

Residual fluxes and suspended sediment transport in the lower reaches of Muvattupuzha River, southwest coast of India

Digital Repository Service at National Institute of Oceanography (India)

Revichandran, C.; Balachandran, K.K.; Xavier, J.K.; Rejendran, N.C.

Spatial and seasonal variation of different physical processes governing the transport of salt and sediment of the Muvattupuzha River, in Kerala, India are discussed. Salt and suspended sediment due to tidal pumping was directed upstream, salt...

ELECTRONIC MEDIA LEARNING MATERIALS OF INDIRA GANDHI NATIONAL OPEN UNIVERSITY, INDIA: An Analytical Study

Directory of Open Access Journals (Sweden)

Manoj Roy. V.

2013-10-01

Full Text Available The establishment of the Indira Gandhi National Open University (IGNOU in 1985 has been a milestone in the growth of higher education in India. A very special feature of the University is that a composite of several instructional methods in practice are aimed at giving effective support to distance learners. Self-instructional print materials are the mainstay of the courseware. Besides this, at the support centres, the learners attend a few face-to-face counselling sessions and get access to audio-video materials stocked in the library. Gyandarshan and Gyanvani, the educational television and radio channels broadcast programmes with academic content. The curriculum-based audio-video programmes developed by the University are supplementary in nature. This blending of traditional printed self-learning materials with electronic courseware is a conscious decision of the University which is intended to enhance the quality and effectiveness of learning. Over the years, audio and video cassettes have made way for digital compact discs. Resultant development in information and communication technology heralded virtual campus initiatives of IGNOU, conspicuous among them being the creation of eGyanKosh, the digital repository of the learning materials of IGNOU. Nevertheless, majority of the academic programmes are not being provided audio video supports. The paper analyses the application of electronic media in IGNOU’s course delivery platform.

End-user Acceptance of Online Shopping Sites in India

OpenAIRE

Bolar K; Shaw B

2015-01-01

Online shopping sites have recently gained momentum in India. Since the ecommerce industry is in infancy state, customer (end user) satisfaction with the online shopping is the prime concern because decreasing customer satisfaction leads to negative electronic word of mouth (eWOM) which is very severe for the business. Through a dataset gathered from 127 online shopping customers in with respect to online shopping sites in India, this study investigates the role of website quality, informatio...

Evolution of Swarna estuary and its impact on braided islands and estuarine banks, Southwest coast of India

Digital Repository Service at National Institute of Oceanography (India)

AvinashKumar; Jayappa, K.S.; Vethamony, P.

Qualitative and quantitative evolution of the Swarna estuary, Karnataka, India during the past 38 years (1967–2005), has been analysed by integrating the results of field surveys, satellite images, hydrodynamic modelling and topographic data in GIS...

Influence of upwelling induced near shore hypoxia on the Alappuzha mud banks, South West Coast of India

Digital Repository Service at National Institute of Oceanography (India)

GireeshKumar, T.R.; Mathew, D.; Pratihary, A.K.; Naik, H.; Narvekar, K.U.; Araujo, J.; Balachandran, K.K.; Muraleedharan, K.R.; Thorat, B.R.; Nair, M.; Naqvi, S.W.A.

The results of the first time-series measurements spanning 18-weeks (22 April to 20 September 2014) from a coastal environment (Alappuzha, southwest India), where two process of upwelling and mud banks are concurrent during summer monsoon...

Cytogenetic studies in green mussel, Perna viridis (Mytiloida: Pteriomorphia), from West Coast of India

Digital Repository Service at National Institute of Oceanography (India)

Iqbal, A.N.M.Z.; Khan, M.S.; Goswami, U.

species belonging to Pulmonate Communicated by S.W.A. Naqvi. A. N. Muhammed Zafar Iqbal (&) C1 M. S. Khan C1 U. Goswami Biological Oceanography Division, National Institute of Oceanography, Dona Paula, Goa, India e-mail: zafar_ian@yahoo.co.uk; zafarin... aquaculture productivity, with annual yield of 3,22,234 tonnes in 2004 (FAO 2004) and holds the 19th position in the worldwide mariculture industry. Karyotypic features have been analyzed and documented in detail using con- ventional staining, C-banding and Ag...

Waste electrical and electronic equipment management and Basel Convention compliance in Brazil, Russia, India, China and South Africa (BRICS) nations.

Science.gov (United States)

Ghosh, Sadhan Kumar; Debnath, Biswajit; Baidya, Rahul; De, Debashree; Li, Jinhui; Ghosh, Sannidhya Kumar; Zheng, Lixia; Awasthi, Abhishek Kumar; Liubarskaia, Maria A; Ogola, Jason S; Tavares, André Neiva

2016-08-01

Brazil, Russia, India, China and South Africa (BRICS) nations account for one-quarter of the world's land area, having more than 40% of the world's population, and only one-quarter of the world gross national income. Hence the study and review of waste electrical and electronic equipment management systems in BRICS nations is of relevance. It has been observed from the literature that there are studies available comparing two or three country's waste electrical and electronic equipment status, while the study encompassing the BRICS nations considering in a single framework is scant. The purpose of this study is to analyse the existing waste electrical and electronic equipment management systems and status of compliance to Basel convention in the BRICS nations, noting possible lessons from matured systems, such as those in the European Union EU) and USA. The study introduced a novel framework for a waste electrical and electronic equipment management system that may be adopted in BRICS nations and revealed that BRICS countries have many similar types of challenges. The study also identified some significant gaps with respect to the management systems and trans-boundary movement of waste electrical and electronic equipment, which may attract researchers for further research. © The Author(s) 2016.

Distribution of mercury in a tropical estuary (India) situated near a chloro-alkali plant

OpenAIRE

Gouda, Rajashree; Panigrahy, R.C.

1995-01-01

The distribution of mercury in water, sediment and some biological samples of the Rushikulya estuary, east coast of India were assessed during Jan-Dec. 1989. Both the dissolved plus acid leachable mercury contents in water and the sediment mercury discerned conspicuous spatial and seasonal fluctuations. Adsorption on to the suspended particulates was found to be the most likely mechanism for removal of mercury from the water column. Exchange of mercury from sediments to water was observed at ...

Stone anchors (composite type) from the Saurshtra coast, India: An indicator of ancient ports and sea routes

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A.S.; Sundaresh; Tripati, S.

Marine archaeological investigations on the Saurashtra coast specially at Dwarka, Bet Dwarka, Armada and Somnath brought to light a large number of stone anchors of various type which include composite, grapnel and ring-stone types. The present...

Effect of submarine canyons on tsunami heights, currents and run-up off the southeast coast of India

Digital Repository Service at National Institute of Oceanography (India)

JayaKumar, S.; ManiMurali, R.; Baldock, T.E.

Tsunami numerical model studies are mostly focused on inundation and run-up onto the coast. Fewer studies have been aimed at investigating role of submarine canyons on the tsunami heights, currents and run-up. The influence of submarine canyons...

Protective role of coastal ecosystems in the context of the tsunami in Tamil Nadu coast, India: Implications for hazard preparedness

Digital Repository Service at National Institute of Oceanography (India)

Mascarenhas, A.; Jayakumar, S.

of society bears the recurring loss of humans, livestock and property. Prudent development of coasts is the obvious solution. The inherent benefits offered by a functional sea front have to be considered for a sustainable management of hazard-prone coasts... and high dunes act as efficient dissipaters of wave energy. Sand dunes therefore serve as stores that strong waves draw on during extreme events. Society at large is immensely benefitted. The role played by sand dunes and beach gradients during the tsunami...

An evaluation of major placer minerals along the Valinokkam - Tuticorin coast, southern Tamil Nadu, India

Digital Repository Service at National Institute of Oceanography (India)

Cherian, A.; Chandrasekar, N.; Rajamanickam, G.V.; Gujar, A.R.

scientific advancements. The recent liberalisations of economic measures by the government of India and the exemption of certain minerals from the purview of mineral act have greatly enhanced the market potential of natural resources. Many private... of its resistive nature to rutile conversion. If the ilmenite along the study area is susceptible to rutile conversion, this material can be exploited and put up for sale in the market in the form of synthetic rutile. The separation of ilmenite...

The impact of dredging on residence time in the Amba estuary, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Velamala, S.N.; Thomas, J.; Bari, S.; Kachave, S.

for the Musa estuary (Persian Gulf), Payandeh, Zaker and Niksokhan (2014) showed that the persistency of currents was a useful indicator for identifying areas of pollutant load accumulation. The RTs have also been studied by several authors (e.g. Luff....W.A Naqvi, Director, National Institute of Oceanography, India, for their constant encouragement and support during the work. Authors would also like to express their gratitude to Lisa V. Lucas, Geological Survey, US for her comments on this manuscript...

Coast Guard

International Nuclear Information System (INIS)

1991-09-01

The 11-million gallon Exxon Valdez oil spill highlighted deficiencies in the nation's ability to contain and recover spilled oil. The Oil Pollution Act of 1990 represents a major effort by Congress to address these deficiencies and to clarify the roles and responsibilities of the private sector and the federal government in preventing, preparing for, and responding to oil spills. This report examines the Coast Guard's efforts to avoid unnecessary and wasteful duplication by coordinating with the private sector and others, including federal and state agencies, its plans to buy oil spill response equipment and the new responsibilities the act places on the private sector and the Coast Guard and if these responsibilities call for a shift in emphasis in Coast Guard oil spill response activities

Atmospheric forcing on the seasonal variability of sea level at Cochin, southwest coast of India

Digital Repository Service at National Institute of Oceanography (India)

Srinivas, K.; DineshKumar, P.K.

met-ocean parameters with observed sea level at Cochin, using long term time series data. Forty percent of the variance in the interannual sea level was accounted for by the along-shore wind stress. Statistical modelling of the monthly mean sea... level at fifteen different stations along the west and east coasts of the Indian subcontinent was attempted by Srinivas et al. (2005a) using autoregressive, sinusoidal and EWMA techniques. They also described in detail, statistics pertaining...

Non-Formal Education--A Worthwhile Alternative to the Formal Education in India? Case Studies from Ganjam, Orissa. Reprints and Miniprints, No. 757.

Science.gov (United States)

Svensson, Anna

This report discusses the advantages and disadvantages of non-formal education (NFE) compared to the formal school system in Ganjam, a rural district on the east coast of Orissa, India. The aim of the research was to investigate whether or not NFE, would be a worthy target of aid from the Swedish aid organization SIDA (Swedish International…

Oceanographic studies off Beypore Port, west coast of India to locate a dredge dumping site

Digital Repository Service at National Institute of Oceanography (India)

DineshKumar, P.K.; Vethamony, P.; Babu, M.T.; Srinivas, K.; Thottam, T.J.

with a frequency of occurrence of the order of 2%. 4.4. CURRENTS Measurements of currents were made at 3 locations as shown in Figure 6 using re- cording current meters manufactured by Aanderaa Instruments, Norway and details of these measurements... – Part I, Office of the Geodetic and Research Branch, Surveyor Gen. of India, Dehradun, 238 p. Arakawa, A.: 1966, ‘Computational design for a long term numerical integration of the equations of fluid motion: Two dimensional incompressible flow. Part I’, J...

Present Status of Intertidal Biodiversity in and around Mumbai (West Coast of India

Directory of Open Access Journals (Sweden)

Balasaheb Kulkarni

2017-03-01

Full Text Available During the present investigation, Girgaon, Marine Drive, Haji Ali and Gorai Creek in Mumbai were selected for biodiversity assessment following a protocol for natural geography in shore areas. Fifty nine macrobenthic molluscs, arthropods, coelenterates and echinoderms at these sites were recorded. The maximum density of gastropods and clams was observed at Marine Drive shore. At Gorai Creek, there were plentiful Telescopium telescopium, Potamidus cingulatis, mudskipper and fiddler crabs. Studies shows that the biodiversity status of the selected sites varies with respect to location, type of substratum and season. Pollution was observed to have a noticeable effect on clams at Girgaon coast, where many Paphia textile shells were observed to be filled with mud and coated with black colour.

EFFECTS OF MEDU AND COASTAL TOPOGRAPHY ON THE DAMAGE PATTERN DURING THE RECENT INDIAN OCEAN TSUNAMI ALONG THE COAST OF TAMILNADU

Directory of Open Access Journals (Sweden)

J.P. Narayan

2005-01-01

Full Text Available Effects of Medu (naturally elevated landmass very close to the seashore and elongated parallel to the coast and coastal topography on the damage pattern during the deadliest Indian Ocean tsunami of December 26, 2004 is reported. The tsunami caused severe damage and claimed many victims in the coastal areas of eleven countries bordering the Indian Ocean. The damage survey revealed large variation in damage along the coastal region of Tamilnadu (India.The most severe damage was observed in the Nagapattinam district on the east coast and the west coast of Kanyakumari district. Decrease of damage from Nagapattinam to Kanchipuram district was observed. Intense damage again appeared to the north of Adyar River (from Srinivaspuri to Anna Samadhi Park. Almost, no damage was observed along the coast of Thanjavur, Puddukkotai and Ramnathpuram districts in Palk Strait, situated in the shadow zone of Sri Lanka.It was concluded that the width of continental shelf has played a major role in the pattern of tsunami damage. It was inferred that the width of the continental shelf and the interference of reflected waves from Sri Lanka and Maldives Islands with direct waves and receding waves was responsible for intense damage in Nagapattinam and Kanyakumari districts, respectively. During the damage survey authors also noted that there was almost no damage or much lesser damage to houses situated on or behind the Medu. Many people observed the first arrival. The largest tsunami amplitude occurred as the first arrival on the eastern coast and in the second arrival on the western coast.

Bacterial Diversity Associated with Cinachyra cavernosa and Haliclona pigmentifera, Cohabiting Sponges in the Coral Reef Ecosystem of Gulf of Mannar, Southeast Coast of India.

Directory of Open Access Journals (Sweden)

C Jasmin

Full Text Available Sponges are abundant, diverse and functionally important organisms of coral reef ecosystems. Sponge-associated microorganisms have been receiving greater attention because of their significant contribution to sponge biomass, biogeochemical cycles and biotechnological potentials. However, our understanding of the sponge microbiome is limited to a few species of sponges from restricted geographical locations. Here, we report for the first time the bacterial diversity of two cohabiting sponges, viz. Cinachyra cavernosa and Haliclona pigmentifera, as well as that in the ambient water from the coral reef ecosystems of the Gulf of Mannar, located along the southeast coast of India. Two hundred and fifty two clones in the 16S rRNA gene library of these sponges were grouped into eight distinct phyla, of which four belonged to the core group that are associated only with sponges. Phylogenetic analysis of the core bacteria showed close affinity to other sponge-associated bacteria from different geographical locations. γ-Proteobacteria, Chloroflexi, Planctomycetes and Deferribacter were the core groups in C. cavernosa while β and δ-Proteobacteria performed this role in H. pigmentifera. We observed greater OTU diversity for C. cavernosa (Hǀ 2.07 compared to H. pigmentifera (Hǀ 1.97. UniFrac analysis confirmed the difference in bacterial diversity of the two sponge species and also between the sponges and the reef water (p<0.001. The results of our study restate the existence of a host driven force in shaping the sponge microbiome.

Probability Distributions for Cyclone Key Parameters and Cyclonic Wind Speed for the East Coast of Indian Region

Directory of Open Access Journals (Sweden)

Pradeep K. Goyal

2011-09-01

Full Text Available This paper presents a study conducted on the probabilistic distribution of key cyclone parameters and the cyclonic wind speed by analyzing the cyclone track records obtained from India meteorological department for east coast region of India. The dataset of historical landfalling storm tracks in India from 1975–2007 with latitude /longitude and landfall locations are used to map the cyclone tracks in a region of study. The statistical tests were performed to find a best fit distribution to the track data for each cyclone parameter. These parameters include central pressure difference, the radius of maximum wind speed, the translation velocity, track angle with site and are used to generate digital simulated cyclones using wind field simulation techniques. For this, different sets of values for all the cyclone key parameters are generated randomly from their probability distributions. Using these simulated values of the cyclone key parameters, the distribution of wind velocity at a particular site is obtained. The same distribution of wind velocity at the site is also obtained from actual track records and using the distributions of the cyclone key parameters as published in the literature. The simulated distribution is compared with the wind speed distributions obtained from actual track records. The findings are useful in cyclone disaster mitigation.

Shoreline changes during the last 2000 years on the Saurashtra coast of India: Study based on archaeological evidences

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A.S.; Vora, K.H.; Sundaresh

. In this communication an attempt is made to study shoreline and sea-level changes during the last 2000 years on the basis of archaeological evidence. Archaeological excavations undertaken at Bet Dwarka (western most part of India) revealed an interesting cultural...

Longshore currents and associated sediment transport in the nearshore areas of Kerala and Goa, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Murty, C.S.; Veerayya, M.

The field observations on the longshore currents at selected locations along the coasts of Goa and Kerala on the western seaboard spanning over a period of five years revealed high variability in their direction and speed. The currents...

Monsoon-induced changes in the size-fractionated phytoplankton biomass and production rate in the estuarine and coastal waters of southwest coast of India.

Science.gov (United States)

Madhu, N V; Jyothibabu, R; Balachandran, K K

2010-07-01

Changes in the autotrophic pico- (0.2-2 microm), nano- (2-20 microm), and microplankton (>20 microm) biomass (chlorophyll a) and primary production were measured in the estuarine and coastal waters off Cochin, southwest coast of India during the onset and establishment of a monsoon. During this period, the estuary was dominated by nutrient-rich freshwater, whereas the coastal waters were characterized with higher salinity values (>30 psu) and less nutrients. The average surface chlorophyll a concentrations and primary production rates were higher in the estuary (average 13.7 mg m(-3) and 432 mgC m(-3) day(-1)) as compared to the coastal waters (5.3 mg m(-3) and 224 mgC m(-3) day(-1)). The nanoplankton community formed the major fraction of chlorophyll a and primary production, both in the estuary (average 85 +/- SD 8.3% and 81.2 +/- SD 3.2%) and the coastal waters (average 73.2 +/- SD 17.2% and 81.9 +/- 15.7%). Nanoplankton had the maximum photosynthetic efficiency in the coastal waters (average 4.8 +/- SD 3.9 mgC mgChl a m(-3) h(-1)), whereas in the estuary, the microplankton had higher photosynthetic efficiency (average 7.4 +/- 7 mgC mgChl a m(-3) h(-1)). The heavy cloud cover and increased water column turbidity not only limit the growth of large-sized phytoplankton in the Cochin estuary and coastal waters but also support the proliferation of nanoplankton community during the monsoon season, even though large variation in nanoplankton chlorophyll a and production exists between these two areas.

First record of the silver-cheeked toad fish Lagocephalus scleratus (Gmelin, 1789 (Actinopterygii: Tetraodontidae from Chennai coastal waters, Southeast India

Directory of Open Access Journals (Sweden)

Krishnan Silambarasan

2017-04-01

Full Text Available The silver-cheeked toad fish, Lagocephalus scleratus, was recorded for the first time on 25 September 2014. Two specimens of this fish species were collected from the by-catch landed by a commercial deep-sea trawler at Kasimedu Fishing Harbour, Chennai coast, Southeast India. The morphometric and meristic characters of the recorded specimens are described and discussed. The specimen was compared with earlier reports.

Population genetic structure of skipjack tuna Katsuwonus pelamis from the Indian coast using sequence analysis of the mitochondrial DNA D-loop region

Digital Repository Service at National Institute of Oceanography (India)

Menezes, M.R.; Kumar, G.; Kunal, S.P.

Biology (2012) 80, 2198–2212 doi:10.1111/j.1095-8649.2012.03270.x, available online at wileyonlinelibrary.com Population genetic structure of skipjack tuna Katsuwonus pelamis from the Indian coast using sequence analysis of the mitochondrial DNA D...-loop region M. R. Menezes*, G. Kumar and S. P. Kunal Biological Oceanography Division, National Institute of Oceanography (CSIR), Dona Paula, Goa 403 004, India (Received 26 May 2011, Accepted 14 February 2012) Genetic structure of skipjack tuna Katsuwonus...

Location of marine outfall and design of diffuser for a shore based industry off southeast coast of India

Digital Repository Service at National Institute of Oceanography (India)

Chandramohan, P.; SanilKumar, V.; Ilangovan, D.; Jayakumar, S.

stratification and seabed bathymetry have to be collected. This paper describes the approach and methodology adopted for designing a effulent disposal system for a chemical industry at southeast Tamil Nadu Coast. Effluent discharged at 200 m sup(3)/hr for 9...

Scanning electron microscope

International Nuclear Information System (INIS)

Anon.

1980-01-01

The principle underlying the design of the scanning electron microscope (SEM), the design and functioning of SEM are described. Its applications in the areas of microcircuitry and materials science are outlined. The development of SEM in India is reviewed. (M.G.B.)

Clay mineral distribution in the continental shelf sediments from Krishna to Ganges river mouth, east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Rao, V.P.

Ninety six sediment samples (less than 2 mu m fractions) of the eastern continental shelf of India between Ganges in the north and Krishna in the south have been studiEd. by X-ray diffraction. On the basis of nature and abundance of different clay...

Tunneling of electrons through semiconductor superlattices

Indian Academy of Sciences (India)

Unknown

Tunneling of electrons through semiconductor superlattices. C L ROY. Department of Physics and Meteorology, Indian Institute of Technology, Kharagpur 721 302, India. Abstract. The purpose of the present paper is to report a study of tunneling of electrons through semicon- ductor superlattices (SSL); specially, we have ...

Identification and characterization of tsunami deposits off southeast coast of India from the 2004 Indian Ocean tsunami: Rock magnetic and geochemical approach.

Digital Repository Service at National Institute of Oceanography (India)

Veerasingam, S.; Venkatachalapathy, R.; Basavaiah, N.; Ramkumar, T.; Venkatramanan, S.; Deenadayalan, K.

to find the relationships among the sediment texture, mineral, geochemical, and rock-magnetic param- eters in sediments using Statistical Package for the Social Sciences (SPSS) and Minitab softwares, respectively. 4. Results and discussion 4.1 Sediment... Deenadayalan4 1CSIR – National Institute of Oceanography, Dona Paula, Goa 403 004, India. 2Department of Physics, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India. 3Faculty of Marine Sciences, Annamalai University, Parangipettai 608 502, Tamil...

Seasonal variation in biomass and species composition of seaweeds stranded along Port Okha, northwest coast of India

Science.gov (United States)

Thakur, Mukund C.; Reddy, C. R. K.; Jha, Bhavanath

2008-06-01

Port Okha coast, which is known for its luxuriant growth of a diverse assemblage of seaweeds on Saurashtra coast, is found to have abundant quantities of seaweeds being drifted and washed ashore every year. Studies conducted for quantifying the stranded seaweeds from May 2004 to April 2005 showed an average biomass value of 3.10 kg fresh wt/m2/month with maximum being 6.60 kg fresh wt/m2 in April. The stranded weeds constituted a total of 62 species during the entire study period. Of this, Rhodophyta ranked high with 26 species followed by Chlorophyta with 22 species and Phaeophyta with 14 species. The stranded seaweeds that were washed ashore provide valuable floristic information about the intertidal and near shore sub-tidal algae of the respective regions. Although natural senescence of seaweeds is one of the major factors, strong currents primarily forced by tides, also contribute to the uprooting and subsequent drifting of seaweeds on to the beach. This ultimately causes changes in floristic features of the existing algal beds.

Soil to rice transfer factors for 210Pb: a study on rice grown in India

International Nuclear Information System (INIS)

Karunakara, N.; Rao, Chetan; Ujwal, P.; Yashodhara, I.; Sudeep Kumara; Somashekarappa, H.M.; Bhaskara Shenoy, K.; Ravi, P.M.

2013-01-01

India is the second largest producer of rice (Oryza sativa L.) in the world and rice is the essential component of the diet for the majority of the population of India. However, detailed studies aimed at evaluation of radionuclide transfer factors (F v ) for rice grown in India are almost non-existent. This paper presents soil to rice transfer factors for 210 Pb for rice grown in natural field conditions on the West Coast of India. A rice field was developed very close to the Kaiga nuclear power plant for the field studies. For a comparative study of radionuclide transfer factors, rice samples were also collected from the rice fields of nearby villages. The soil to un-hulled rice grain 210 Pb varied in the range <1.2 x10 -2 to 8.1 x 10 -1 with a mean of 1.4 x 10 -1 . The mean values of un-hulled grain to white rice processing retention factors (F r ) was 0.03 for 210 Pb. Using the processing retention factors the soil to white rice transfer factor was estimated and found to have the mean value of 4.2 x 10 -3 . The study has shown that the transfer of 210 Pb was retained in the root and its transfer to above ground organs of rice plant is significantly lower. (author)

Run-up and inundation limits along southeast coast of India during the 26 December 2004 Indian Ocean tsunami

Digital Repository Service at National Institute of Oceanography (India)

Jayakumar, S.; Ilangovan, D.; Naik, K.A .; Gowthaman, R.; Tirodkar, G.; Naik, G.N.; Ganesan, P.; ManiMurali, R.; Michael, G.S.; Raman, M.V.; Bhattacharya, G.C.

protected by coastal dunes, had higher inundation values compared to places where the coast is protected by dunes. Also, wherever there are openings in the du nes (either due to anthropogenic acti v ity or due to other reasons), inund a tion...

Response of coastal vegetation and the need for green belts along the Tamil Nadu coast, India: The December 2004 tsunami experience

Digital Repository Service at National Institute of Oceanography (India)

Mascarenhas, A.

in coastal areas as protective shield against the tsunami. An amount of Rupees 648 lakhs has been allocated in 2006. It has also been proposed to cover the remaining parts of the coast with a bio-shield in phased manner, for which a proposal costing about... of trees effectively reduces the force of devastating storm surges and waves; (d) Trees are beneficial for biodiversity and can induce habitats for wild life (Clark, 1996); (e) People inhabiting hazard prone coasts would benefit from green belts in terms...

Glacial to Holocene fluctuations in hydrography and productivity along the southwestern continental margin of India

Digital Repository Service at National Institute of Oceanography (India)

Thamban, M.; Rao, V.P.; Schneider, R.R.; Grootes, P.M.

was highly reduced (S.W.A. Naqvi, personal communication). during 13–6 ka BP, when the intensity of summer Secondly, the dynamics of the upwelling system monsoon is expected to be high. We suggest that along the southwest coast of India oVers an past changes...: S0031-0182(00)00156-5 114 M. Thamban et al. / Palaeogeography, Palaeoclimatology, Palaeoecology 165 (2001) 113–127 during the early to mid-Holocene period, following and Malmgren, 1996; Naqvi and Fairbanks, 1996; Overpeck et al., 1996; Zonneveld et...

Current status of electron beam processing applications and accelerator technology in India

International Nuclear Information System (INIS)

Sarma, K.S.S.; Lavale, D.S.; Sabharwal, S.

2001-01-01

Full text: Electron Beam (EB) processing is now a well established technology world over in a few specific sections of the industry, particularly the polymer industry. The actual use of the technology however is dependent upon the specific socioeconomic needs of the individual country. In India, an industrial type EB accelerator has been operative since 1988 at Bhabha Atomic Research Centre, Mumbai. This 2 MeV, 20 kW machine is being utilized to develop and optimize process and material process techniques for research, development and industry in the fields viz., crosslinking, degradation and grafting of polymers; color enhancement in precious and semi-precious stones, lifetime control in semi-conductor devices; food irradiation. Some of these processes have developed into products that are now being carried out on regular commercial basis, meeting the requirements of the Indian industry. These include crosslinked high temperature PE 'O' rings, wire and cable insulation, heat shrinkable tubes; micro-fine PTFE powder, degraded viscose rayon pulp and color diamonds, With the collaboration of Indian cable industry, EB crosslinkable insulation formulations were developed. Suitable irradiation parameters and techniques have been studied, optimized and standardized. Over 100 km length of cables based on PE, PVC and elastomer blends has been irradiated and the results were found to be very encouraging. Since the main parameters to be monitored in the radiation processing is the absorbed dose and its uniformity in the product, dose evaluation and optimization hb been carried out specific to the process and the product under treatment. EB dosimetry based on the graphite calorimetry, thin film and alanine powder dosimeters has been standardized and being used in the facility for dose evaluation and optimization studies. An endless stainless steel mesh conveyor is available in the facility to carry out product irradiation. An eight type cable irradiation gadget has been

A one year comparison of radar and pressure tide gauge at Goa, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Mehra, P.; Desai, R.G.P.; Joseph, A.; VijayKumar, K.; Agarvadekar, Y.; Luis, R.; Sundar, D.; Viegas, B.

is essential for wide variety of practical (e.g. engineering, navigation, risk to coastal areas, defense etc) and scientific applications. Considering the historically known vulnerability of the Indian coasts to storm surges (Joseph and Prabhudesai, 2005..., which required knowledge of atmospheric pressure (in case of absolute pressure sensor), seawater density and gravitational acceleration to make the conversion from pressure to sea level. In spite of the above lacuna, the instruments have many practical...

Occurrence of polycyclic aromatic hydrocarbons (PAHs in beached plastic pellets from Mumbai coast, India

Directory of Open Access Journals (Sweden)

HB Jayasiri

2014-06-01

Full Text Available PAHs are a class of ubiquitous pollutants which consist of two or more fused benzene rings in various arrangements. A number of PAH compounds are known carcinogens and bioaccumulate and biomagnify. These compounds originate naturally as well as anthropogenically through oil spills, incineration of waste and combustion of fossil fuels and wood. The environmental consequence of Plastic pellets is the sorption organic pollutants on their surface from the sea surface microlayer (SML where the hydrophobic contaminants are known to be enriched. The plastic pellets were collected along the recent high tide line from four beaches of Mumbai coast bimonthly during May 2011 - March 2012. A total of 72 pools of plastic pellets were extracted, fractionated and analysed by Gas Chromatograph coupled to a mass spectrometer to evaluate the extent and sources of 16 PAHs. The mean ΣPAH concentration in pellets was 9202.30±114.89 ng g-1 with a wide range (35.4-46191.58 ng g-1. The concentration of fluorene was found to be the highest (1606.30±251.54 ng g-1 followed by anthracene, chrysene and phenanthrene. The ΣPAH concentration was significantly varied among months and there was no significant difference among sites at  p=0.05. The 2-3 aromatic ring compounds accounted for 60% of the total PAHs in pellets of Mumbai coast while 4 rings and 5-6 rings compounds accounted for 26 and 14%, respectively. The ratio of low and high molecular weight PAHs indicated that the contamination by petrogenic sources was predominant over the pyrogenic ones in plastic pellets suggesting oil pollution in coastal area of Mumbai.Keywords: plastic pellets, PAHs, Mumbai, sources

Contamination of organochlorine pesticides in sediments from the Arabian Sea along the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Sarkar, A.; Nagarajan, R.; Chaphadkar, S.; Pal, S.; Singbal, S.Y.S.

are the least 1983, 1984, 1987; Tanabe and Tatsukawa, 1980). A soluble in water but show a high affinity for different broad spectrum of pesticides is used in India for surface including particulate matter. Smaller particles agriculture as well as vector... ................................................................. average 300MT of aldrin, 6000MT of BHC, 15 ................................................ 10,000 MT of DDT are being used every year for 10 , , - . .......... ~ agricultural and domestic purposes (Bami, 1992). The o extent of contamination of coastal...

77 FR 66577 - Fisheries Off West Coast States; Pacific Coast Groundfish Fishery; Trawl Rationalization Program...

Science.gov (United States)

2012-11-06

...-XC165 Fisheries Off West Coast States; Pacific Coast Groundfish Fishery; Trawl Rationalization Program... implemented as part of the trawl rationalization program. FOR FURTHER INFORMATION CONTACT: Jamie Goen, phone..., NMFS implemented a trawl rationalization program, a catch share program, for the Pacific coast...

Development of microtron in India

International Nuclear Information System (INIS)

Soni, H.C.

1999-01-01

The accelerator called microtron finds vast applications, in the areas of research, medicine and industry, which need electron beam in the energy range of a few tens of MeV. This paper describes the history of development of microtron in the world and in India. It gives the details of microtrons developed at the Centre for Advanced Technology. The paper also highlights the microtron based equipment, like radiotherapy machine and radiation processing unit, under development at CAT. (author)

Longshore sediment transport along the Indian coast

Digital Repository Service at National Institute of Oceanography (India)

Chandramohan, P.; Nayak, B.U.

Coast. Maharashtra Coast and the part between Pondicherry and Point Calimere in Tamilnadu, show negligible order of annual net transport. Annual net transport along the east coast is in north and along the west coast in south but for South Gujarat Coast....

Coast Guard Compass

Science.gov (United States)

looks on as Adm. Charles Ray thanks Adm. Chuck Michel for his service as the 30th vice commandant of the commandant Adm. Charles W. Ray relieved Adm. Charles D. Michel as vice commandant of the U.S. Coast Guard by . Following graduation and commissioning as an officer in the Coast Guard, Wright will be heading to the

Zircon and ilmenite from the beach placers of southern coast of Tamil Nadu, east coast of India

International Nuclear Information System (INIS)

Angusamy, N.; Rajamanickam, G.V.; Loveson, V.J.

2004-01-01

Zircons were studied from the two different zones of enrichment of placer deposits namely, Kanyakumari-Kuttankuli (KK) and Kallar-Vaippar (VP) along the southern coast of Tamil Nadu. The average heavy mineral contents were 67 wt % for KK and 64 wt % in VP region. The heavy mineral assemblage of the two zones were akin to each other. However, monazite was present in the KK region. In KK, zircons were rounded (44.5 - 63.2 %), overgrown (4.1-16 %), and euhedral (9-4.9 %) while in VP, they are largely broken (47.8-59.6 %), rounded (22.2-38.9 %), and euhedral (7.3-8.1 %). Mean length and breadth of zircons of KK and VP ranged from 0.22-0.26 mm and 0.07-0.13 mm and, 0.06 - 0.16 mm and 0.07-0.11 mm, respectively. Zircons of VP are more fine-grained and well-rounded than KK. The northerly currents, in the Gulf of Mannar, must have transported and deposited the heavy minerals due to the inflection of coastline, and downwarped basinal structure. REE pattern of zircons exhibit Eu and Ce anomalies which could be explained only in terms of crystallochemical factors and the bulk compositional differences of the melt. In the study area, abundance of rounded zircons, length/breadth (L/B) ratios, reduced major axis (RMA) angles, indicated that the source rock for zircons must have been primarily of charnockites. The distribution, composition and REE content of zircons compare well with that of other countries where it is currently under exploitation. (author)

Microhyla laterite sp. nov., A New Species of Microhyla Tschudi, 1838 (Amphibia: Anura: Microhylidae from a Laterite Rock Formation in South West India.

Directory of Open Access Journals (Sweden)

K S Seshadri

Full Text Available In recent times, several new species of amphibians have been described from India. Many of these discoveries are from biodiversity hotspots or from within protected areas. We undertook amphibian surveys in human dominated landscapes outside of protected areas in south western region of India between years 2013-2015. We encountered a new species of Microhyla which is described here as Microhyla laterite sp. nov. It was delimited using molecular, morphometric and bioacoustics comparisons. Microhyla laterite sp. nov. appears to be restricted to areas of the West coast of India dominated by laterite rock formations. The laterite rock formations date as far back as the Cretaceous-Tertiary boundary and are considered to be wastelands in-spite of their intriguing geological history. We identify knowledge gaps in our understanding of the genus Microhyla from the Indian subcontinent and suggest ways to bridge them.

Nuclear India. Vol. II. [India's nuclear policy

Energy Technology Data Exchange (ETDEWEB)

Jain, J P

1974-01-01

The book contains 186 documents on India's nuclear policy covering a period from November 1948 to May 1974. It thus forms a comprehensive documentary account of India's nuclear policy. They include: texts of India's agreements for cooperation on the peaceful uses of atomic energy with the USA and Canada, the summary conclusions of India's atomic energy program for the decade 1970-80, the resolutions and amendments moved by India, the communications sent and the statements made by Indian representatives in various international forums--the conference of the IAEA statute, the Annual General Conference of the IAEA and its committees and the Board of Governors, the UN General Assembly and its First Committee, the conference of the Committee on Disarmaments etc. It also contains texts or extracts from the papers presented, statements made, and addresses and talks delivered by H. J. Bhabha, V. A. Sarabhai, H. N. Sethna and other eminent scientists at the international conferences on the peaceful uses of atomic energy, IAEA discussions on PNE, etc. Policy statements by India's Prime Ministers Nehru, Shastri and (Mrs.) Gandhi, and Foreign Ministers Chagla and Swaran Singh, made from time to time in the Lok Sabha and the Rajya Sabha--the two houses of the Indian parliaments--are also included. The sources of these documents are listed at the end. (MCB)

Seasonal changes of the sediment size distribution and stability along the beaches of Kerala, south west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Sajeev, R.; Sankaranarayanan, V.N.; Chandramohan, P.; Nampoodiripad, K.S.N.

Mean grain size distribution under different environmental conditions along the coast of Kerala showed considerable spatial variation (0.14-0.96 mm). Standard deviation values indicated a very well sorted class along all the beaches with a lowest...

Extensional Tectonics and Sedimentary Architecture Using 3-D Seismic Data: An Example from Hydrocarbon-Bearing Mumbai Offshore Basin, West Coast of India

Science.gov (United States)

Mukhopadhyay, D. K.; Bhowmick, P. K.; Mishra, P.

2016-12-01

In offshore sedimentary basins, analysis of 3-D seismic data tied with well log data can be used to deduce robust isopach and structure contour maps of different stratigraphic formations. The isopach maps give depocenters whereas structure contour maps give structural relief at a specific time. Combination of these two types of data helps us decipher horst-graben structures, sedimentary basin architecture and tectono-stratigraphic relations through Tertiary time. Restoration of structural cross sections with back-stripping of successively older stratigraphic layers leads to better understand tectono-sedimentary evolution of a basin. The Mumbai (or Bombay) Offshore Basin is the largest basin off the west coast of India and includes Bombay High giant oil/gas field. Although this field was discovered in 1974 and still producing, the basin architecture vis-à-vis structural evolution are not well documented. We take the approach briefly outlined above to study in detail three large hydrocarbon-bearing structures located within the offshore basin. The Cretaceous Deccan basalt forms the basement and hosts prodigal thickness (> 8 km at some localities) of Tertiary sedimentary formations.A two stage deformation is envisaged. At the first stage horst and graben structures formed due to approximately E-W extensional tectonics. This is most spectacularly seen at the basement top level. The faults associated with this extension strike NNW. At the second stage of deformation a set of ENE-striking cross faults have developed leading to the formation of transpressional structures at places. High rate of early sedimentation obliterated horst-graben architecture to large extent. An interesting aspect emerges is that the all the large-scale structures have rather low structural relief. However, the areal extent of such structures are very large. Consequently, these structures hold commercial quantities of oil/gas.

A multivariate statistical study with a factor analysis of recent planktonic foraminiferal distribution in the Coromandel Coast of India

Digital Repository Service at National Institute of Oceanography (India)

Jayalakshmy, K.V.; Rao, K.K.

A study of planktonic foraminiferal assemblages from 19 stations in the neritic and oceanic regions off the Coromandel Coast, Bay of Bengal has been made using a multivariate statistical method termed as factor analysis. On the basis of abundance...

Accumulation of sediment, organic matter and trace metals with space and time, in a creek along Mumbai coast, India

Digital Repository Service at National Institute of Oceanography (India)

Fernandes, L.; Nayak, G.N.; Ilangovan, D.; Borole, D.V.

Two core sediment samples; one from inner part (ManI) and the other closer to the mouth (ManII; were collected from the intertidal regions of Manori, a tidally influenced creek near Mumbai, India. Both the cores were subjected to various geochemical...

AREVA in India

International Nuclear Information System (INIS)

2008-01-01

India is the sixth largest energy consumer in the world and its demand is rising rapidly. To support its economic growth, estimated to be 8% on average over the last three years and to ensure access to electricity for all, the country foresees massive investments in its power sector over the next five years. India is therefore an essential market for the AREVA Group, where its Transmission and Distribution division plays a leading role on the strategic grid modernization market. This document presents: 1 - the economic situation in India: Key figures, Growth, India's growing need for electricity, India's energy sources and policy: current mix, driving role of the State, the financial reorganization of the SEBs, the 'Mega-Power' projects, the electricity act, the rural electrification program, the Investments. 2 - Civil nuclear energy: a strong potential for development; 3 - India's transmission and distribution network: the power challenge of the transmission network, the efficiency challenge of the distribution network. 4 - AREVA T and D in India: AREVA T and D profile, Areva's presence in India, market share, T and D customers and flagship projects

Coast Live Oak Thinning Study in the Central Coast of California

Science.gov (United States)

Norman H. Pillsbury; Michael J. DeLasaux; Timothy R. Plumb

1987-01-01

Abstract: Along-term thinning study was established in ten stands of coast live oak (Quercus agrifolia N in the Central Coast of California. Information about diameter, basal area, and volume growth and yield is being obtained from unthinned control plots and from plots thinned to 50 and 100 square feet of basal area per acre. Descriptive information was also collected...

NOAA Electronic Navigational Charts (ENC)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — The Office of Coast Survey (OCS) has been involved in the development of a NOAA Electronic Navigational Chart (NOAA ENC) suite to support the marine transportation...

Seasonal variations of aerosol over Dona Paula, A coastal site on the west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Suresh, T.; Desa, E.S.

and eastern parts of Goa are other potential sources of dust. Goa is a tourist location and there is an influx of tourists during the summer period, which also contribute to the pollution from vehicle emission and dust. 3.3. Inter-annual variation Using AOT... We thank Director, National Institute of Oceanogra- Goa, India for supporting this program. We are quality measures to be undertaken in future to safeguard the health of tourists and local population from air pollution. C15 There is need for a better...

Epidemiology & risk factors of scrub typhus in south India

Directory of Open Access Journals (Sweden)

George M Varghese

2016-01-01

Full Text Available Background & objectives: Scrub typhus is a major public health threat in South and Southeastern Asian countries including India. Understanding local patterns of disease and factors that place individuals at risk is pivotal to future preventive measures against scrub typhus. The primary aim of this study was to identify specific epidemiological and geographical factors associated with an increased risk of developing scrub typhus in this region. Methods: We mapped 709 patients from Tamil Nadu, Andhra Pradesh and Telangana who were admitted to the Christian Medical College (CMC Hospital, Vellore, Tamil Nadu, India, for the period 2006-2011, assessed seasonality using monthly counts of scrub typhus cases, and conducted a case-control study among a subset of patients residing in Vellore. Results: The geographic distribution of cases at CMC Hospital clusters around the Tamil Nadu-Andhra Pradesh border. However, distinct hotspots clearly exist distal to this area, near Madurai and the coast in Tamil Nadu, and in the Northeast of Andhra Pradesh. Seasonally, the highest numbers of cases were observed in the cooler months of the year, i.e. September to January. In the case-control analysis, cases were more likely to be agricultural laborers (OR 1.79, 95% CI 1.01 - 3.15, not wear a shirt at home (OR 4.23, 95% CI 1.12 - 16.3, live in houses adjacent to bushes or shrubs (OR 1.95, 95% CI 1.08 - 3.53, and live in a single room home (OR 1.75, 95% CI 1.02 - 3.01. On binary logistic regression, the first three of these variables were statistically significant. Interpretation & conclusions: With the growing number of cases detected in India, scrub typhus is fast emerging as a public health threat and further research to protect the population from this deadly infection is essential. Health education campaigns focusing on the agricultural workers of Southern India, especially during the cooler months of the year, can serve as an important public health measure to

MEASUREMENT OF SURFACE SOLAR UV-B RADIATION AT TROPICAL COASTAL STATION BAKKHALI IN WEST BENGAL, INDIA

OpenAIRE

R. BHATTACHARYA; A. BHOUMICK

2012-01-01

Surface solar ultraviolet irradiance has been measured at Bakkhali (21.8ºN, 87.8ºE), a tropical rural station on the coast of Bay of Bengal, India in West Bengal. The measurements show a remarkable variation in UV-B load exists with a peak value at noon. The blockage of direct UV radiation in mangrove forest of costal site appears low when compared with UV load beneath the multiple trees of Mangifera indica in an inland site of Kalyani (22058' N, 88028' E), West Bengal. Mangrove forests have ...

A functional intranet for the United States Coast Guard Unit

OpenAIRE

Hannah, Robert Todd.

1998-01-01

Approved for public release; distribution in unlimited. This thesis describes the complete development process of a friendly functional Intranet for an operational United States Coast Guard (USCG) electronic Support Unit (ESU) in Alameda, California. The final product is suitable for immediate use. It may also be used as a prototype for future Intranet development efforts. The methodology used to develop a finished, working product provides the core subject matter for this thesis. The disc...

Branchial cymothoids infesting the marine food fishes of Malabar coast.

Science.gov (United States)

Panakkool-Thamban, Aneesh; Ameri Kottarathil, Helna; Kappalli, Sudha

2016-12-01

Occurrence of cymothoid isopods parasitizing the branchial chamber of marine food fishes along the Malabar coast was investigated. Live and fresh fishes collected from the Ayyikkara fish landing center (Lat. 11°51'N, Long. 75°22'E; Malabar coast, India) were subjected to the thorough observation for the presence of branchial cymothoids for 3 consecutive years (November 2009-November 2012). Among the recovered cymothoids, 11 species were branchial residents belonging to 6 genera; the species include Agarna malayi, Catoessa gruneri, C. boscii, Joryma hilsae, J. brachysoma, J. engraulidis, J. sawayah, Mothocya collettei, M. renardi, Norileca indica and Ryukyua circularis ; highest prevalence being exhibited by two species of Mothocya , ( M. renardi and M. collettei ) parasitizing the belonidaen fishes, Strongylura leiura (92.15 %) and Tylosurus crocodilus crocodilus (87.2 %) respectively. Except Mothocya species, which preferred the branchial floor for infestation, all recovered branchial cymothoids were found attached the inner wall of the operculum. In several instances, the parasites appeared in male-female pairs, one in each branchial cavity. Ovigerous female members of all species of branchial cymothoids except R. circularis showed remarkable bending either towards left or right depending on whether they are located in right or left branchial cavity of their respective host fishes. The deleterious effects of parasitization by all recovered branchial cymothoids include the formation of a pit like depression in the branchial chamber and atrophy of the gill filament; the damage was more pronounced in the gill cavity of parasitized host fishes where the ovigerous female member was accommodated.

Seasonal distribution of phytoplankton and its association with physico-chemical parameters in coastal waters of Malvan, west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Hardikar, R.; Haridevi, C.K.; Chowdhury, M.; Shinde, N.; Ram, A.; Rokade, M.A.; Rakesh, P.S.

stations. Despite of various human interventions the water quality and phytoplankton assemblage of this area has not reached to an alarming situation. The current study provides a valuable baseline data on phytoplankton assemblage from Malvan coast....

Temporal variation of aerosol optical depth and associated shortwave radiative forcing over a coastal site along the west coast of India.

Science.gov (United States)

Menon, Harilal B; Shirodkar, Shilpa; Kedia, Sumita; S, Ramachandran; Babu, Suresh; Moorthy, K Krishna

2014-01-15

Optical characterization of aerosol was performed by assessing the columnar aerosol optical depth (AOD) and angstrom wavelength exponent (α) using data from the Microtops II Sunphotometer. The data were collected on cloud free days over Goa, a coastal site along the west coast of India, from January to December 2008. Along with the composite aerosol, the black carbon (BC) mass concentration from the Aethalometer was also analyzed. The AOD0.500 μm and angstrom wavelength exponent (α) were in the range of 0.26 to 0.7 and 0.52 to 1.33, respectively, indicative of a significant seasonal shift in aerosol characteristics during the study period. The monthly mean AOD0.500 μm exhibited a bi-modal distribution, with a primary peak in April (0.7) and a secondary peak in October (0.54), whereas the minimum of 0.26 was observed in May. The monthly mean BC mass concentration varied between 0.31 μg/m(3) and 4.5 μg/m(3), and the single scattering albedo (SSA), estimated using the OPAC model, ranged from 0.87 to 0.97. Modeled aerosol optical properties were used to estimate the direct aerosol shortwave radiative forcing (DASRF) in the wavelength range 0.25 μm4.0 μm. The monthly mean forcing at the surface, at the top of the atmosphere (TOA) and in the atmosphere varied between -14.1 Wm(-2) and -35.6 Wm(-2), -6.7 Wm(-2) and -13.4 Wm(-2) and 5.5 Wm(-2) to 22.5 Wm(-2), respectively. These results indicate that the annual SSA cycle in the atmosphere is regulated by BC (absorbing aerosol), resulting in a positive forcing; however, the surface forcing was governed by the natural aerosol scattering, which yielded a negative forcing. These two conditions neutralized, resulting in a negative forcing at the TOA that remains nearly constant throughout the year. © 2013.

Assessing impact of climate change on Mundra mangrove forest ecosystem, Gulf of Kutch, western coast of India: a synergistic evaluation using remote sensing

Science.gov (United States)

Srivastava, Prashant K.; Mehta, Abhinav; Gupta, Manika; Singh, Sudhir Kumar; Islam, Tanvir

2015-05-01

Mangrove cover changes have globally raised the apprehensions as the changes influence the coastal climate as well as the marine ecosystem services. The main goals of this research are focused on the monitoring of land cover and mangrove spatial changes particularly for the Mundra forest in the western coast of Gujarat state, India, which is famous for its unique mangrove bio-diversity. The multi-temporal Indian Remote Sensing (IRS) Linear Imaging Self Scanning (LISS)-II (IRS-1B) and III (IRS P6/RESOURCESAT-1) images captured in the year 1994 and 2010 were utilized for the spatio-temporal analysis of the area. The land cover and mangrove density was estimated by a unique hybrid classification which consists of K means unsupervised following maximum likelihood classification (MLC) supervised classification-based approach. The vegetation and non-vegetation layers has been extracted and separated by unsupervised classification technique while the training-based MLC was applied on the separated vegetation and non-vegetation classes to classify them into 11 land use/land cover classes. The climatic variables of the area involves wind, temperature, dew point, precipitation, and mean sea level investigated for the period of 17 years over the site. To understand the driving factors, the anthropogenic variables were also taken into account such as historical population datasets. The overall analysis indicates a significant change in the frequency and magnitude of sea-level rise from 1994 to 2010. The analysis of the meteorological variables indicates a high pressure and changes in mangrove density during the 17 years of time, which reveals that if appropriate actions are not initiated soon, the Mundra mangroves might become the victims of climate change-induced habitat loss. After analyzing all the factors, some recommendations and suggestions are provided for effective mangrove conservation and resilience, which could be used by forest official to protect this precious

Spatial Reconnaissance : Technical Report ComCoast

NARCIS (Netherlands)

Verhagen, H.J.; Ahlhorn, F.

2005-01-01

ComCoast (Combined Functions in Coastal Defence Zones) is an INTERREG IIIB project funded by the EU. ComCoast aims to develop and demonstrate innovative solutions for flood protection in coastal areas. In ComCoast, five countries from the North Sea Region are involved: Belgium, Denmark, The

Impact of sewage on the distribution, abundance and community structure of rocky intertidal macroalgae of the Colaba Coast, Mumbai, India

Digital Repository Service at National Institute of Oceanography (India)

Dhargalkar, V.K.; Komarpant, D.S.

algae from the Istrian coast (vicinity of Rovinj) Ada Adriatica, 23:329 - 337. Murray, S. N. and M.M. Littler 1984. Analysis of seaweed communities in a disturbed rocky intertidal environment near Whites Point, Los Angeles. California, USA...

Current climate and climate change over India as simulated by the Canadian Regional Climate Model

Science.gov (United States)

Alexandru, Adelina; Sushama, Laxmi

2015-08-01

The performance of the fifth generation of the Canadian Regional Climate Model (CRCM5) in reproducing the main climatic characteristics over India during the southwest (SW)-, post- and pre-monsoon seasons are presented in this article. To assess the performance of CRCM5, European Centre for Medium- Range Weather Forecasts (ECMWF) Re- Analysis (ERA- 40) and Interim re-analysis (ERA-Interim) driven CRCM5 simulation is compared against independent observations and reanalysis data for the 1971-2000 period. Projected changes for two future periods, 2041-2070 and 2071-2100, with respect to the 1971-2000 current period are assessed based on two transient climate change simulations of CRCM5 spanning the 1950-2100 period. These two simulations are driven by the Canadian Earth System Model version 2 (CanESM2) and the Max Planck Institute for Meteorology's Earth System Low Resolution Model (MPI-ESM-LR), respectively. The boundary forcing errors associated with errors in the driving global climate models are also studied by comparing the 1971-2000 period of the CanESM2 and MPI-ESM-LR driven simulations with that of the CRCM5 simulation driven by ERA-40/ERA-Interim. Results show that CRCM5 driven by ERA-40/ERA-Interim is in general able to capture well the temporal and spatial patterns of 2 m-temperature, precipitation, wind, sea level pressure, total runoff and soil moisture over India in comparison with available reanalysis and observations. However, some noticeable differences between the model and observational data were found during the SW-monsoon season within the domain of integration. CRCM5 driven by ERA-40/ERA-Interim is 1-2 °C colder than CRU observations and generates more precipitation over the Western Ghats and central regions of India, and not enough in the northern and north-eastern parts of India and along the Konkan west coast in comparison with the observed precipitation. The monsoon onset seems to be relatively well captured over the southwestern coast of

Study of aerosol optical thickness using MODIS satellite data and sun photometer in a part of West coast of India

Digital Repository Service at National Institute of Oceanography (India)

SanilKumar, R.K.; Suresh, T.; Govindaraju; Urs, J.R.; SureshKumar, B.V.

(Karnataka) and Karwar (Karnataka) locations are part of this coast line. These places are important tourist as well as fishing activities. 4. Methodology: The methodology includes seven step approach (Fig.1). Step 1. AOT readings are obtained from Sunphotometer...

Trophic efficiency of plankton food webs: Observations from the Gulf of Mannar and the Palk Bay, Southeast Coast of India

Digital Repository Service at National Institute of Oceanography (India)

Anjusha, A.; Jyothibabu, R; Jagadeesan, L.; Mohan, A.P.; Sudheesh, K.; Krishna, K.; Ullas, N.; Deepak, M.P.

This paper introduces the structure and trophic efficiency of plankton food webs in the Gulf of Mannar (GoM) and the Palk Bay (PB) - two least studied marine environments located between India and Sri Lanka. The study is based on the results...

From Bathymetry to Bioshields: A Review of Post-Tsunami Ecological Research in India and its Implications for Policy

Science.gov (United States)

Mukherjee, Nibedita; Dahdouh-Guebas, Farid; Kapoor, Vena; Arthur, Rohan; Koedam, Nico; Sridhar, Aarthi; Shanker, Kartik

2010-09-01

More than half a decade has passed since the December 26th 2004 tsunami hit the Indian coast leaving a trail of ecological, economic and human destruction in its wake. We reviewed the coastal ecological research carried out in India in the light of the tsunami. In addition, we also briefly reviewed the ecological research in other tsunami affected countries in Asia namely Sri Lanka, Indonesia, Thailand and Maldives in order to provide a broader perspective of ecological research after tsunami. A basic search in ISI Web of Knowledge using keywords “tsunami” and “India” resulted in 127 peer reviewed journal articles, of which 39 articles were pertaining to ecological sciences. In comparison, Sri Lanka, Indonesia, Thailand and Maldives had, respectively, eight, four, 21 and two articles pertaining to ecology. In India, bioshields received the major share of scientific interest (14 out of 39) while only one study (each) was dedicated to corals, seagrasses, seaweeds and meiofauna, pointing to the paucity of research attention dedicated to these critical ecosystems. We noted that very few interdisciplinary studies looked at linkages between pure/applied sciences and the social sciences in India. In addition, there appears to be little correlation between the limited research that was done and its influence on policy in India. This review points to gap areas in ecological research in India and highlights the lessons learnt from research in other tsunami-affected countries. It also provides guidance on the links between science and policy that are required for effective coastal zone management.

Rare earth industry in India

International Nuclear Information System (INIS)

Singh, D.S.

2016-01-01

Rare Earths (RE) comprises of 17 elements i.e. elements from atomic No. 57-71 (lanthanide series) along with yttrium (atomic No. 39) and scandium (atomic No. 21). They exhibit special electronic, magnetic, optical and catalytic properties. The first 7 elements in the lanthanide series from atomic Nos. 57 to 63 (La to Eu) are called Light Rare Earths (LRE), while the remaining elements from atomic Nos. 64 to 71 (Gd to Lu) are grouped as Heavy Rare Earths (HRE). Scandium and Yttrium have properties similar to HRE. The concentration of the REs in the earth's crust is as high as some other elements including that of copper. The only difference is that REs do not occur as separate minerals amenable for easy exploration and mining and are widely distributed across the earth's surface, hence they are called as REs. Resources In India, monazite has been the principal source of RE. It occurs in association with other heavy minerals, such as ilmenite, rutile, zircon etc. in the beach sands and inland placer deposits. The monazite content in this assemblage varies from negligible quantity to as high as 5%. As per AMD resource estimation, the reported resource of monazite in India is about 11.93 million tons which corresponds with about 6.9 million tons of RE oxides. Although India possesses large deposits of monazite, the heavier RE are not present in sufficient quantities in this mineral. (author)

A comparative study of macrobenthic community from harbours along the central west coast of India

Digital Repository Service at National Institute of Oceanography (India)

Ingole, B.S.; Sivadas, S.; Nanajkar, M.; Sautya, S.; Nag, A.

and exploitation for sustainable development and conservation on fish stocks, V.S. Somvanshi, (Ed.)), Fishery Survey of India, (pp 54-58). 17. Hines, A.H., Hadden, A.E. & Weichest, L.A. 1990. Guild structure and foraging impact of blue crabs and epibenthic fish...) between the harbours A 0 0.5 1 1.5 2 2.5 s p eci es r i ch n ess ± S E B 0 0.5 1 1.5 2 2.5 Rat1 Rat2 Goa 1 Goa 2 Kar 1 Kar 2 Stations D i ve r s it y ± S E 0 0.2 0.4 0.6 0.8 1 E ven n ess ± S E H J 23 Fig. 6: ABC curve...

33 CFR 23.10 - Coast Guard emblem.

Science.gov (United States)

2010-07-01

... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Coast Guard emblem. 23.10 Section... DISTINCTIVE MARKINGS FOR COAST GUARD VESSELS AND AIRCRAFT § 23.10 Coast Guard emblem. (a) The distinctive emblem of the Coast Guard shall be as follows: On a disc the shield of the Coat of Arms of the United...

FDI Climate in India

OpenAIRE

Khandelwal, Varun

2007-01-01

ABSTRACT Since 1991, after the external payment crisis in India, there has been liberalization of various policies by the Government of India. Due to this there has been rapid surge of FDI inflows in India. The current investment climate has attracted many foreign investors to India in various sectors. India is considered as one of the favorable destination of FDI. However the country also suffers from few weaknesses and constraints in terms of policy and regulatory framework, which rest...

Sea level during storm surges as seen in tide-gauge records along the east coast of India

Digital Repository Service at National Institute of Oceanography (India)

Sundar, D.; Shankar, D.; Shetye, S.R.

and crossed the north Orissa coast later that day; it weakened and moved westward subsequent to landfall. Sea-level variations due to surges triggered by storm winds form a noise superimposed on the highly periodic tides, which have astronomical origins.... In the next section we describe the analysis used to 1326 CURRENT SCIENCE, VOL. 77, NO. 10, 25 NOVEMBER 1999 COMPUTATIONAL ENGINEERING SCIENCE Figure 1b. Astronomical tide and dehyphenminustided sea level during Event 1. The dark blue vertical lines...

Magnetic anomalies and their possible relation with heavy mineral placers and basement configuration in Mirya bay, Konkan coast, Maharashtra, India

Digital Repository Service at National Institute of Oceanography (India)

Ramana, M.V.

) N-S trending high amplitude and long wavelength anomalies (250-350 nT, about 500-700 m) approximately on a line joining the Mirya Head with the Bhagvati Fort, Maharashtra, India and extending 3 km offshore, and (2) low amplitude and medium to short...

Development of electron linear accelerators in SAMEER

International Nuclear Information System (INIS)

Krishnan, R.

2015-01-01

LINear Accelerator (LINAC) based Radiotherapy machine is a key tool for Cancer Treatment. The number of such linac machines available is far less than the actual requirement projected, to suffice the needs of the vast number of Cancer Patients in the country. Development of indigenous state-of-art cancer therapy machine was therefore a crucial achievement under the Jai Vigyan Project of Govt. of India. With the support of Department of Electronics and Information Technology (DeitY), Govt of India, SAMEER has successfully developed 6 MV Radiation Oncology machine at par international standards and is being used to treat cancer patients in the country. SAMEER is also currently developing the dual photon energy and multiple electron energy medical linac machine for radiotherapy and also critical accessories to make a complete oncology system required for advanced state of art treatment. In this paper the work in SAMEER on electron linear accelerators for the medical applications and the related technology and facilities available will be presented. (author)

BENTHIC FORAMINIFERAL AND ITS ENVIRONMENTAL DEGRADATION STUDIES BETWEEN THE TSUNAMIGENIC SEDIMENTS OF MANDAPAM AND TUTICORIN, SOUTH EAST COAST OF INDIA

Directory of Open Access Journals (Sweden)

S. P. MOHAN

2007-01-01

Full Text Available The Gulf of Mannar is a transitional zone between the Arabian Sea and Indian Ocean proper and is connected with the Bay of Bengal through a shallow sill, the Palk Strait. The study area extends from Mandapam to Tuticorin on the southern coast of Tamil Nadu (India over a distance of 120 km. It is bound in the northeast by Rameshwaram Island, in the east by the Bay of Bengal, in the west by the Eastern and Western Ghats, and in the south by Tuticorin. A total of 36 sediment samples were collected from the beach (6 and the offshore (30 area in the study region. The offshore samples were collected at six transects keeping the stations at Mandapam (5 nos, Valinokkam (5 nos, Vaippar (5 nos, Vembar (5 nos, Kallar, (5 nos and Tuticorin (5 nos. Totally, 77 benthic foraminiferal species (Post-tsunami and varieties belonging to 39 genera, 13 families, 10 superfamilies and 4 suborders have been reported and illustrated. The following species are widely distributed in the pre and post-tsunami samples namely Spiroloculina communis, Quinqueloculina elongatum, Q.lamarckiana, Q. seminulum, Triloculina trigonula, Cibicides lobatululs, Ammonia beccarii, A. dentata, A.tepida, Elphidium crispum and Assilina ammonoides. Grain size studies shows the frequency curves vary from unimodal to bimodal in places of river discharge from the Vembar, Kallar, Vaippar and Tamiraparani, as a result of which an additional sub-population is deposited. At Mandapam and Tuticorin, the total species are increasing in the deeper depths whereas in Kallar there will be reverse trend which decreases with depth. Similarly, the living species also have the same trend at Vallinokkam. The scatter plot of salinity versus living species shows a positive correlation. The scatter plot of organic matter versus living species shows strong negative correlation and positive correlation with dead species showing a negative relation with the biomass. Further, the trend of organic matter vs. carbonate

Shore protection for the coast of Mousuni Island in West Bengal, India

Directory of Open Access Journals (Sweden)

V Sundar

2016-08-01

Full Text Available The Mousuni Island in West Bengal, India is wide-open to Bay of Bengal. This island by virtue of its location is exposed to river flow as well as wave action. It is thus subjected to severe erosion along its south-western coastal stretch and also significantly affecting agriculture due to seawater inundation. This is due to the lower level of bund crest elevation combined with high water levels during coastal flooding. The most suitable method to arrest the shore erosion and salt water intrusion is to divert the flow gradually toward the deeper section of the channel. To meet this requirement, after carrying out a comprehensive profiling of the existing bund, bank connected series of spurs with locally available construction materials and unskilled labor are proposed. In order to design these spurs, the magnitude and direction of sediment movement along the stretch is estimated. The layout of protection measures is proposed based on a detailed analysis of site conditions and the environmental conditions. The tranquility inside the proposed coastal protecting structure is substantiated with a two-dimensional horizontal flow model. Furthermore, the behavior of the shorelines has been studied numerically with the proposed coastal protection measure. The detailed analysis of the results from the numerical model and the protection measure are discussed in this article.

Preference and Use of Electronic Information and Resources by Blind/Visually Impaired in NCR Libraries in India

Directory of Open Access Journals (Sweden)

Shailendra Kumar

2013-06-01

Full Text Available This paper aims to determine the preference and use of electronic information and resources by blind/visually impaired users in the leading National Capital Region (NCR libraries of India. Survey methodology has been used as the basic research tool for data collection with the help of questionnaires. The 125 in total users surveyed in all the five libraries were selected randomly on the basis of willingness of the users with experience of working in digital environments to participate in the survey. The survey results were tabulated and analyzed with descriptive statistics methods using Excel software and 'Stata version 11'. The findings reveal that ICT have a positive impact in the lives of people with disabilities as it helps them to work independently and increases the level of confidence among them. The Internet is the most preferred medium of access to information among the majority of blind/visually impaired users. The 'Complexity of content available on the net' is found as the major challenge faced during Internet use by blind users of NCR libraries. 'Audio books on CDs/DVDs and DAISY books' are the most preferred electronic resources among the majority of blind/visually impaired users. This study will help the library professionals and organizations/institutions serving people with disabilities to develop effective library services for blind/visually impaired users in the digital environment on the basis of findings on information usage behavior in the study.

India Emerging

International Development Research Centre (IDRC) Digital Library (Canada)

Traditionally, India has had an extremely poor collection of direct taxes, not least due to ...... Economic Impact of Mobile in Bangladesh, Malaysia, Pakistan, Serbia, ...... in India owes its origin to Gandhian principles, philosophy and practices.

77 FR 75101 - Fisheries Off West Coast States; West Coast Salmon Fisheries; Amendment 17 to the Salmon Fishery...

Science.gov (United States)

2012-12-19

.... 120813333-2647-01] RIN 0648-BC28 Fisheries Off West Coast States; West Coast Salmon Fisheries; Amendment 17 to the Salmon Fishery Management Plan AGENCY: National Marine Fisheries Service (NMFS), National.... SUMMARY: NMFS proposes regulations to implement Amendment 17 to the Pacific Coast Salmon Fishery...

A unique late bronze age copper fish-hook from Bet Dwarka Island, Gujarat, west coast of India: Evidence on the advance fishing technology in ancient India

Digital Repository Service at National Institute of Oceanography (India)

Gaur, A.S.; Sundaresh

role in phosphate transport. A fall in s e rum phosphate level has been reported 9 in patients of meta - static pro s tate cancer treated with high dose of diethyl sti l bo esterol, a synthetic estrogen. Testoste r one seems to enhance calciu m.... Exp . Biol. , 2002, 40 , 780 ? 784. Received 30 October 2003; accepted 3 D e cem - ber 2003 M ARY V INCENT C HIRAYATH J. P RAKASA R AO * Department of Physiology, Christian Medical College, Vellore 632 002, India *For...

Nuclear Desalination Demonstration Project (NDDP) in India

International Nuclear Information System (INIS)

Tewari, P.K.; Misra, B.M.

2001-01-01

In order to gainfully employ the years of experience and expertise in various aspects of desalination activity, BARC (India) has undertaken installation of a hybrid nuclear desalination plant coupled to 170 MW(e) PHWR station at Kalpakkam, Chennai in the Southeast coast of India. The integrated system, called the Nuclear Desalination Demonstration Project (NDDP), will thus meet the dual needs of process water for nuclear power plant and drinking water for the neighbouring people. NDDP aims for demonstrating the safe and economic production of good quality water by nuclear desalination of seawater. It comprises a 4500 m 3 /d Multistage Flash (MSF) and a 1800 m 3 /d Reverse Osmosis (RO) plant. MSF section uses low pressure steam from Madras Atomic Power Station (MAPS), Kalpakkam. The objectives of the NDDP (Kalpakkam) are as follows: to establish the indigenous capability for the design, manufacture, installation and operation of nuclear desalination plants; to generate necessary design inputs and optimum process parameters for large scale nuclear desalination plant; to serve as a demonstration project to IAEA welcoming participation from interested member states. The hybrid plant is envisaged to have a number of advantages: a part of high purity desalted water produced from MSF plant will be used for the makeup demineralised water requirement (after necessary polishing) for the power station; blending of the product water from RO and MSF plants would provide requisite quality drinking water; the RO plant will continue to be operated to provide the water for drinking purposes during the shutdown of the power station

Use of Electronic Loggers to Measure Changes in the Rates of Hand Washing with Soap in Low-Income Urban Households in India.

Science.gov (United States)

Wright, Richard L; Zillmer, Ruediger; Biran, Adam; Hall, Peter; Sidibe, Myriam

2015-01-01

We evaluated the utility of electronic loggers to measure the effects of a simple intervention designed to influence the rates of hand washing with soap within enclosed toilets and bathrooms in low-income urban households in Kerala, India. 58 households were given three items with embedded electronic loggers for a period of 2-5 days. Two logged soaps tracked hand and body washing in the bathroom. The third logged item was a water vessel used for flushing the toilet and for post-defecation anal cleansing; this served as a marker of toilet use. In addition, 28 households in a Soap by toilet arm were given an additional logged soap, to be kept by the toilet, and used for hand washing. Compared with the Soap in bathroom arm, the loggers in the Soap by toilet households recorded 73% greater daily use of soaps designated for hand washing (t(36)=2.92, psoap and changes in hand washing with soap after use of the toilet. Further adoption of logger technologies would enable more insightful studies of hand washing within urban environments.

South Oregon Coast Reinforcement.

Energy Technology Data Exchange (ETDEWEB)

United States. Bonneville Power Administration.

1998-05-01

The Bonneville Power Administration is proposing to build a transmission line to reinforce electrical service to the southern coast of Oregon. This FYI outlines the proposal, tells how one can learn more, and how one can share ideas and opinions. The project will reinforce Oregon`s south coast area and provide the necessary transmission for Nucor Corporation to build a new steel mill in the Coos Bay/North Bend area. The proposed plant, which would use mostly recycled scrap metal, would produce rolled steel products. The plant would require a large amount of electrical power to run the furnace used in its steel-making process. In addition to the potential steel mill, electrical loads in the south Oregon coast area are expected to continue to grow.

Opinion of residents from the Gold Coast, Queensland, on community water fluoridation.

Science.gov (United States)

Kroon, Jeroen; Reid, Kate Emily; Cutting, Jenna Renae; Lalloo, Ratilal; Chiu, Kandy Chien

2014-02-01

To investigate opinions and concerns of Gold Coast residents regarding fluoridation of community water supplies. Anonymous data were collected in four major shopping centers from approximately 500 Gold Coast residents. Eighty-one percent of participants were aware of the addition of fluoride to the water supply. More than half obtained information on water fluoridation through the print and electronic media. Sixty percent of respondents supported water fluoridation. The majority preferred the public and/or health professionals to have made the decision on water fluoridation rather than the government. The percentage of residents supporting water fluoridation was lower than that found in other Queensland, Australian, and worldwide surveys. In this study, only age and the highest level of education attained were factors significantly related to levels of support for water fluoridation. The Queensland Government's decision to implement water fluoridation without a referendum caused disquiet amongst some Gold Coast residents. Future public health initiatives therefore may be assisted by more consultation with, and involvement from, health professionals in the relevant fields. Public health campaigns may benefit more from interaction with the community in order to address their specific concerns. © 2012 Wiley Publishing Asia Pty Ltd.

76 FR 81851 - Fisheries Off West Coast States; West Coast Salmon Fisheries; Amendment 16 to the Salmon Fishery...

Science.gov (United States)

2011-12-29

.... 101206604-1758-02] RIN 0648-BA55 Fisheries Off West Coast States; West Coast Salmon Fisheries; Amendment 16 to the Salmon Fishery Management Plan AGENCY: National Marine Fisheries Service (NMFS), National...) to implement Amendment 16 to the Pacific Coast Salmon Fishery Management Plan for Commercial and...

76 FR 65673 - Fisheries Off West Coast States; West Coast Salmon Fisheries; Amendment 16 to the Salmon Fishery...

Science.gov (United States)

2011-10-24

.... 101206604-1620-01] RIN 0648-BA55 Fisheries Off West Coast States; West Coast Salmon Fisheries; Amendment 16 to the Salmon Fishery Management Plan AGENCY: National Marine Fisheries Service (NMFS), National... implement Amendment 16 to the Pacific Coast Salmon Fishery Management Plan for Commercial and Recreational...

78 FR 10557 - Fisheries Off West Coast States; West Coast Salmon Fisheries; Amendment 17 to the Salmon Fishery...

Science.gov (United States)

2013-02-14

.... 120813333-3107-02] RIN 0648-BC28 Fisheries Off West Coast States; West Coast Salmon Fisheries; Amendment 17 to the Salmon Fishery Management Plan AGENCY: National Marine Fisheries Service (NMFS), National... implement Amendment 17 to the Pacific Coast Salmon Fishery Management Plan for Commercial and Recreational...

Organized convection over southwest peninsular India during the pre-monsoon season

Science.gov (United States)

Sreelekha, P. N.; Babu, C. A.

2018-03-01

The paper addresses observational aspects of widespread rain associated with the organized convection that forms over the southwest peninsular India during the pre-monsoon season. The evolution of the cloud band over the equatorial region, its northward propagation, development of cross equatorial flow near the Somalia coast, and appearance of equatorial westerly wind resemble closely to that of the monsoon organized convection. Low-level convergence, cyclonic vorticity, and ascending motion are other major characteristics of the cloud bands associated with the pre-monsoon organized convection which exhibits similarity with that of monsoon. The ascending motion plays vital role on the formation of cloud band that produces widespread rainfall persisting for more than a week. The vertical shear of meridional winds is found to co-exist with precipitation over the Arabian Sea off the southwest peninsular India. The velocity potential values derived from the winds at 850 and 200 hPa levels confirm the rising motion on the basis of low-level convergence and upper level divergence. Also, shifting of ascending limb of the local Hadley circulation to the north of the equator is observed during the days of the presence of organized convection over the southwest peninsular region. Noticeable shift in the Walker circulation rising limb is also identified during the same time.

Indian Ocean coasts, coastal ecology

Digital Repository Service at National Institute of Oceanography (India)

Ingole, B.S.

stream_size 9 stream_content_type text/plain stream_name Encycl_Coast_Sci_2005_546.pdf.txt stream_source_info Encycl_Coast_Sci_2005_546.pdf.txt Content-Encoding ISO-8859-1 Content-Type text/plain; charset=ISO-8859-1 ...