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Variation of physico-chemical characteristics with tide in Visakhapatnam harbour waters, east coast of India

DRS at CSIR-National Institute of Oceanography

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Title Variation of physico-chemical characteristics with tide in Visakhapatnam harbour waters, east coast of India
 
Creator RamaRaju, V.S.
Rao, T.V.N.
Rathod, V.
 
Subject Chemistry and Biogeochemistry
harbours
industrial wastes
nutrients (mineral)
seasonal variations
ocean currents
tidal cycles
physicochemical properties
ISW, India, Andhra Pradesh, Visakhapatnam
 
Description Variations in physico-chemical parameters (DO, BOD, NO2, SiO4, PO4 suspended solids, salinity and currents) observed in the waters of main channel of Visakhapatnam Harbour over a tidal cycle in different seasons from February 1982 to January 1983 are presented. In general, tidal variations in these parameters in surface waters show increasing trend during flood tide and decreasing trend during ebb tide. However, the nutrient concentrations at st C (entrance channel) show the reverse trend. The wide fluctuations in physico-chemical parameters at st A (northwestern arm) may be attributed to the closeness of the station of the discharge point of industrial pollutants. No significant variation is found during a tidal cycle in bottom water. Variations in wind during different seasons influence the current speeds in addition to tide in the Visakhapatnam Harbour. The net cross sectional discharges through the mouth of harbour into the sea during premonsoon, monsoon and postmonsoon seasons are 26.51, 47.30 and 19.64 m3 S-1 respectively
 
Date 1995-06-21T10:01:32Z
2017-09-29T13:48:15Z
1995-06-21T10:01:32Z
2017-09-29T13:48:15Z
1987
 
Type Journal Article
 
Identifier Indian Journal of Marine Sciences, vol.16; 1987; 218-222
0379-5136
http://drs.nio.org/drs/handle/2264/6131
 
Language en
 
Relation Indian J Mar Sci
NON-SCI
 
Publisher CSIR-NISCAIR