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

DRS at CSIR-National Institute of Oceanography

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Title Suspended sediment fluxes in a tropical estuary, west coast of India
 
Creator AnilKumar, N.
DineshKumar, P.K.
Srinivas, K.
 
Subject resuspended sediments
tropical environment
sediments
turbidity
flushing time
estuarine dynamics
seasonal variations
sediment texture
 
Description 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 was upstream during the premonsoon period and downstream during other seasons. Correlation between concentration and velocity at tidal frequencies established that the upstream movement of sediment was largely accomplished by tidal pumping. Maximum flux of the suspended sediment was obtained (1220.97 mg cm sup(-2) s sup(-1)) at the river mouth, during the monsoon period. High negative fluxes were obtained during premonsoon period (381.31 mg cm sup(-2) s sup(-1)) at the mouth of the estuary. During the months of low river flow, the estuary received net sediment inputs from the continental shelf and during high flows exported sediments to the continental shelf depending on the magnitudes of the floods. The major input of sediment from the watershed was 8.8 x 10 sup(4) tons. yr sup(-1) and the net sediment transported towards the continental shelf was estimated as 5.7 x 10 sup(4) tons. yr sup(-1). The net trapping of sediment in the lower estuary was approximately 3.1 x 10 sup(4) tons. yr sup(-1). It's confirmed that the estuary has a pronounced turbidity maximum zone at the bar mouth, where rapid short-term deposition of sediments occur during and following the monsoon freshet
 
Date 2008-02-22T04:47:44Z
2008-02-22T04:47:44Z
2005
 
Type Conference Article
 
Identifier Antarctic geoscience, ocean-atmosphere interaction and paleoclimatology, eds. Rajan, S.; Pandey, P.C. 318-330p.
http://drs.nio.org/drs/handle/2264/895
 
Language en
 
Rights Copyright [2005]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice by copyright holder that the rights are voilated then the item would be withdrawn.
 
Publisher NCAOR, Goa