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Freshwater flushing time scales of the Vashishti Estuary, west coast of India

DRS at CSIR-National Institute of Oceanography

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Title Freshwater flushing time scales of the Vashishti Estuary, west coast of India
 
Creator DineshKumar, P.K.
Sarma, R.V.
Zingde, M.D.
 
Subject Estuarine dynamics
Flushing time
Brackishwater pollution
River discharge
Water mixing
 
Description Results are presented for the Vashishti estuary, Kerala, India to evaluate its freshwater flushing time scales based on 8 sets of observations of longitudinal salinity distributions. The results of the flushing time using the fraction of freshwater method indicated that the load retained in the estuary after infinite number of tidal cycles was 44 to 54 times the load introduced per tidal cycles during premonsoon and 47 to 61 times during postmonsoon periods. Calculations on longitudinal diffusion coefficient (K) showed values ranging from 12 to 271 m sup(2) sec sup(-1) with smaller values occurring in the month region. Results of the effective diffusivity indicated that changes in K and mixing length together can cause a decrease in flushing time which is in general agreement with the observed dependence of the flushing time from the river discharge rate.
 
Date 2009-01-10T11:33:48Z
2009-01-10T11:33:48Z
1999
 
Type Journal Article
 
Identifier International Journal of Environmental Studies, Vol.56; 313-323p.
http://drs.nio.org/drs/handle/2264/1820
 
Language en
 
Rights Copyright [1999]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Taylor and Francis