Non-conservative controls on distribution of dissolved silicate in Cochin Backwaters
Date
1999Author
Balachandran, K.K.
Sankaranarayanan, V.N.
Joseph, T.
Nair, M.
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Cochin backwater system was studied with regard to dissolved silicate (DSi) to understand its seasonal distribution and behaviour during estuarine mixing. Silicate had a linear relationship with salinity during the high river discharge period. During premonsoon period, a sharp decrease of silicate with distance in the middle regions between salinity range of 4 to 22 x 10 sup(3) in the estuary was observed. River discharge was found to modulate both estuarine residence time and the DSi supply. The substantial removal of DSi (approximately 50%) during premonsoon was attributed to enhanced biological utilization, caused by the development of null zones in the middle areas of the estuary
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