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like nitrate, nitrite, inorganic phosphate and reactive silicate from two different stations in Uppanar estuary, Cuddalore, southeast coast of India. Atmospheric and surface water temperatures varied temporally. The nutrient concentrations were higher during monsoon season and low during summer. Pra

Sadhuram et al. (2005) studied the physical and chemical characteristics of the Hooghly estuary during winter, summer and post monsoon season. Salinity varied spatially, temporarily and seasonally during ebb and flood tide conditions. Water temperature showed a difference of 10 o C from winter to summer. Temperature did not vary much vertically as it was a well mixed estuary. Values of pH, dissolved oxygen and biological oxygen demand were within the threshold limits of the estuarine environment. High values of total suspended matter were noticed both at surface and bottom in the study region showing the impact of fresh water and sediment transportation.