Ecology, Environment and Conservation Paper

Vol.04, Issue 1,2, 1998; Page No.(9-12)

HYDROCHEMICAL STUDIES AIONG THE COASTAI WATERS OFF MANGAIORE

Thresiamma Joseph, K.K. Balachandran, Maheswari Nair and V.N. Sankaranarayanan

Abstract

Environmental parameters such as temperature, salinity, dissolved oxygen, BOD„ pH, nutrients, suspended load and chlorophyll 'a' were estimated in the coastal waters of Mangalore. Four transeets, each consisting of four stations extending from old Mangalore port to Surathkal were monitored biomonthly and different parameters were compared seasonwise. Inorganic phosphate values registered high values at all the transects during September, with a maximum of 2.24 umo1/1. Nitrite was found to be absent except during January. Low bottom.values of dissolved oxygen with corresponding high inorganic phosphate were indicative of monsoonal up.velling along the Mangalore coast during September. This period was characterised by a drop in pH values, though not very significant. Low BOD values encountered indicated the absence of any organic pollution in the area.

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