Water quality of the Poonthura Estuary, Thiruvananthapuram

K.S.A. Kumary, P.K.A. Azis

Abstract



The Poonthura Estuary, Kerala, India was monitored for its water quality from February 1991 to September 1991. Light penetration was minimum during period and the lowest values were observed at stations receiving large quantities of sewage wastes. pH was maximum during the pre-monsoon period and showed a distinct stratification. Salinity distribution was mostly influenced by the sea-estuary interaction consequent to the opening of the sand bar and the concentration of dissolved oxygen was very low at the polluted stations. High sulphide content was observed at the polluted stations especially during the pre-monsoon period. The general distribution of nutrients maintained an increasing trend from the pre-monsoon to the monsoon period and comparatively high values were observed at the polluted stations

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