Seasonal Variability and Behavior of Hydrographic and Nutrient Parameters in the Estuarine Waters of Gauthami Godavari, East Coast of India
Monitoringofriver waters arean important in now a days because of increasing industrialization, urbanization and anthropogenic actives from river banks. The industrial effluents, domestic sewage, agricultural wastesand aquacultural wastes are being discharged into the river waters and finally reaching into coastal waters that causing degradation of water quality. The present study was carried out to determine the water quality in terms of seasonal variability and behavior of physicochemical and
... physicochemical and nutrients parameters for a period of one year during 2013 in the estuarine waters of Gauthami Godavari along its longitudinal stretch at seven station from the head of the estuary to mouth of the estuary. The temperature valuesin the estuarine waters, varied from 25.60 to 31.80 O C, pH values in the in the range of 7.20 to 8.3, salinity ranged from 0.23 to 31.83 psu, dissolved oxygen values ranged from 2.36 to 6.82 mg.l -1 . The dissolved nitrite concentrationsvaried from 0.04 to 1.98 µM, nitrate concentrations varied from 0.48 to 17.20 µM, ammonia concentrations varied from 1.72 to 6.6 µM, phosphate concentrations varied from 0.11 to 3.41 µM, and silicate concentrations ranged from 6.56 to 165.94 µM. Hydrographical parameters(temperature, pH, salinity, dissolved oxygen) indicated distinct spatial and seasonal variations. Nutrients (nitrite, nitrate, ammonia, phosphate, silicate) in general, exhibited a decreasing trend from riverine to estuarine region indicating that dominant occurrenceof river water. This was also supported by the relatively higher levels in September (monsoon) when compared with March (pre-monsoon) and December (post-monsoon).