The physico-chemicaland bacteriological parameters commonlyusedto specify water quality of a water body/lakeintropical urban areas indicate decliningtrend of water quality, unsuitable for the growth of higher aquatic species. Solar energy, which is manifested as the change in temperature of the lake, is the main driving force, influencing the metabolic and physiological behaviour in freshwater ecosystems within the water body. In this backdrop, the present study has been carried out in the national lake in the southern part of Kolkata to assess the physico-chemical and bacteriological characteristics of lake water as well as the dependency of the water quality parameters with water temperature at three depths of the lake. The coefficient of determination (R2), which gives a better indication of the relations among the different physico-chemical and bacteriological parameters has been established. The analysis depicts lake sensitivity to pollution due to human activities, as observed by the presence of high bacterial loads recorded at different sampling points.
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