Seasonal variation of physicochemical and toxic properties in three major rivers; Shitalakhya, Buriganga and Turag around Dhaka city, Bangladesh
Paper Details
Seasonal variation of physicochemical and toxic properties in three major rivers; Shitalakhya, Buriganga and Turag around Dhaka city, Bangladesh
Abstract
The indiscriminate dumping and release of wastes containing hazardous substances into rivers might lead to environmental disturbance which could be considered as a potential source of stress to biotic community. The purpose of this study was to investigate the seasonal variation in physicochemical and toxic metal concentrations of Shitalakhya, Buriganga and Turag river around Dhaka city as different kinds of industries dispose their waste into rivers. The results envisaged the, deteriorate of water quality with significant seasonal changes. In order to characterize the seasonal variability of surface water quality in these three rivers, Water Quality Index (WQI) was calculated from 14 parameters, periodically measured at three sampling sites of each river round a year. The results indicated a relatively good water quality was found in monsoon and the seasonal order of pollution magnitude is post-monsoon>pre-monsoon>monsoon. Water quality conditions were critical during post-monsoon, due to increase of anthropogenic interferences, low rainfall and river flow.
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S.M. Didar-Ul Islam, Gausul Azam (2015), Seasonal variation of physicochemical and toxic properties in three major rivers; Shitalakhya, Buriganga and Turag around Dhaka city, Bangladesh; JBES, V7, N3, September, P120-131
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