Physico-chemical and biological data on water and sediments were collected from Mandovi and Zuari Rivers of Goa along the central west coast of India from 2007 to 2008 to understand the impact of developmental activit...Physico-chemical and biological data on water and sediments were collected from Mandovi and Zuari Rivers of Goa along the central west coast of India from 2007 to 2008 to understand the impact of developmental activities on the riverine environments. Factor analysis of the data segregated over high and low tides indicated a total of 6 factors each explaining 91% of variance during high tide and 84% of variance during low tide in Mandovi River. In Zuari River, a total of 6 factors explained 83% of variance during high tide and 4 factors explained 78% of variance during low tide. Factor analyses showed the dominance of nitrite and nitrate in Mandovi and of lead and mercury in Zuari. Higher inputs of anthropogenic ammonia and phenols associated with some phosphate were found in both these rivers. Water quality index （WQI） studies showed increasing overall index of pollution （OIP） values especially in the upstream of Zuari River, suggesting slightly polluted water. Increasing developmental activities along the banks of these rivers introduce domestic and anthropogenic nutrients and trace metals in their estuarine region, which flush out to the sea as per tidal currents, which otherwise can hamper the natural environments of these two rivers.展开更多
文摘Physico-chemical and biological data on water and sediments were collected from Mandovi and Zuari Rivers of Goa along the central west coast of India from 2007 to 2008 to understand the impact of developmental activities on the riverine environments. Factor analysis of the data segregated over high and low tides indicated a total of 6 factors each explaining 91% of variance during high tide and 84% of variance during low tide in Mandovi River. In Zuari River, a total of 6 factors explained 83% of variance during high tide and 4 factors explained 78% of variance during low tide. Factor analyses showed the dominance of nitrite and nitrate in Mandovi and of lead and mercury in Zuari. Higher inputs of anthropogenic ammonia and phenols associated with some phosphate were found in both these rivers. Water quality index （WQI） studies showed increasing overall index of pollution （OIP） values especially in the upstream of Zuari River, suggesting slightly polluted water. Increasing developmental activities along the banks of these rivers introduce domestic and anthropogenic nutrients and trace metals in their estuarine region, which flush out to the sea as per tidal currents, which otherwise can hamper the natural environments of these two rivers.
