长江南京段六大饮用水水源地水质变化及原因

Water quality variation and its causes in six drinking water source regions in Nanjing reach of Yangtze River

对长江南京段六大水厂饮用水水源地的水质变化趋势进行评价,并对水质较差的饮用水水源地的污染原因进行分析。结果表明:①上元门水厂取水口所属水功能区水质最差,其次是远古水业、浦口水厂的水源地水质。长江南京大厂工业、渔业用水区(左岸),长江南京浦口饮用、渔业用水区(左岸),长江南京上元门燕子矶饮用水水源、渔业用水区(右岸)这3处水源地2008年以来水质较往年明显降低。②造成饮用水水源地水质恶化的污染源主要包括排涝泵站、工业企业排污和污水处理厂不达标排污。③总磷是六大水厂饮用水水源地主要污染因子之一,其对饮用水水源地的水质影响权重越来越大。

The variation tendency of the water quality in the drinking water source regions of six waterworks in the Nanjing reach of the Yangtze River was evaluated in this study. The causes of pollution in the drinking water source regions with poor quality of water were analyzed. The results show the following： （ 1 ） The water function zone where the water intake of Shangyuanmen waterworks is located has the worst water quality, followed by the water source regions of the Yuangu and Pukou waterworks. The water quality in the water source regions of the Pukou, Shangyuanmen, Chengbei, and Yuangu waterworks has seriously deteriorated since 2008. （2） The causes for the deterioration of water quality in the drinking water source regions mainly include the construction of drainage pumping stations, industrial sewage discharge, and the standard-exceeding discharge from the wastewater treatment plants. （3） Total phosphorus is one of the main factors causing pollution of the drinking water sources, and it has had an increasingly significant influence on the water quality.