湖南省入河废污水对江河水质的影响分析

Impacts of wastewater discharge on water quality of rivers in Hunan Province

废污水的直接排放是河流水质污染的主要原因。就湖南省入河废污水的特征与主要河流水质进行分析 ,采取 1 998年监测资料 ,对湘江、资水、沅江、澧水的干支流水质分别进行评价。指出 ,湘江中下游长沙、株洲、湘潭 3市的废污水排放量占全省总排放量的 45 .6% ,其污径比最大 ,中下游干支流受到不同程度的污染。资水干流中游污染较为严重 ,沅江上游支流水质较差 ,澧水水质较好。

Direct discharge of wastewater is the main cause of pollution in rivers. In this paper, the characteristics of wastewater discharged into rivers are analyzed, and the water quality of rivers and tributaries, including the Xiangjiang River, Zishui River, Yuanjiang River, and Lishui River are evaluated. The results indicate that the volume of wastewater discharged into the Xiangjiang River basin accounts for 45.6% of the total volume discharged from the whole province, so the polluted area of the river basin is the largest, and that different degrees of pollution occur in the mainstream and tributaries of the middle and lower Xiangjiang River. It is also shown that the pollution in the middle Zishui River is serious, that the water quality of the tributaries of the upper Yuanjiang River is poor, and that the water quality of the Lishui River is good.