城市生活污染对浏阳河长沙城区段水质的影响

对浏阳河长沙城区段的水质现状和污染来源进行了调查。结果表明,浏阳河河水流经长沙城区后,氨氮和总磷浓度分别升高了9.49倍和7.75倍,但铁、锰和高锰酸盐指数等其他监测指标无显著变化。浏阳河长沙城区段的污染主要是由于区域内生活污水直接排入和污水处理厂尾水排入导致清污比例严重失调引起的,城市生活污染对浏阳河长沙城区段水质下降的贡献最大。此外,湘江长沙综合枢纽工程库区回水的顶托作用对浏阳河长沙城区段水质也有一定影响。

Effects of Urban Living Pollution on Water Quality of Changsha Urban Section of Liuyang River

Water quality and pollution source of Changsha urban section of Liuyang River were investigated. Results showed that the concentration of ammonia nitrogen and total phosphorus was respectively increased by 9.49 times and 7.75 times, but the iron, manganese and permanganate index had no significant change in Liuyang River after flowing through the area of Changsha city. The pollution of Changsha urban section of Liuyang River was mainly due to the serious imbalance of the proportion of water and wastewater, which caused by direct discharge of rural domestic sewage and tail water from the sewage treatment plant, urban living pollution was the biggest contributor to the water quality decline of Changsha urban section of Liuyang River; In addition, the rise of water level influenced by the Xiangjiang Changsha comprehensive hub project reservoir also had effect on the quality of Changsha urban section of Liuyang River.