邛海水质变化趋势及保护对策研究

本文通过对邛海流域现状污染源进行调查,邛海流域COD、氨氮、总氮和总磷产生量分别为5892.1t/a、995.6t/a、2888.2t/a和1105.1t/a,污染负荷主要来自面源污染.通过2002 ～ 2011年邛海水质监测数据分析,邛海水质近10年总体保持Ⅱ～Ⅲ类,处于中营养状态,2004～ 2006年水质相对较差,2006年以后水质逐渐好转.总磷、总氮是邛海主要污染因子,海河口是邛海污染最严重的区域.为实现邛海水质和流域生态环境持续改善,从产业结构优化、流域污染源治理、生态保育和流域生态环境综合监管等方面提出对策建议.

Study on Change Trend and Protection Countermeasures of the Water Quality in Qionghai Lake Basin

According to current investigation of the pollution sources in Qionghai Lake, the generation amount of pollutants COD, ammonia nitrogen, total nitrogen and total phosphorus were 5892. lt/a, 995.6t/a, 2888.2t/a and 1105. lt/a in Qionghai Lake Basin, and the pollution load is mainly contributed by non - point source pollution. Based on the analysis of water quality monitoring data of Qionghai lake from 2003 -2012, the overall water quality remained between the second and third criteria, and the lake is at medium level of eutrophication. The water quality is relatively poor during 2004 - 2006, while TN and TP were the main pollution factors in Qionghai Lake, and the outlet area of Qionghai Lake was the worst polluted area. This study proposed some countermeasures and suggestions to improve the water quality and ecological environment of Qionghai Lake Basin from the aspects of industrial structure optimization, pollution sources treatment, ecological conservation, consolidated supervision of ecological environmental and etc.