牛栏江—滇池补水工程对滇池外海的水环境改善效果研究

Study of water environment improvement effect by Niulan River-Dianchi Lake Water Supplement Project in Waihai area of Dianchi Lake

利用牛栏江-滇池补水工程运行前后的水质实测资料,对滇池外海的水环境改善效果进行研究。选取TP、TN、NH_3-N、COD_(Mn)、Chl-a、SD等主要水环境指标,从指标浓度变化、水质类别变化、指标向好率变化和极大值变化等方面分析牛栏江-滇池补水工程对滇池外海的水环境改善效果。结果表明,牛栏江-滇池补水工程运行后,滇池外海各监测站点的TP、TN、NH_3-N、COD_(Mn)、Chl-a、SD及营养状态指数均优于调水前,富营养化水平明显好转,水环境改善成效显著。

This study focused on the water environment improvement in the Waihai area of Dianchi Lake based on measured data before and after the Niulan River-Dianchi Lake Water Supplement Project was implemented. Water environmental indices including TP, TN, NH3-N, CODMn, Chl-a, and SD were selected to assess the improvement effects in regard to the variations of index concentration, water quality classification, rate of indices that show improving values, and maximum values. The results show that TP, TN, NH3-N, CODMn, Chl-a, and SD, as well as the trophic level index improved after the water supplement project was implemented, and the level of eutrophication declined significantly, indicating that the Niulan River-Dianchi Lake Water Supplement Project had a marked effect on water environment improvement.