基于ArcGIS的牛栏江—滇池补水工程对滇池水环境改善效果分析

Impact of Niulan River-Dianchi Lake water Supplement Project on Water Quality of Dianchi Lake based on ArcGIS

利用2009—2015年滇池水质监测资料,结合ArcGIS空间插值方法,分析评价牛栏江-滇池补水工程对滇池水环境改善效果。结果表明:牛栏江-滇池补水工程运行后,滇池外海的氨氮、总氮、高锰酸盐指数和总磷平均浓度分别下降47.9%、28.3%、22.0%和48.2%,水质明显好转;滇池外海中部、南部水域水质优于北部水域,西部水质优于东部,补水工程对滇池水环境改善效果明显。

By integrating the water quality monitoring data from 2009 to 2015 with spatial interpolation method of ArcGIS, the paper analyzed and evaluated the Niulan River - Dianchi Lake Water Supplement Project and its effect of improving the water quality of Dianchi Lake. The results suggested that the index of total nitrogen, ammo-nia nitrogen, permanganate, and total phosphorus contents decreased 47. 9% , 28. 3% , 22. 0% and 48. 2% re-spectively, accompanied with the overallimproved obviously water quality. In addition, in the surrounding area of Dianchi Lake, the water quality of the middle part and southern part was better than that of northern part, water quality of western part was better than that of eastern part. Those demonstrated that the supplement project had ob-vious effect on water environment improvement of Dianchi Lake.