滇池水源地农田径流污染控制工程的研究

Research on the Controlling Project of Agricultural Runoff Pollution in the Water-Source Region of lake Dianchi

本文研究滇池湖区农田径流中污染物氮、磷和泥沙等的控制工程净化规律及去除效果，并以ＴＮ、ＴＰ、ＴＤＮ、ＴＤＰ、ＳＳ和ＣＯＤｃｒ六项监测指标为对比研究依据，进行了一个水文年的连续试验工作，结果表明：（１）工程系统的水质处理效果可达到或超过常规二级处理水平，系统对ＴＮ、ＴＰ、ＴＤＮ、ＴＤＰ都有较好的去除效果；（２）工程系统对农田径流中各种污染物的去除率高低有别，按顺序排列为：ＴＰ＞ＴＤＰ＞ＴＤＮ＞ＴＮ＞ＳＳ＞ＣＯＤｃｒ。

The reqularity of purification and removal consequence of the controlling project on silt and contamination as Nitrogon and Phosphorus from agricultural runoff in the basin of Lake Dianchi are studied ,moreover,a consecutive experimental study has been achieved,which last one hydrologic year and chose 6 monitoring indices of TN,TP,TDN,TDP,SS and COD cr as the basis of comparative study Results from the running of the controlling project show that:(1).water quality treating consequence of the system can approach or exceed the ordinary 2-class treating level;(2).the system has different removal rate as far as different contaminant is concerned ,and the order is TP>TPD>TDN>TN>SS>COD cr 。