前置库在滇池非点污染源控制中的应用研究

Study in Applying Pretank to Non-point Pollution Control in Lake Dianchi

本文对前置库控制滇池富营养化的非点源负荷进行了典型研究，结果表明：仅需投资３８６万元对明通河、宝象河流域现有水库、水塘和洼地进行改造，即可建设总有效库容为１３３．３万立方米的三个前置库，每年可拦截总磷１１～１９吨、总氮９６～１６０吨、悬浮物１５００００吨；拦截的地表污水还可灌溉周围的农田９０００多亩，具有较高的经济和环境效益。

A research has been carried out to study what pretank can do to the eutrophic nonpoint pollution loads in Lake Dianchi.The typical result suggests that it is only necessary to invest 3.86 million yuan to reconstruct the existing reservoirs,ponds and hollow lands so that three pretanks can be built,which effective capacity is totally 1.333Mm3.Every year they can intercept 11-19 tons of TP,96-160 tons of TN,150000 tons of SS;the intercepted surface sewage can be recycled to irrigate more than 9000mu of surrounding farmlands.It brings about high economic and environmental benefits.