Analysis on Current Pollution Situation and Control Countermeasures for Shahu Lake

The pollution sources for Shahu Lake were investigated and analyzed in detail in this paper.The resultswere shown as follows:① The Yellow river waste water and the surface runoff to the Shahu Lake were the two main pollution sources.② 20.00tons of total nitrogen and 3.04tons of total phosphors from Yellow river flowed into Shahu Lake in 2004 which occupied 57.7% of the total phosphorsand 50.4% of total nitrogen flowed into t Shahu Lake.③15.00tons of total nitrogen and 2.00tons of total phosphors in the farm water flowed into Shahu Lake in 2004,which occupied 37.9% of the whole total phosphorsand 37.8% of whole total nitrogen flowed into Shahu Lake.④11.99tons of total nitrogen and 1.93tons of total phosphors were output from the reed and fish harvest in 2004.On the basis of investigation and analysis of the pollution sources in Shahu Lake,several experience models on the base of water quality data were established and verified by the experimental data in 2004 respectively.The results showed that the OECD model could be used to predict the TN concentration and TP concentration in Shahu Lake.So the OECD model was selected as the phosphorus and nitrogen model of Shahu Lake.Using the model,five countermeasures of controlling pollution were comparedand some better countermeasures were suggested finally.