沙湖水体污染现状及对策分析

本文对沙湖水体营养盐来源进行了调查分析,结果表明:①黄河水、农田退水的补给是沙湖营养盐的主要来源;②2004年由黄河水补给入湖的总氮、总磷量分别为20.00t和3.04t,占全年入湖总氮、总磷量的50.4%和57.7%;③2004年由农田退水补给入湖的总氮、总磷量分别为15.00t和2.00t,占全年入湖总氮、总磷量的37.8%和37.9%;④2004年由芦苇收割和渔业捕捞出湖的总氮、总磷量分别为11.99t和1.93t,占全年入湖总氮、总磷量的30.2%和36.6%;在调查沙湖营养来源的基础上,建立沙湖水质经验模型并分别对模型进行验证,结果表明,OECD模型能较好预测沙湖水体总磷、总氮浓度。最后利用该模型,对所提出的沙湖水体富营养化防治方案进行计算分析比较,并确定合适的防治方案。

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.