黄腊溪饮用水源地非点源污染及水环境容量初探

以四川省大英县隆盛镇黄腊溪饮用水源地为研究对象，根据当地丰水期的实际情况和实测数据建立了一维水质模型。测试结果表明，8月CODcr、TN和9月TN已超过地表水Ⅲ类水质目标。结合水环境容量计算公式得知：8月上中旬污染物中CODcr和TN各需要削减408．25t·a^-1和2．52t·a^-1的入河量，而9月则应削减110．92t·a^-1的TN入河量才能满足当地饮用水水源地标准。最后针对污染源的排放情况提出相应的水环境防治对策和建议。

Researches on Non-point Source Pollution and Water Environment Capacity of Drinking Water Source Area in Huanglaxi River

Huang Laxi drinking water source area,which locates at Longsheng town in Sichuan province,is considered as the research object. According to the local practical situation in wet season and the measured data, a one-dimensional water quality model is set up. Survey data show that the TN and CODcr in August and the TN in September have surpassed surface water Ⅲ kind of water quality goal. By means of water environmental capacity tormula, the water environmental capacity is calculated. The resuhs show that the TN and CODcr in August should be reduced 2.52 t · a^- 1 and 408.25 t · a^- 1 respectively, and the TN in September should be reduced 110.92 t · a^- l to meet the standards of the local drinking water sources. Corresponding water environment prevention countermeasure and suggestion to the emissions of pollution sources are proposed.