论文部分内容阅读
[目的]通过对地表水源水的检测结果分析并提出建议,为地震灾后政府制定生活饮用水卫生安全措施提供依据。[方法]横断面调查,对唐家山堰塞湖泄洪前后一日的地表水源水检测结果进行对比分析。[结果]绵阳地表水源水泄洪前符合Ⅱ类水质要求,泄洪后铁、锰分别超标21.9倍和26.5倍,总氮、总磷和粪大肠菌群分别超标1.8倍、0.2倍和0.63倍,氯化物、敌敌畏等项目低于标准限值。[结论]铁、锰、总氮、总磷和粪大肠菌群超标是唐家山堰塞湖泄洪后绵阳地表水源水质较差的主要原因。建议扩大地表水源水的监测范围和增加监测频率,及时从源头掌握水质状况及主要污染物的变化。
[Objective] Through the analysis and suggestion on the test results of surface water and source water, it provides the basis for the government to formulate sanitary and safety measures of drinking water after the earthquake. [Method] A cross-sectional survey was conducted to compare and analyze the surface water source water test results on the day before and after discharge of the Tangjiashan barrier lake. [Result] The surface water source water of Mianyang met Grade Ⅱ water quality before flood discharge, and the contents of iron and manganese exceeded 21.9 times and 26.5 times respectively after flood discharge. The total nitrogen, total phosphorus and fecal coliform exceeded 1.8 times, 0.2 times and 0.63 times respectively, Chemicals, dichlorvos and other items below the standard limit. [Conclusion] Excessive iron, manganese, total nitrogen, total phosphorus and fecal coliform were the main reasons for the poor surface water quality of Mianyang Mianyang after the flood discharge at Tangjiashan barrier lake. It is suggested that the monitoring area of surface water should be expanded and the frequency of monitoring be increased so that the quality of water and the changes of major pollutants can be timely grasped from the source.