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目的了解唐家山堰塞湖泄洪后湖内水质状况,及对下游绵阳城区生活饮用水水源的影响。方法按生活饮用水标准检验方法对26份湖内及相关河流水样进行检测分析。结果26份水样中,Ⅲ类水质7份、Ⅳ类水质9份、Ⅴ类水质9份、低于Ⅴ类水质标准的水样1份,无Ⅰ类、Ⅱ类水样。37项次在Ⅳ、Ⅴ类标准范围内,其中五日生化需氧量9项次、总磷5项次、总氮13项次、石油类8项次、化学需氧量1项次、粪大肠菌群1项次。毒理指标和一般化学指标全部符合Ⅰ类地表水质标准。结论唐家山堰塞湖湖水有机性污染较重,未受到化学物质的污染,对绵阳城区生活饮用水水源安全卫生不构成威胁。
Objective To understand the lake water quality after the discharge of Tangjiashan barrier lake and the impact on the source of drinking water in Mianyang urban area. Methods Twenty-six water samples from the lake and related rivers were tested and analyzed according to the standard test method of domestic drinking water. Results Among the 26 water samples, there were 7 water samples of Grade Ⅲ, 9 water samples of Grade Ⅳ, 9 water samples of Grade V, 1 water sample lower than the water quality standard of Grade V, and no water samples of Category Ⅰ and Ⅱ. 37 times were in the range of Ⅳ and Ⅴ standards, of which there were 9 biochemical oxygen demand on the 5th, total phosphorus 5, total nitrogen 13, petroleum 8, chemical oxygen demand 1, manure Coliform 1 times. Toxicological indicators and general chemical indicators all meet Class I surface water quality standards. Conclusion Tangjiashan barrier lake water organic pollution is heavy, not subject to chemical pollution, drinking water sources in Mianyang city is not a threat to the health and safety of drinking water.