安徽省巢湖市集中式供水水源地水质安全评价

Safety Evaluation for Water Quality of the Drinking Water Sources in Chaohu City,Anhui Province

巢湖是我国重要的淡水湖之一,是巢湖流域饮用水的直接来源,近年来随着富营养化的加重,巢湖屡次爆发蓝藻,严重影响了水质并制约着巢湖流域的经济发展,已越来越引起人们的重视.论文运用模糊数学法对2005年巢湖饮用水水源地水采集点A,B,C水厂水源水质监测数据进行了评价.结果表明,巢湖富营养化严重,特别是磷、氮和氨氮超标严重,其中A水厂的水质最好,但仍为Ⅳ类水质,长期无法达到饮用水源水质量标准,威胁着流域内饮用水安全.论文还提出了构建巢湖流域内的安全饮水保障体系的建议.

Chaohu Lake is one of the most important freshwater lakes in China. In recent years, Cyanobacteria bloom repeatedly broke out in Chaohu Lake, resulting in a bad influence on the water quality and constraining the economic development in Chaohu Watershed. Chaohu Lake is the main source of the drinking water in Chaohu Watershed and eutrophication threatens the safety of drinking water. In this paper, a comprehensive evaluation of three monitoring cross sections of the monitoring data in Chaohu Lake in 2005 was conducted by fuzzy mathematical method. The result showed that Chaohu Lake was heavily eutrophicated, and total phosphorus, total nitrogen and ammonia nitrogen, in particular, exceeded the standard for drinking water sources. Although the water quality of Section A was the best among three monitoring cross sections, its water quality was of Grade IV, which remains below the standard of drinking water for a long time. Some suggestions are put forward in this paper to insure the safety of the drinking water system.