钱塘江(杭州段)粪大肠菌群污染现状研究

Analysis of pollution of fecal coliform in Qiantang river(Hangzhou section)

目的:从卫生学角度出发,通过对钱塘江(杭州段)流域地表水不同季节、不同河段、不同潮汐等条件粪大肠菌群连续动态监测,探究其粪大肠菌群污染的诸多因素,为加强钱塘江水体污染监管提供科学的依据。方法:按照国家环保局《水和废水监测分析方法》第四版要求,进行粪大肠菌群的监测。结果:以粪大肠菌群Ⅲ级地表水标准,平均达标率为61.0%,2006年-2009年粪大肠菌群四年达标率依次为54.2%、56.9%、59.4%、74.0%,呈逐渐上升趋势。河段上游水体粪大肠菌群达标率高于下游,四季粪大肠菌群达标率呈冬、春、秋、夏依次降低。结论:钱塘江(杭州段)地表水粪大肠菌群污染状况仍较为严重,呈逐年上升趋势。虽然污染状况在日趋改善,但新的污染仍在不断滋生,加强污染源的监管和水体的动态监测仍是我们工作的重点。

Objective：In the view of hygiene,through the continuous dynamic monitoring of fecal coliform in surface water of Qiantang River（Hangzhou section） in different seasons,different sections and different tidal conditions,to explore the factors of fecal coliform pollution,in order to provide a scientific basis to strengthen the control of Qiantang River water pollution.Methods： According to ＂Water and Wastewater Monitoring and Analysis Methods＂（4th edition） of National Environmental Protection Administration,fecal coliform in surface water of Qiantang River（Hangzhou section） was monitored.Results： According to the surface water Ⅲ level standard for the fecal coliform,the average attainment rate is 61.0%.From 2006 to 2009,the attainment rates of fecal coliform in four years were 54.2%,56.9%,59.4% and 74.0%,showing a gradual uptrend.The attainment rate of fecal coliform in upstream river water is higher than that of downstream,and the attainment rates in four seasons reduced accordingly in the order of winter,spring,autumn and summer.Conclusion： The pollution of fecal coliform in Qiantang River（Hangzhou section） is still serious,increasing year by year.The condition of pollution was increasingly improved,but the new pollution continue to breed.Strengthening the regulation of pollution sources and dynamic monitoring of water are still the focus of our work.