湘江长沙段2000_2005年水质监测情况动态分析.pdfVIP

1122 实用预防医 2008年8 月 第 15 卷 第4 期 Practical Preventive Medicine, Aug. 2008, Vol 15,No. 4 文章编号: 1006- 3110(2008)04- 1122- 04 湘江长沙段2000- 2005 年水质监测情况动态分析 , , : 了解湘江长沙段水质情况, 为治理污染和城市建设与发展提供科 数据。 按清洁、污染、自 净三个监测断面分丰水期和枯水期两个时期采集表层水样, 按地表水环境质量标准及检测要求检验和评价。 湘 江长沙段三个断面水质情况污染情况均很严重; 造成污染主要为大肠菌群、汞、挥发酚、镉和氨氮等项 目; 枯水期氨氮、挥 发酚、镉、大肠菌群污染显著高于丰水期(P 0. 01~ P 0. 05) , 两时期汞污染均严重, 但丰水期更甚(P 0.01) 。2000 年 和2005 年上游监测点超标指数超过中下游, 提示上游城市污染影响严重。 湘江长沙段水质污染严重, 多项指标 超过地表水3 类水质标准,应引起政府和相关部门重视。 : 湘江; 水质; 监测; 污染 中图分类号:R 123. 5 文献标识码:A DynamicAnalysis of Water Quality in Changsha Part of Xiang River form 2000 to 2005 LIN Xi - j ian, ZH U Cai - ming, TAN Liang ( Changsha Municipal Center for Disease Control an Prevention, Changsha 410001, Hunan, China) Abstract: Objective To understand the water qua lity in Changsha p art of Xiang River, and to provide scientific ba sis for c ontrolling pollution, and c onstructing and deve loping the city. Methods Water sample s were c olle cted at thre e se c2 tions of c lean, pollution and self- purific ation in wet and dry se a sons to dete ct and evaluate water qua lity ba sed on the env2i ronmental quality standar ds and te sting requirements for surfa ce water. Results Water qua lity of thre e sections in Changsha part of Xiang River was seriously pollute d. The main pollutants were c oliform, mercury, volatile phenol, cadmium, and am2 monia nitrogen, etc . The pollution of ammonia nitrogen, volatile phenol, ca dmium, and coliform in dry se ason wa s significant2 ly higher than that of the wet p eriod( P 0. 01~ P 0. 05 . Mercury pollution wa s serious in the two s