过去20年东江水质演变趋势  

The Change of the Water Quality of Dongjiang River in the Past Twenty Years

作　　者：曾凡棠[1] 张修玉[1] 许振成[1] 黄生志[2] 张强[2] 张恒军[1] 房怀阳[1] 汪中洋[1] 

机构地区：[1]环境保护部华南环境科学研究所,广东广州510655 [2]中山大学水资源与环境系,广东广州510275

出　　处：《环境科学导刊》2012年第6期38-41,98,共5页Environmental Science Survey

基　　金：国家科技重大专项"水体污染控制与治理"河流主题之"东江流域水污染控制与水生态系统恢复技术与综合示范项目"课题10(2008ZX07211-010);环保公益性行业科研专项"基于分区管理的生态文明建设指标体系和绩效评估方法研究"资助

摘　　要：饮用水源河流水质演变是流域水污染防治与水资源管理的重要研究内容。分析了过去20年东江水质变化趋势。结果表明:①过去20年东江干流水质总体良好,但近年来变差趋势较明显;东江干流由上而下表现出较明显水质变差趋势。②2003～2010年东江干流各段水质基本在Ⅱ～Ⅲ类;其中上游河段基本维持在Ⅱ类,中下游部分指标达到Ⅲ类。The water quality change of the river used for providing the drinking water is crucial for the water pollu- tion prevention and control as well as the water resources management within its river catchment. In this article, the change of the water quality of Dongjiang River in the past twenty years has been analyzed. It shows that 1 ） the wa- ter quality of its mainstream has been kept good in the past 20 years, but it has been getting worse i~ recent years. From the upper to the lower mainstream, there is a clear trend of the water quality to get worse. 2） during 2003 - 2010, the water quality of the river mainstream has stayed at Grade II - III. Its upstream has maintained at Grade II, but for the downstream some indexes have reached Grade Ⅲ.

关 键 词：水质 演变 趋势 东江 

分 类 号：X52[环境科学与工程—环境工程]