三峡水库蓄水前后干流水质特征与变化趋势研究  

Research on water quality characteristics and variation of mainstream of Yangtze River before and after impoundment of Three Gorges Reservoir

作　　者：余明星[1] 邱波[1] 夏凡[1] 刘辉[1] 

机构地区：[1]长江水利委员会水保局长江流域水环境监测中心,湖北武汉430010

出　　处：《人民长江》2011年第23期34-38,共5页Yangtze River

基　　金：国家水体污染控制与治理科技重大专项项目(2009ZX07104-001);水利部公益性行业科研专项项目(200901013)

摘　　要：为了分析三峡水库蓄水前后水质的变化情况,选取三峡水库干流5个代表断面,通过2010年现状水质调查监测结果与1998～2009年历史水质资料的比较,深入分析了三峡水库蓄水前后干流水质特征和变化趋势。研究表明:目前三峡水库干流水质良好,年度水质为Ⅲ类;蓄水前以Ⅲ类为主,蓄水后以Ⅱ～Ⅲ类为主;从水库上游至下游,沿程水质逐渐趋好;蓄水后,总磷、高锰酸盐指数、铅等是影响水质的主要因子,与蓄水前相比,其沿程降低趋势更强,水质超标污染状况有所缓解。In order to analyze the variation trend of water quality in the mainstream of Yangtze River before and after inip（andment of Three Gorges Reservoir, 5 representative sections were selected and the water quality conditions were analyzed and the monitoring data of 2010 and the historical data from 1998 to 2009 were compared. The research results show that the water quality of the mainstream is good at present, annual water quality in III classification; mainly in 111 classification behfore impoundment and mainly in II -IIl classification after impoundment; from upstream to downstream, the water quality gradually improved. The indexes such as TP, CODMa, lead are the main factors influencing water quality and their concentration decrease more than that before impoundment, and the excessive water pollution is mitigated.

关 键 词：水库蓄水 干流水质 水质趋势 三峡水库 

分 类 号：X824[环境科学与工程—环境工程]