梯级电站建设运营对下游水质的影响  

Effect on Water Quality at Downstream of the Building and Operation of Cascade Hydro-power Stations

作　　者：陈建发[1] 颜斐进 方胜强[3] 吴文炳[3] 

机构地区：[1]漳州职业技术学院食品与生物工程系,福建漳州363000 [2]福建省漳州市产品质量检验所,福建漳州363000 [3]漳州师范学院化学与环境科学系,福建漳州363000

出　　处：《长江大学学报（自科版）（中旬）》2012年第1期47-49,6,共3页Journal of Yangtze University(Nature Science Edition)

基　　金：漳州职业技术学院与漳州市环境保护局科学研究资助项目(ZZY0801)

摘　　要：在利水电站库区上游、库区、坝上、坝下布设监测断面,进行为期近2个月的枯水期水质监测,通过分析上下游水质的变化,研究了梯级电站的建设与运营对下游水质的影响。结果表明,各断面COD_(Mn)、DO、NH_3-N、总P均符合Ⅲ类水质标准,无明显大的变化,但随着水流方向呈变差的趋势。由此认为,梯级电站的建设运行,形成梯级水库,流速变缓,大气覆氧能力降低,水中溶解氧下降,导致水体自净能力变差,对污染物的稀释、混合和降解能力减弱,是造成电站下游水质变差的主要原因之一。The water quality of Jiulongjiang River was continually monitored for nearly two months in the dry season by establishing monitoring sections at the upstream,reservoir area,up-dam and down-dam of the Lishui hydropower station.The influences of the building and operating of the cascade station on the water quality of the downstream was further investigated by analyzing the variation of the water quality between the upstream and the downstream of the reservoir.The results showed that the values of COD_(Mn),DO,NH3-N and the total P amounts at all the sections were in accordance with GradeⅢwater quality,but the water quality changed worse along the stream. From this,it was supposed that the construction and operation of the hydropower station as well as the formation of the cascade reservoir slowed down the flow rate of the stream,decreased the enriching oxygen ability of the atmosphere and the dissolving oxygen capacity of the water,further reducing the self-purification ability of the water and the dilution,mixture and degradation functions to the pollutants,which might be one of the main reasons to explain why the water quality of the downstream of the station deteriated.

关 键 词：梯级电站 水质 下游 

分 类 号：X524[环境科学与工程—环境工程]