嘉陵江中下游干流水电开发对水文情势的影响  

Impacts of hydropower development on hydrological regime in mainstream of mid-lower Jialing River

作　　者：刘扬扬[1] 李斐[1] 许秀贞[1] 

机构地区：[1]长江流域水资源保护局长江水资源保护科学研究所,湖北武汉430051

出　　处：《人民长江》2014年第5期10-15,共6页Yangtze River

基　　金：水利部公益性行业科研专项(201201067-2)

摘　　要：嘉陵江水能资源丰富，近年来水电开发力度加大。选取中下游干流的典型河段，研究了梯级电站运行对水域形态、径流、水位、流速、泥沙的影响。研究表明：梯级电站运行后，水库群的形成使水域面积增加近1倍；枯水期流量增加、水位上升，丰水期流量减少、水位下降，天然水文过程得到坦化。亭子口作为嘉陵江的龙头电站，它的运行对坝下河段水文情势产生了显著影响，各典型年月均出流量变幅在-46%~64%之间；梯级水库拦沙导致下游河段含沙量明显减少，对各电站大坝下游河床产生一定的冲刷影响。Jialing River is rich in hydropower resources that have been developed considerably in recent years. In this paper, some typical mainstream sections of mid-lower Jialing River were selected to investigate the impacts of hydropower development on morphology of waters, runoff, water level, flow velocity and sedimentation. It revealed that the water area almost doubled after operation of the cascade hydropower stations. In dry season, the stream flow increases and the water level rises, but contrariwise in wet season. As the leading hydropower station of Jialing River, the operation of Tingzikou significantly affected the hydrological regime in downstream river of the dam. The change in average monthly discharge varied between -46% and 64%. The signifi-cant reduction in downstream river sediment happened due to reservoir impoundment. Thus, the downstream riverbed of each dam could be eroded to a certain extent.

关 键 词：水文情势 梯级水库群 水电开发 嘉陵江 

分 类 号：TV213[水利工程—水文学及水资源]