摘要
河流上修建水库后,由于水库对水流和泥沙的调节作用,使得进入下游的水沙过程发生变化。如洪峰流量减小,流量过程调平,水流含沙量急剧减小等,结果引起河道一系列新的调整变化,对河流的生态环境造成一些影响。以美国格伦峡水库为例,分别从下游水沙变化、下游河道冲刷及河道平面变化等几个方面对建坝给下游河道河流健康的影响进行初步分析。并结合国内外河流健康评价模型,根据格伦峡的实际情况对其对科罗拉多河河流健康的影响进行量化评价。
The construction of dams, by its regulation of flow and sediments, lead to a series of changes to the rivers such as the decrease of peak discharge and sediment concentration and the leveling the discharge process, which would have some impacts on the river health. The river health impact analysis on construction of the Glen Canyon Dam is given in the aspects of the changes of sediment, water and river channel and the erosion downstream. And the river ecosystem health assessment methods home and abroad are applied to assess the river health condition of Colorado River after the built of Glen Canyon Dam.
出处
《科学技术与工程》
2008年第11期2920-2925,2927,共7页
Science Technology and Engineering
基金
2007年财政部专项项目资助
关键词
格伦峡
下游河道
河流健康
水沙变化
冲刷
Glen Canyon Dam changes of flow and sediment river channel downstream river health assessment
