Analysis on erosion-deposition variation of Yichang-Shashi reach after impoundment of TGP
Analysis on erosion-deposition variation of Yichang-Shashi reach after impoundment of TGP
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发表时间：
2010
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通讯作者：
Guo Huanlin
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作者：
Guo Huanlin
三峡工程蓄水后，来水来沙量急剧减少，采用断面地形法分析了宜昌至沙市河段的冲淤变化，并从来水来沙过程、床面形态、床面组成、比降等方面研究了冲淤变化的影响因素，结果表明，宜昌至沙市河段的冲淤变化受水流泥沙的影响，各河段冲淤变化受各影响因素的影响程度不同，枝城至沙市河段冲淤强度大于宜昌至枝城河段。
The discharge sediment amount decreases sharply after impoundment of TGP.We analyzed erosion-deposition variation of Yichang to Shashi reach using cross section topography method,and studied the influential factors of erosion-deposition variation in the aspects of inflow water and sediment process,bed configuration,bed composition and gradient ratio.The results show that erosion-deposition variation is influenced by river flow and sediment,bed composition and bed configuration comprehensively,in which the remarkable decrease of inflow sediment is dominate;the influential factors in different reaches affect the erosion-deposition variation in different degrees,and erosion-deposition intensity of Zhicheng to Shashi reach is larger than that of Yichang to Zhicheng reach.