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工程科学与技术:2009,41(1):47-53
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三峡蓄水初期宜昌枯水位稳定机理初步分析
(武汉大学水资源与水电工程科学国家重点实验室)
PAnalysis of Stability Mechanism of Yichang Low-water Level During TGP’s Initial Impoundment Period
(State Key Laboratory of Water Resource and Hydropower Engineering Science, Wuhan University)
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投稿时间:2008-03-24    修订日期:2008-05-10
中文摘要: 宜昌枯水位是影响葛洲坝船闸运行的重要参数。三峡蓄水初期,葛洲坝下游河床发生较大强度的冲刷,但宜昌枯水位未发生明显下降现象,其原因尚不十分清晰。本文通过分析三峡蓄水初期葛洲坝下游河床边界的变化认为,河床平面形态稳定、纵剖面形态的卡口作用、冲刷分布不均及河床阻力有所增加等是宜昌枯水位维持稳定的原因,其中在纵剖面形态的卡口作用影响下,未来宜昌枯水位发生大幅下降的可能性不大。
Abstract:Yichang low-water level was an important parameter connected with the operation of Gezhouba ship lock. It had kept stable while a huge amount of sediment erosion had been caused during TGP’s (Three Gorges Project) initial impoundment period, and its reason wasn’t very clear now. Analysis of the riverbed boundary condition changes was presented in this paper, and it showed that the stable planmetric figure, function of the bottle-neck reach, non-uniformity of the bed erosion, increase of the bed resistance were the main reasons for the stability of Yichang low-water level. Because of the function of the bottle-neck reach, there would be no big fall of low-water level at Yichang station.
文章编号:200800065     中图分类号:    文献标志码:
基金项目:国家基础研究重大项目基金
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葛华,李义天,朱玲玲,孙昭华.三峡蓄水初期宜昌枯水位稳定机理初步分析[J].工程科学与技术,2009,41(1):47-53.
gehua,liyitian,zhulingling,孙昭华.PAnalysis of Stability Mechanism of Yichang Low-water Level During TGP’s Initial Impoundment Period[J].Advanced Engineering Sciences,2009,41(1):47-53.