摘要
针对三峡水库运行以来,库区青岩子河段来水来沙条件和局部边界条件的变化,以及上游控制性工程运用对其冲淤变化规律和演变趋势的影响,利用实测资料分析青岩子河段在三峡水库运用以来的冲淤变化规律,并采用二维水沙数学模型对该河段控制性枢纽(三峡、溪洛渡、向家坝枢纽等)运用初期20 a(2008～2027年)的河床冲淤变化进行计算和演变趋势预测分析。结果表明,控制性枢纽运用初期,青岩子河段淤积幅度较小,河床平面形态与建库前相比变化不大,总体河势未发生明显变化。
After the impoundment of Three Gorges Reservoir,the incoming flow and sediment conditions and local boundary condition of Qingyanzi Reach have changed a great deal.In view of erosion-deposition variation law in Qingyanzi Reach influencing by impoundment of some controlling water conservancy projects,we conduct analysis on the erosion-deposition variation law by studying field date.Using 2D mathematic model of flow and sediment,the variation of riverbed deposition and erosion in the early 20 years after operation of the controlling water conservancy projects,such as Xiluodu Hydropower Station and Xiangjiaba Hydropower Station etc.on Jinsha River,are computed and the riverbed evolution trend is analyzed and predicted.The results show that in the initial period of the operation,the change amplitude of riverbed deposition in Qingyanzi reach is small;the riverbed plane configuration changes a little comparing with the situation before;the overall regime does not change greatly.
出处
《人民长江》
北大核心
2011年第9期81-86,共6页
Yangtze River
基金
水利部公益性行业科研专项经费项目(200901006)
关键词
变动回水区
水沙数学模型
河床冲淤
控制性枢纽
三峡工程
fluctuating backwater area
mathematic model of flow and sediment
erosion-deposition of riverbed
controlling water conservancy projects
Three Gorges Project
