小浪底水库分期运用对库区及河道冲淤的影响

发布时间：2019-01-01 21:15

【摘要】：黄河中下游洪水泥沙主要来源于汛期,受汛期不同时段降雨的影响,小浪底水库入库洪水泥沙具有明显的分期特性。通过优化小浪底水库汛限水位策略,研究水库汛期分期运用,有利于提高洪水资源化利用效率,对充分发挥水库综合效益具有重要意义。小浪底水库开发任务以防洪、减淤为主,优化水库汛期运用必须考虑其对库区及黄河下游河道的冲淤影响。拟定不同的分期运用方案,以水库进入正常运用期为背景,通过数学模型分别对库区及下游河道进行冲淤计算。从计算结果来看,进入正常运用期后,小浪底水库调节能力有限,每年9月10日后,入库含沙量较低,适当抬高运用水位对库区及黄河下游河道冲淤影响不大。
[Abstract]:The flood sediment in the middle and lower reaches of the Yellow River mainly comes from the flood season, which is influenced by rainfall in different periods of the flood season, and the flood sediment of Xiaolangdi Reservoir has obvious phased characteristics. By optimizing the strategy of limited water level in flood season of Xiaolangdi Reservoir and studying its application by stages in flood season, it is beneficial to improve the efficiency of utilization of flood resources, and it is of great significance to give full play to the comprehensive benefit of reservoir. The development task of Xiaolangdi Reservoir is to prevent flood and reduce siltation. In order to optimize the operation of reservoir during flood season, the influence of scouring and silting on reservoir area and the lower Yellow River must be considered. In the background of reservoir entering into normal operation period, the scour and deposition of reservoir and downstream river are calculated by mathematical model. From the calculation results, after entering the normal operation period, the regulation capacity of Xiaolangdi reservoir is limited, after September 10 every year, the sediment content in the reservoir is relatively low, and the appropriate elevation of water level has little effect on the scour and siltation of the reservoir area and the lower Yellow River.
【作者单位】：黄河勘测规划设计有限公司;
【基金】：国家重点研发计划项目(2016YFC0402501) “十二五”国家科技支撑计划项目(2013BAC10B02)
【分类号】：TV14;TV882.1

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