黄河小浪底水库库区水流泥沙运动规律分析

Regularity of water flow and sediment motion in Xiaolangdi Reservoir region on Yellow River

结合1997～2001年黄河小浪底水库库区水文泥沙测验资料,采用水文分析的方法,分析施工运用期、蓄水运用初期等不同时期库区各因子站的水流泥沙运动特征、库区泥沙淤积量及其淤积形态和水库初期运用的回水影响等,并着重分析2000年洪水期含沙量变化过程以及库区泥沙淤积上延现象,初步得出库区不同时期的水流泥沙运动基本规律.由于受当时设站规模的限制,库区水文泥沙资料尚存在不足.今后需加强小浪底水库泥沙淤积状况的监测,收集更广泛的库区水流泥沙资料,为制定小浪底水库运行调度方式奠定基础.

Based on the data from hydrological and sediment observation performed for the Xiaolangdi Reservoir region from 1997 to 2001, the characteristics of water flow and sediment motion at each hydrographic station during the construction period and the early storage period of the reservoir, the amount and pattern of sediment deposition in the reservoir region, and the backflow effect during the early operating period are analyzed by use of the hydrological analysis method, with emphasis placed on the variation of sediment concentration and upstream extension of sediment deposition during the flood period of 2000. The research primarily reveals the basic regularity of water flow and sediment motion during different periods of the reservoir region. Owing to the restriction of the scale of the constructed stations, the hydrological and sediment data of the reservoir region are inadequate. Hence it is necessary to strengthen the monitoring of sediment deposition in the Xiaolangdi Reservoir and collect more water flow and sediment data for the reservoir region, so as to provide a basis for formulation of a reasonable operation mode for the Xiaolangdi Reservoir.