万家寨水库泥沙问题综合研究

采用类比分析、数学模型计算、物理模型试验等方法,对万家寨水库泥沙问题进行综合研究,结果表明:水库设有一定规模的泄流排沙装置;采用定期冲刷或日调节的运用方式,充分发挥大洪水的冲刷作用;控制淤积末端在较陡的河段内;水库可以实现冲淤平衡并长期使用,库区支流红河口不会形成拦门沙坎。正常高水位及死水位分别在980m和957m以下,汛期采用调水调沙运用时,可以保持2亿m~3以上的调节库容。

Comprehensive Study on Sedimentation of Wanjiazhai Reservoir

The sediment problem of Wanjiazhai Reservoir has been studied comprehensively by using the methods of analog analysis, mathematic model calculation and physical model tests. The results of the study show that the reservoir has the installations for sluicing and sediment discharging with a certain capacity; fully utilize the function of erosion in major floods by adopting the operational mode of periodically scouring or daily regulation; control the end of the deposition within a steeper river section; the balance of erosion and deposition of the reservoir can be realized for a long time use and a sill can not be formed at the river mouth of Honghe River, a tributary of the reservoir. The normal water level and dead level are below 980m and 957m respectively, therefore, more than 200 million cubic meter regulating storage can be kept if the operational mode of regulating water and sediment during flood season is adopted.