白鹤滩水电站泥沙特性研究

库区泥沙输移特性以及演变趋势对水电站运行至关重要,利用白鹤滩水电站入库泥沙控制站的最新水文泥沙资料,采用输沙率经验公式计算与水槽模型试验等方法,对水库泥沙输沙量、颗粒级配及矿物成分等特性进行了分析研究。结果表明:白鹤滩水电站坝址多年平均悬移质输沙总量为1. 69亿t,其中支流输沙量约为1 100万t,占坝址输沙量的6%左右;推移质输沙量约为214万t;受上游兴建水利工程影响,近年来坝址输沙量有所减少。研究成果对白鹤滩水电站运行以及梯级水库调度具有较大意义。

Study on sediment characteristics of Baihetan Hydropower Station

Sediment transport characteristics and its evolution trend in the reservoir are of great importance to the operation of hydropower station. Based on the updated hydrological and sediment data collected by reservoir sediment control station, we analyzed the volume of sediment, grain gradation and mineral composition using transport rate formula and flume model test. The results show that the multi-year average suspended sediment discharge at the Baihetan dam site is about 169 million tons, 11 million tons of which come from the tributaries, accounting for about 6% of total sediment. The multi-year average bed load discharge is around 2.14 million tons. Due to water conservancy projects constructed upstream, the volume of sediment transported has reduced in recent years.