泥沙研究

针对水库优化调度的泥沙问题，建立了白鹤滩水库一维水沙数学模型，开展了不同运行水位下白鹤滩水库排沙能力变化等的模拟研究。研究表明：7—8月，无论是大水还是小水过程，白鹤滩水库排沙能力均较小，水库不具备调度排沙条件；7—8月白鹤滩水库变动回水区泥沙淤积量及占比均相对较小，有利于水库开展优化调度。汛期7月，库水位低于805 m时变动回水区淤积量及占比均很小，库水位高于805 m后变动回水区淤积占比开始逐步增大，但淤积量仍然很小；蓄水期8月，白鹤滩水库变动回水区淤积占比会随起蓄水位抬高而增加，但变动回水区淤积量较小。研究成果可为水库优化调度提供参考。

A one-dimensional mathematical model of water and sediment in Baihetan Reservoir was established to address the issue of sediment in optimized reservoir scheduling. Simulation studies were conducted on the changes in sediment discharge capacity of Baihetan Reservoir under different operating water levels. Simulation results shows that, whether it is a large or small water process, the sediment discharge capacity of Baihetan Reservoir is relatively small from July to August no matter incoming large or small water processes, the reservoir does not have the conditions for regulating sediment discharge. However, the sediment accumulation and proportion in the fluctuating backwater area of the reservoir from July to August are relatively small, which is conducive to the optimizing the reservoir operation. During the flood season in July, when the reservoir water level is below 805 m, the sedimentation amount and proportion in the fluctuating backwater area are very small;, when the reservoir water level is above 805m, and the sedimentation proportion in the fluctuating backwater r area gradually increases, although the sedimentation amount is still very small. During the water storage period in August, the proportion of sedimentation in the fluctuating backwater area of Baihetan Reservoir will increase with the rise of the storage level, but the amount of sedimentation there is relatively small. The research results can provide reference for optimizing the operation of reservoirs.