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本文提出了一种计算水库泥沙淤积的简易方法,用于计算运行年限内的库容损失或水库的使用寿命。在估算水库使用寿命时,通常采用布鲁恩(Brune)拦沙效率曲线。本文作者所推导的近似代数式,将瞬时库容与运行年限以及其它有关参数(年径流和年输沙量、初始库容、泥沙平均容重等)联系起来,使得用此曲线的计算工作大为简化。 (一)方法介绍淤积形成库容损失的时间变率为;
In this paper, a simple method of calculating sediment deposition in reservoirs is proposed to calculate the loss of reservoir capacity or the service life of reservoirs during the operational life span. Brune sediment retention efficiency curves are often used in estimating reservoir life. The approximate algebraic formula derived by the author of this paper correlates the instantaneous reservoir capacity with the number of years of operation and other relevant parameters (annual runoff, annual sediment load, initial reservoir volume, average sediment load) and simplifies the calculation using this curve. (1) The method introduces the time variability of the storage capacity loss caused by siltation;