水库有效库容是其综合效益的基础。减慢有效库容损失,甚至长期保留一部分有效库容是淤积控制的主要内容之一。控制淤积的基本手段是在不影响水库基本兴利目标的前提下利用一切有利时机排沙。除个别中小型水库可采用机械清淤或截走浑水只蓄清水外,其它水库均只能靠水流排沙。水库是否具有长期保留库容的条件有三:一是水库调节系数要小,洪水时允许一定时间 The effective reservoir capacity is the basis of its overall efficiency. Slow down the effective loss of storage, and even long-term retention of part of the effective storage capacity is one of the main silt control. The basic means of controlling siltation is to use all favorable opportunities for sediment discharge without affecting the reservoir’s basic profit-making objectives. In addition to some small and medium-sized reservoirs can be mechanically dredged or truncated muddy water only save water, other reservoirs can only rely on water sediment discharge. There are three conditions for the reservoir to have long-term storage capacity: First, the reservoir regulation factor should be small, allowing a certain amount of time