全球水库总库容估计7000km3。但由于水库淤积导致水库库容损失严重,每年库容损失占全水库库容的0.5%～1.0%。折合水库库容45km3,相当于每年需要130亿美元造300座大水库才能弥补这些库容的损失。泥沙淤积占用的有效库容与日俱增,造成巨大损失,因此,对水库泥沙淤积问题的研究刻不容缓。 The total global reservoir capacity estimated 7000km3. However, due to the siltation of reservoirs, the loss of reservoir capacity is serious, accounting for 0.5% -1.0% of the total reservoir capacity. Equivalent to 45km3 of reservoir capacity, equivalent to annual needs of 130 billion US dollars to build 300 large reservoirs to make up for the loss of these storage capacity. The effective storage capacity of sediment deposition is increasing day by day, resulting in huge losses, therefore, the research on reservoir sedimentation problems urgently.