【摘要】 本文从水利水保工程的拦沙机理入手,论述了水库和水土保持减少入黄泥沙的作用。通过分析计算得出目前入黄泥沙每年减少2亿t左右;如果今后60年在多沙地区仍按过去30年的速度治理,将保持或略高于目前的减沙水平,即60年后每年减少入黄泥沙4亿t左右。更多还原

【Abstract】 The benefit of reservior and water conservancy and soil conservation measures in reducing oncoming sediment to the Yellow River are dealt with in this paper from the angle of relation between rainfall and sediment yield and of sediment-retention mechanism. It is shown that oncoming sediment is reducing by 300 million ton per year. It is possible to reduce oncoming sediment by 400 million ton or more per year in future 60 years while sediment reduction is kept in harnessing level as in past 30 years.更多还原