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以不同粒径组的来沙量和淤积量的资料为基础,建立了三门峡-利津河段的年冲淤量与进入下游河道的年沙量的关系,从中得到了下游河道泥沙从存贮到释放的临界值.这一临界值随泥沙粒径组的变粗而减小.三门峡-利津河段的年冲淤量与进入下游河道的年沙量的相关系数值,随泥沙粒径组的变粗而增大,即来沙越粗,来沙量与河道淤积的关系越密切.单位输入沙量的变化所导致的淤积量增加量,随着粒径的变粗而增大.研究表明,在已经对大于0.05mm粗泥沙来源区进行治理并取得成效的基础上,集中治理大于0.10mm粗泥沙的产出区,具有重要意义.
Based on the data of sediment concentration and siltation in different particle size groups, the relationship between annual scour and silt deposition in the Sanmenxia - Lijin reach and the annual sediment input into the downstream reaches was established. From the results, To the release of the critical value of the critical value decreases with the size of the sediment particle size group decreases.The Sanmenxia - Lijin Rebound and Sediment volume into the downstream channel annual sediment correlation coefficient values, with the sand The thicker and larger diameter groups, that is, the thicker the sediment, the closer relationship between sediment concentration and river siltation.The increase of siltation caused by the change of input sediment volume increases with the increase of grain size The research shows that it is of great importance to focus on the control of the output area of coarse sediment larger than 0.10mm after the control and effectiveness of the coarse sediment source area of more than 0.05mm have been achieved.