高含沙洪水造床规律及河相关系研究

利用黄河实测资料，并结合黄河花园口至东坝头河道动床模型试验，研究了黄河下游高含沙洪水造床规律，河相关系及高含沙洪水期窄深河槽演变过程，明确指出：高含沙洪水期形成的窄深河槽难以长久维持下去，而且高含沙洪水形成的窄深河槽是以前期河床的严重淤积为代价的，对河道的破坏作用惨重。如何小浪底水库采用高含沙洪水加大排沙入海的运用方式可能会对下游河道的演变和下游防洪带来很多不利利的影响，对此应持慎重态度。

Study of Bed Building Law of Hyperconcentrated Flood and River Facies Relation

The bed building law by hyperconcentrated flood, river facies relations and the narrow and deep river channel evolution under hyperconcentrated flood in the lower Yellow River are analyzed and studied in the paper by using the Yellow River recording data and combining with the movable bed model experiment of Huayuankou to Dongbatou of the Yellow River. The results demonstrate that the narrow and deep channel built by hyperconcentrated flood is at the costs of severe sedimentation on earlier channel, is of serious damage to river channel and can not be maintained for long time. There may be lots of disadvantageous impacts on the lower Yellow River channel and flood prevention if hyperconcentrated flood would be created in Xiaolangdi reservoir to enhance sediment release into the sea, therefore it should be cautiously considered.