淤地坝相对稳定模型实验研究

根据黄土高原典型小流域的水沙条件 ,建立概化的室内比尺模型 ,通过多次放水实验后对沟道沟底高程、沟底平均比降以及坝前淤地的平均高程等参数进行测量。对测量数据分析发现 ,随着放水次数的增加 ,各参数变化越来越缓慢 ,最终达到相对稳定 ,从而验证了淤地坝实现泥沙冲淤平衡、达到相对稳定的可能性。分析了促使淤地坝实现水沙相对稳定的原因

Study on Model Test of Relative Stability of Warping Dams

It builds generalized scale model in doors according to the conditions of water and sediment of typical small watersheds in Loess Plateau. It measures the parameters of elevation of gullies and gully bottom, average gradient of gully bottom and average elevation of warping before the dam through several tests. It is found through analysis on observed data that along with the increase of numbers of drawing off water, the changes of parameters become slower and slower until to relative stable. It verifies the possibility of realizing the balance of scouring and deposition and reaching relative stable by warping dams. The paper analyzes the cause of realizing relative stable of water and sediment by warping dams.