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异重流排沙是小浪底水库拦沙初期减少库区泥沙淤积的重要运用方式,异重流持续运动条件用于判断在不同水沙条件及库区地形条件下异重流能否运行到坝前而排出水库,是异重流排沙规律的主要研究内容之一.系统地总结了定性描述异重流持续运动条件的五方面内容,然后分析了现有异重流持续运动条件定量估计方法的不足.结合近年来小浪底水库异重流运行的观测资料,提出了用水流功率与库区平均水深定量表示异重流持续运动的临界条件,这种方法不仅考虑因素较为全面,而且能够充分反映库区地形特征对异重流持续运动的影响.
Isochronous sediment discharge is an important way to reduce the sediment deposition in the reservoir area during the early stage of sedimentation of Xiaolangdi Reservoir. The continuous flow conditions of heavy flow are used to judge whether the gravity flow can run to the dam under different conditions of water and sediment and the topography of the reservoir area It is one of the main research contents of the law of sediment discharge in different heavyweights.Fively, five aspects of qualitatively describing the continuous flow conditions of gravity flow are systematically summarized, and then the existing quantitative estimation methods of continuous flow conditions of heavy flow are analyzed In this paper, the critical conditions for continuous flow of heavy gravity flow are proposed by using the power of water flow and the average depth of water in the reservoir area combined with the observation data of Xishuangdian gravity flow operation in recent years. This method not only considers the factors more comprehensively but also fully reflects The Influence of the Topographic Features of the Reservoir Area on the Continued Movement of Crossflow.