绪言泥沙运动,或者更明确地说,泥沙在明渠中的运动,是一种水力学的现象,一百年来,它已经被学者和工程师们广泛地研究了。这些研究的绝大多数集中于泥沙在水槽中的运动,或者在于解决一个特殊的泥沙运动问题。然而,经常需要一个简易的计算整个河段中泥沙运动的实用方法。更明确地说,要求有一种方法,来确定河流沿程冲刷和淤积的范围和识别由于泥沙运动引起的水位流量关系曲线变化趋势。威廉·A·托马斯(William A.Thomao)已经提出了一个分析模型“河流和水库中的冲刷与淤积”, Introduction Sediment movement, or more specifically, the movement of sediment in open channels, is a hydromechanical phenomenon that has been extensively studied by scholars and engineers for a hundred years. The vast majority of these studies focus on sediment movement in the sink or in solving a particular sediment movement problem. However, there is often a need for a simple and practical method of calculating sediment movement throughout the river. More specifically, there is a need for a methodology to determine trends in the range of erosion and deposition along the riverine and to identify changes in the water-level and flowrate due to sediment movement. William A. Thomas has proposed an analytical model, Scouring and Sedimentation in Rivers and Reservoirs,