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根据丘陵和山区卵砾石河流在水文泥沙，地质地貌方面的特点，将水流阻力划分为河床阻力，岸壁阻力与河道形态阻力，给出了相应阻力系数的模拟计算方法。除进行水流中悬移质和推移质运动的模拟外，还将河床划分为河床交换层，扰动层等四层。考虑河床表层中各组泥沙的起动及其隐曝系数、起动概率、可能的供应量对输移泥沙的制约作用，引用了河床交换层中的泥沙连续方程。模型用川江河道与水槽试验的资料进行检验，表明能较好地模拟这类河流的水流、泥沙输移与河床泥沙的冲淤，可满足一般水利水电工程设计研究的需要。
According to the features of hydrological, sediment and geology and geomorphology of the pebbly and gravel rivers in hills and mountains, the flow resistance is divided into riverbed resistance, shore resistance and river shape resistance, and the corresponding calculation method of resistance coefficient is given. In addition to the simulation of suspended matter and plutonic movement in the water stream, the riverbed is also divided into four layers, ie, the bed exchange bed and the disturbance bed. Considering the start of sediment in each layer in the river bed surface and its hidden exposure coefficient, starting probability and possible supply constraints on the sediment transport, the continuous sediment equation in the bed exchange is cited. The model is verified by the data of the Chuanjiang River Channel and the Sink Experiment, which shows that it can simulate the water flow, sediment transport and sedimentation of the riverbed well, which can meet the need of general water conservancy and hydropower project design and study.