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本文将正交曲线坐标系下的平面二维水沙数学模型和粘性河岸的冲刷模型结合 ,用于模拟弯道内的水流运动、悬移质泥沙的输移、河床的纵向及横向变形 .用水槽试验资料验证了本文提出的水流模型 ,结果表明流速分布、水位等计算结果与实测值相当符合 .应用建立的水沙数学模型以及河岸冲刷模型 ,模拟了一概化弯道在持续清水冲刷下的主流线位置、断面形态、主槽比降的变化过程 ,模拟结果符合弯道演变规律
In this paper, the two-dimensional mathematical model of two-dimensional flow and sediment in the orthogonal curvilinear coordinate system is combined with the erosion model of the cohesive bank to simulate the water flow in the bend, the transport of suspended sediment and the longitudinal and transverse deformation of the riverbed. The experimental data of the water tank verified the water flow model proposed in this paper and the results show that the calculated results of velocity distribution and water level are in good agreement with the measured data.Using the established mathematical model of water and sediment and the model of riverbank erosion, The main stream line position, section morphology, the ratio of the main groove changes, the simulation results in line with the evolution of the curve