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提出了黄河下游滩岸冲刷问题的严重性,评述了河床横向变形模拟技术和河床变形混合模型的研究现状,并指出现有模型不适用于黄河下游的河床变形计算。将平面二维水沙数学模型与粘性河岸冲刷模型结合,建立了河床变形的平面二维混合模型。采用多种改进措施后,该模型能同时模拟天然河道的纵向与横向变形,尤其适用于河床纵横向变化都十分剧烈的黄河下游。
The severity of the beach bank scour problem in the lower Yellow River is presented. The research status of the river bed deformation simulation technology and the riverbed deformation mixing model is reviewed. The existing model is not suitable for calculating the river bed deformation in the lower Yellow River. The plane two-dimensional flow and sediment mathematical model and sticky riverbank scour model are combined to establish a planar two-dimensional mixed model of riverbed deformation. After adopting a variety of improvement measures, the model can simulate the longitudinal and transverse deformation of natural channel at the same time, especially for the downstream of the Yellow River whose vertical and horizontal changes of the river bed are very intense.