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针对目前分蓄洪区内河渠边界模拟精度不高的问题,提出采用斜对角笛卡尔方法来处理分蓄洪区内沿网格斜对角方向布置的河渠边界问题,扩展了笛卡尔坐标系下平面二维水流数学模型功能,同时又改善了笛卡尔坐标方法锯齿边界拟合精度差的缺点.通过概化模型的计算,证明了该模型在理论上和方法上都是可行的,较好地解决了以往分蓄洪区河渠边界沿网格线布置精度不高的问题,使河渠边界流场更加合理.该方法可用于模拟分蓄洪区内含堤防和河渠对洪水演进的影响,为防洪调度提供参考.
Aiming at the problem that the simulation accuracy of the river channel boundaries in the flood diversion area is not high at present, the diagonal Cartesian method is proposed to deal with the river channel boundary problem along the diagonal direction of the grid in the flood diversion area. The second Dimensional water flow mathematical model, and at the same time, it improves the shortcoming of poor fitting precision of the jagged boundary of the Cartesian coordinate method.By generalizing the model calculation, it is proved that the model is feasible in both theory and method, In the past, the problem of low precision of layout along the gridlines in the flood diversion area led to a more reasonable flow field at the boundary of the river channel, which can be used to simulate the influence of embankments and canals in the flood diversion area on flood evolution and provide reference for flood control regulation.