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采用水深平均的河流流场数学模型的预处理方法，对天然河流中设置施工围堰和拆除围堰后的流场进行了数值模拟计算，取得的结果与实测资料吻合较好，表明此方法具有较好的稳定性及较快的收敛速度，对河流中设有围堰时流场的计算具有较高的经济及实用价值．
The mathematical model of river flow field pretreatment was adopted to simulate the flow field of cofferdam and cofferdam in natural river. The obtained results are in good agreement with the measured data, indicating that this method has the advantages of The better stability and faster convergence speed have higher economic and practical value for the calculation of flow field when cofferdam is installed in the river.