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尾闾河段是否畅通 ,直接关系到河流能否安全泄洪、排沥 ,是水利部门十分关注的问题 .本文阐述了采用一、二维耦合数学模型进行尾闾河段洪水与潮波的模拟的基本理论 ,对耦合模型的交界面条件及耦合方式进行了详细说明 ,并以某河尾闾段为例建立一、二维耦合模型 .一维数学模型研究计算的范围为河口区上游的河段 ,平面二维数学模型研究计算的范围为近挡潮闸河段以及至河口外近海区域 .模型以历史洪水和实测潮波分别进行了验证 ,计算结果与观测结果吻合良好 ,表明耦合模型可以较好地反映模拟河段及近海区的洪水与潮汐特性 ,解决河流尾闾段的水力模拟计算 .
Whether the tail river section is smooth or not is directly related to whether the river can discharge safely and drain the river, which is a concern of the water conservancy department.This paper describes the simulation of the flood and the tide wave in the tail channel by using one-dimensional and two-dimensional coupled mathematical models Basic theory, the interface conditions and coupling modes of coupling model are described in detail, and a one-dimensional and two-dimensional coupling model is established by taking a river tail section as an example.The range of the study calculated by one-dimensional mathematical model is the river section , The plane two-dimensional mathematical model of the study calculated range of the tidal reach of the dam and offshore estuary estuary area.The model was verified by historical flood and measured tidal wave, the calculated results are in good agreement with the observed results, indicating that the coupled model can be more The flood and tidal characteristics in the simulated reach and offshore are well reflected to solve the hydraulic simulation of the tailrace section of the river.