| 摘要: |
| 针对SWMM在处理明渠溢流情况时存在的问题，提出一种新的明渠侧向溢流量计算方法。以改进后SWMM为基础的一维/二维耦合模型，可以将一维明渠与二维地表间的侧向流量交换过程纳入耦合范围，从而实现同时考虑垂向、侧向、正向流量交换的河网一体城市内涝水动力耦合模拟方法。利用改进后的SWMM与二维浅水方程求解模块组成耦合模拟平台，以HEC-RAS作为对比软件，通过实际内涝耦合模拟案例对耦合模型进行验证，结果表明耦合模拟平台计算结果与HEC-RAS计算结果吻合较好，水量平衡相对误差小于1% ，积水深度误差小于 0.1m，表明耦合模拟平台具有较好的精度和可靠性，在内涝风险评估及排水系统规划等场合具有较高的应用价值。 |
| 关键词: 耦合模拟 SWMM 明渠溢流 城市内涝 |
| DOI： |
| 分类号:TU992???? |
| 基金项目:国家自然科学基金(31670541) |
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| A coupling 1D-2D models simulation of open channel overflow based on improved SWMM |
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LIU Cheng-yu,JIN Xi,ZHANG Xiang-ling
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School of Civil Engineering Wuhan University of Technology
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| Abstract: |
| Aiming at the problem of SWMM in dealing with open channel overflow, a new calculation method of open channel lateral overflow is proposed. The one-dimensional / two-dimensional coupling model based on the improved SWMM can incorporate the lateral flow exchange process between one-dimensional open channel and two-dimensional surface into the coupling range, so as to realize the one-dimensional / two-dimensional coupling hydrodynamic coupling simulation method of urban waterlogging considering the vertical, lateral and forward flow exchange. The improved SWMM and the two-dimensional shallow water equation solving module are used to form a coupling simulation platform, and the HEC-RAS is used as the comparison software. The coupling model is verified by the actual waterlogging coupling simulation case. The results show that the calculation results of the coupling simulation platform are in good agreement with the HEC-RAS calculation results. The relative error of water balance is less than 1 %, and the error of water depth is less than 0.1m. It shows that the coupling simulation platform has good accuracy and reliability, and has high application value in waterlogging risk assessment and drainage system planning. |
| Key words: coupling simulation SWMM open-channel overflow urban waterlogging |
