| 基于GPU加速技术的非结构流域雨洪数值模型 |
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| 引用本文： | 侯精明,张兆安,马利平,张大伟,向立云,汪煜,李继成.基于GPU加速技术的非结构流域雨洪数值模型[J].水科学进展,2021,32(4):567-576. |
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| 作者姓名： | 侯精明 张兆安 马利平 张大伟 向立云 汪煜 李继成 |
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| 作者单位： | 1.西安理工大学省部共建西北旱区生态水利国家重点实验室, 陕西 西安 710048 |
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| 基金项目： | 国家自然科学基金资助项目52009104国家自然科学基金资助项目52079106 |
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| 摘 要： | 为高效高精度地模拟流域雨洪过程，应用动力波法求解二维圣维南方程，并耦合水文过程，建立了包含流域降雨产流、汇流、下渗以及洪水演进等过程的高性能流域雨洪数值模型。该模型的优势在于使用非结构网格，可较好地处理不规则边界，准确贴合复杂地形表面，使得模型能精确计算模拟流域雨洪过程，同时引入GPU技术加速计算，使得大尺度流域雨洪计算成为可能。最后，将模型应用于V型经典算例及2个实际流域雨洪算例，所得结果与实测吻合较好，计算所用时间较短，表明该模型可以快速且精确模拟流域雨洪过程。研究结果有助于实现对实际流域雨洪灾害进行合理高效的预测，为应急抢险工作提供有力支撑。
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| 关 键 词： | 雨洪过程 非结构网格 GPU加速计算 动力波法 数值模拟 |
| 收稿时间： | 2020-11-16 |
Unstructured numerical model for rainfall-runoff process in watershed based on GPU acceleration technology |
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| Institution: | 1.State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China2.State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China3.China Institute of Water Resources and Hydropower Research, Beijing 100038, China4.China Power Construction Group, Co. LTD, Northwest Engineering Corporation Limited, Xi'an 710065, China |
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| Abstract: | In order to simulate the rainfall-runoff process of the basin with high efficiency and high accuracy, the dynamic wave method is applied to solve the two-dimensional Saint-Venant equation, with the hydrological process coupled. A high-performance watershed rainfall-runoff process numerical model including processes such as rainfall runoff, confluence, infiltration, and flood evolution has been established. The advantage of this model is the use of unstructured grids, which can better deal with irregular boundaries and accurately fit the surface of complex terrain, so that the model can accurately calculate and simulate the rainfall-runoff process of the basin; besides, the GPU technology is introduced to accelerate calculations in this model, making it possible to calculate storm floods in large-scale watersheds. Finally, the model was applied to the V-type classic case and two actual watershed flood cases; the obtained results are in good agreement with the actual measurement, and the calculation time is shorter, showing that the model can quickly and accurately simulate the river basin rainfall-runoff process. The research results are helpful for realizing reasonable and efficient prediction of flood disasters in actual river basins, so as to provide strong support for emergency rescue work. |
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