Dynamic evolution model and simulation of flash flood based on heterogeneous parallel

被引：0
|
作者：
Wang F. [1 ,2 ]
Ouyang C. [1 ,2 ]
机构：
[1] Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu
[2] University of Chinese Academy of Sciences, Beijing
来源：
Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | 2023年 / 51卷 / 01期
关键词：
diffusion-wave model; flood forecast; heterogeneous parallel; numerical simulation; rain flood process;
D O I：
10.13245/j.hust.239410
中图分类号：
学科分类号：
摘要：
To establish the forward simulation and prediction method of rainfall-flood evolution in small watershed，a physical model of the whole process was constructed which from rainfall，vegetation interception，soil infiltration，slope confluence to flash flood evolution．The first-order upwind difference scheme was used to solve the diffusion wave equation describing the process from confluence to runoff，and a modified algorithm was used to ensure the calculation accuracy and simplicity at the convex terrain point．The heterogeneous parallel acceleration technology of CPU(central processing unit)+GPU(graphics processing unit) was used to realize the efficient simulation of the whole dynamic evolution process from rainfall to flash flood，and the computational efficiency was about 300 times higher than that of single-core CPU calculation．The validity of the current calculation model and method was verified by the analysis of one-dimensional terrain test，V-shaped flume experiment and flash flood process in the real small watershed of Longxi River in Dujiangyan，which can provide a potential scheme for the real-time prediction of flash flood disasters based on dynamic process. © 2023 Huazhong University of Science and Technology. All rights reserved.
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页码：16 / 25
页数：9
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