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
相关论文
共 38 条
  • [1] KIRCHMEIER-YANG M C，, WAN H, ZHANG X, Importance of framing for extreme event attribution：the role of spatial and temporal scales[J], Earth's Future1, 7, 10, pp. 1192-1204, (2019)
  • [2] WEI K, OUYANG C J，, DUAN H, Reflections on the catastrophic 2020 Yangtze River basin flooding in southern China[J], Innovation, 1, (2020)
  • [3] FEKETE A，, SANDHOLZ S．, Here comes the flood，but not failure? Lessons to learn after the heavy rain and pluvial floods in germany 2021[J], Water, 13, 21, pp. 3016-3115, (2021)
  • [4] 53, 1, pp. 29-38, (2021)
  • [5] (2014)
  • [6] BOSSELER B, SALOMON M, SCHLUTER M, Living with urban flooding： a continuous learning process for local municipalities and lessons learnt from the 2021 events in Germany[J], Water, 13, 19, (2021)
  • [7] MONTESARCHIO V，, RIDOLFI E, RUSSO F, Rainfall threshold definition using an entropy decision approach and radar data[J], Natural Hazards and Earth System Sciences, 11, 7, pp. 2061-2074, (2011)
  • [8] LIN K, ZHOU J, LIANG R, Identifying rainfall threshold of flash flood using entropy decision approach and hydrological model method[J], Natural Hazards, 108, pp. 1-22, (2021)
  • [9] ERNEST B C, MANUEL G V，DOLZ, Integration of 1D and 2D finite volume schemes for computations of water flow in natural channels[J], Advances in Water Resources, 142, pp. 17-29, (2012)
  • [10] LIN B L，, FALCONER R, LIANG D F．, Linking one- and two-dimensional models for free surface flows[J], Proceedings of the Institution of Civil Engineers-Water Management, 160, 3, pp. 145-151, (2007)
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