水力发电学报2018，Vol.37Issue(2)：96-107,12.DOI:10.11660/slfdxb.20180210
高效高精度水动力模型在洪水演进中的应用研究
Application of efficient high-resolution hydrodynamic model to simulations of flood propagation
摘要
Abstract
To improve the accuracy,numerical stability and computational efficiency of the existing 2D numerical models of flood propagation and inundation,this paper presents a full hydrodynamic model based on the GPU acceleration techniques (GAST).The model is applied to reproduce a flood event with a return period of 100 years that occurred in Morpeth town,UK.Two grid resolutions of 5 m and 2 m are used in the model and the MIKE21 FM model to investigate different inundation patterns.It is found that the GAST model can achieve an error range of only 0.96％-4.36％ in its calculations of the inundated area and its run-time is 2.17 h and 9.00 h for the 5m and 2m resolutions respectively.It improves computational accuracy and efficiency by 1.07-19.55 times and 3.40-11.78 times respectively relative to the MIKE21 FM.And this superiority becomes more prominent as the number of grids increases.Thus the GAST model is an ideal tool for modelling flood propagation and inundation.关键词
水动力学模型/数值模拟/GPU加速计算/洪水演进/计算效率Key words
hydrodynamic model/numerical simulation/GPU accelerated computing/flood propagation/computational efficiency分类
建筑与水利引用本文复制引用
侯精明,李桂伊,李国栋,LIANGQiuhua,支再兴..高效高精度水动力模型在洪水演进中的应用研究[J].水力发电学报,2018,37(2):96-107,12.基金项目
国家重点研发计划(2016YFC0402704) （2016YFC0402704）
国家自然科学基金(19672016 （）
51579206) （）
