河海大学学报（自然科学版）2025，Vol.53Issue(4)：80-88,9.DOI:10.3876/j.issn.1000-1980.2025.04.010
基于高精度DEM的溃坝漫堤耦合模型及淹没区敏感性分析
Coupled model of dam breaches and levee overtopping and sensitivity analysis of inundation areas based on high-precision DEM
摘要
Abstract
To more accurately simulate the inundation process of inundation areas downstream of small-sized reservoirs after dam breaches and reveal the coupling mechanisms of dam breaches and levee overtopping,the DaYJ Reservoir in Guizhou Province was studied.Digital elevation measurements and orthophoto imaging were conducted in the reservoir area and downstream flood-prone areas.A coupled model of dam breaches and levee overtopping was developed based on a high-precision DEM,and sensitivity analyses were performed within the study area regarding flood depth,flow velocity,and flood severity relative to levee height.The results indicate that compared with the single dam breach model,the coupled model of dam breach and levee overtopping can more realistically simulate the changes in the inundation range downstream over time.When the levee height is no more than 1 m,overtopping is highly probable.A transitional state between levee overtopping and non-overtopping occurs at a levee height of approximately 1.5 m.When the levee height exceeds 1.7m,overtopping is entirely prevented,and the flood primarily bypasses the levee from its end,inundating residential areas.As levee height increases,the arrival time of the flood,the emergence time of a 0.3 m water depth,and the occurrence time of the peak flow velocity are all delayed.Furthermore,both the maximum flow velocity and the peak flood severity within the study area of levee overtopping generally decrease and become more uniformly distributed.关键词
高精度DEM/溃坝/洪水演进/漫堤/洪水敏感性分析Key words
high-precision DEM/dam breach/flood evolution/levee overtopping/flood sensitivity analysis分类
建筑与水利引用本文复制引用
余再康,程井,王俊珍,孔垂穗,晏卫国..基于高精度DEM的溃坝漫堤耦合模型及淹没区敏感性分析[J].河海大学学报（自然科学版）,2025,53(4):80-88,9.基金项目
国家重点研发计划项目(2022YFC3005501) （2022YFC3005501）
水利部重大科技项目(SKS-2022153) （SKS-2022153）
贵州省水利科技经费项目(KT202217,KT202218) （KT202217,KT202218）
