1.青海黄河上游水电开发有限责任公司;2.中国电建集团西北勘测设计研究院有限公司;3.河海大学计算机与软件学院
TV11；P407
青海黄河上游水电开发有限责任公司揭榜挂帅项目(KY-C-2023-SD02),国家重点研发计划资助项目(2021YFB3900605)
1.Qinghai Huanghe hydropower development Co,LTD;2.China;3.Powerchina Northwest Engineering Co,LTD,Xi’an;4.College of Computer Science and Software Engineering,Hohai University,Nanjing,;5.College of Computer Science and Software Engineering,Hohai University,Nanjing
针对基于DEM的洪水淹没算法中存在的模拟结果准确性差、淹没源点选取困难导致的效率低下等问题，提出一种适用于中小河流的横向淹没算法。以河道为考虑对象，在已知洪水水位前提下，根据河道汇流的交叉点将河道划分为若干河段，然后提取河段折点并在同一河段两个相邻折点间的等分点上向河道两侧进行横向垂直探测，获取河道两侧淹没范围，从而得到洪水淹没区域。选择横江流域30m、90m和1km分辨率的DEM数据进行模拟分析，结果表明该方法能有效提升洪水淹没分析的能力，可实现中小河流泛洪淹没过程模拟，为中小河流山洪灾害防御和风险评估提供快速、准确的决策依据和技术支撑。
In response to the issues such as poor accuracy and low efficiency of simulation results in the flood inundation algorithm based on DEM, a lateral inundation algorithm applicable to small and medium-sized rivers is proposed. The algorithm takes the river as the object and divides it into segments according to the intersection points of river confluences. Then, the inflection points of the river sections are extracted and lateral vertical detections are carried out at the equal division points between two adjacent inflection points in the same river section towards both sides of the river channel to obtain the inundation range of the river channel, thereby obtaining the flood inundation area. DEM data with resolutions of 30m, 90m and 1km in the Hengjiang River Basin were selected for simulation analysis. The results indicate that this method can effectively improve the ability of flood inundation analysis and realize the simulation of the flood inundation process in small and medium-sized rivers, providing rapid and accurate decision-making basis and technical support for the prevention of mountain torrent disasters and risk assessment in small and medium-sized rivers.
