水利水电技术2017，Vol.48Issue(12)：1-6,6.DOI:10.13928/j.cnki.wrahe.2017.12.001
基于高精度DEM的城市道路积水淹没计算方法研究
High precision DEM-based study on method for calculation of urban road waterlogging and submergence
摘要
Abstract
Aiming at the calculation of the waterlogging caused by rainstorm in the micro-scale scene of the urban road in Zhengzhou,the waterlogging submerged range is calculated with the seed spread algorithm according to the mode of source flood submergence on the basis of establishing the high precision grid DEM with the technique of vehicle LiDAR,and then the quick approaching solving between the submerged level and the amount of overflow is realized with the dichotomy method by obtaining the amount of overflow at the point of waterlogging during rainstorm through constructing the rainstorm-flood model of Zhengzhou.By taking a waterlogging road section in Zhengzhou as the application case,it is known from the comparison made between the results of the analysis and calculation and the data of water depth measured by electronic watergauge that the Nash-Sutcliff determination coefficient is 0.94,RMSE is 0.05 and the relative error is 10.3％,which indicates that the calculated result of the submergence has higher precision and the simulated submergence process of the waterlogging area is coincided with that of the actual situation.The method is suitable for the calculations of both the submerged range and water depth of rainstorm waterlogging in the urban street area concerned.关键词
城市内涝/淹没分析/车载LiDAR/雨洪模型/DEM/城市防洪/海绵城市建设Key words
urban waterlogging/submergence analysis/vehicle LiDAR/rainstorm-flood model/DEM/urban flood control/Sponge City construction分类
建筑与水利引用本文复制引用
张成才,黄河,朱祖乐,王金鑫..基于高精度DEM的城市道路积水淹没计算方法研究[J].水利水电技术,2017,48(12):1-6,6.基金项目
河南省基础与前沿技术研究项目(152300410044) （152300410044）
河南省高等学校重点科研项目(16A420005) （16A420005）
河南省农业气象保障与应用技术重点实验室开放基金(AMF201407) （AMF201407）
