Application of unmanned airborne lidar technology in flood process simulation
YANG Dong1, HOU Jingming1, ZHANG Zhaoan1, WANG Xinghua1, LI Changhao1, BAI Ganggang1, CHEN Wenjun2, FU Deyu3
1. State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048; 2. Office of Shaanxi Provincial Flood Control and Drought Relief Headquarters, Xi'an 710004; 3. Beijing Capital CO. LTD, Beijing 100028
Abstract:High-resolution DEM data is one of the key factors to improve the simulation accuracy of flood process. On the basis of flood process simulation,the DEM data of the sample urban areas and watersheds are obtained by unmanned airborne lidar technology and orthophoto technology. According to the topographic data,a hydrodynamic model is used to simulate the flood process in the study area. The results are verified and compared with the measured data. The results show that unmanned airborne lidar technology is a new way to acquire high-resolution DEM,which has the advantages of high measurement accuracy. It can easily generate high-precision topographic data and produce more reliable calculated results in flood simulation.
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