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Application of unmanned aerial vehicle Dem in flood modeling and comparison with global dems: case study of atrak river basin, Iran
, Article Journal of Environmental Management ; Volume 317 , 2022 ; 03014797 (ISSN) ; Khojeh, S ; Hosseini, S. M ; Jouybari Moghadam, Y ; Sharif University of Technology
Academic Press
2022
Abstract
Digital Elevation Models (DEMs) play a significant role in hydraulic modeling and flood risk management. This study initially investigated the effect of Unmanned Aerial Vehicle (UAV) DEM resolutions, ranging from 1 m to 30 m, on flood characteristics, including the inundation area, mean flow depth, and mean flow velocity. Then, the errors of flood characteristics for global DEMs, comprising ALOS (30 m), ASTER (30 m), SRTM (30 m), and TDX (12 m) were quantified using UAV DEM measurements. For these purposes, the HEC-RAS 2D model in steady-state conditions was used to simulate the flood with return periods of 5- to 200 years along 20 km reach of Atrak River located in northeastern Iran....