標題: An Investigation of DEM Resolution Influence on Flood Inundation Simulation
作者: Hsu, Yung-Chia
Prinsen, Geert
Bouaziz, Laurene
Lin, Yi-Jun
Dahm, Ruben
交大名義發表
National Chiao Tung University
公開日期: 1-Jan-2016
摘要: This study investigates the influence of DEM resolutions on flood inundation simulation. Sanyei drainage area of Tainan City is taken as a case study. The catchment of Sanyei area is 43.7 km2 with a main stream of 6.7 km and elevations running from 2 m to 30 m. This study uses 1x1 m LiDAR DEM of Sanyei area as a basis. To do pure 2D flood simulation, the channel elevation is adjusted based on the cross-sectional measurements. The channel adjusted 1x1m DEM is later used as basis to aggregate several DEMs including: 5x5m, 10x10m, 20x20m, 40x40m. Five flood inundation models were built based on the 5 DEMs mentioned above with a same model setting. Results show that the inundation area evaluation increases with coarser DEMs. Specifically, the inundation area given by the 40x40m DEM is 1.5 times greater than that given by the 1x1m DEM. This may not only lead to different decision making in evacuation route and responses, but also the evaluation of economic loss and project planning, etc. (C) 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.
URI: http://dx.doi.org/10.1016/j.proeng.2016.07.435
http://hdl.handle.net/11536/136274
ISSN: 1877-7058
DOI: 10.1016/j.proeng.2016.07.435
期刊: 12TH INTERNATIONAL CONFERENCE ON HYDROINFORMATICS (HIC 2016) - SMART WATER FOR THE FUTURE
Volume: 154
起始頁: 826
結束頁: 834
Appears in Collections:Conferences Paper


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