An Investigation of DEM Resolution Influence on Flood Inundation Simulation

Yung-Chia Hsu, Geert Prinsen, Laurene Bouaziz, Yi-Jung Hsu, Ruben Dahm

研究成果: Conference contribution同行評審

10 引文 斯高帕斯(Scopus)

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.
原文English
主出版物標題12TH INTERNATIONAL CONFERENCE ON HYDROINFORMATICS (HIC 2016) - SMART WATER FOR THE FUTURE
頁面826-834
頁數9
DOIs
出版狀態Published - 2016

指紋 深入研究「An Investigation of DEM Resolution Influence on Flood Inundation Simulation」主題。共同形成了獨特的指紋。

引用此