An investigation of Digital Elevation Model (DEM) structure influence on flood modelling

International Conference on Environmental Resources Management in Global Region 2017

地球科学;生态环境科学

Sahid^1 ; Nurrohman, A.W.^2 ; Hadi, M.P.^3

Graduated School, Geo-Information for Spatial Planning and Disaster Risk Management, Environmental Science, Universitas Gadjah Mada, Indonesia^1

Master Program on Planning and Management of Coastal Area and Watershed, Faculty of Geography, Universitas Gadjah Mada, Indonesia^2

Centre of Environmental Studies, Universitas Gadjah Mada, Indonesia^3

关键词: Digital elevation model;    Fine resolution;    Flood inundation modeling;    Flood modelling;    Flood peak discharge;    Peak discharge;    Return periods;    Spatial resolution;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/148/1/012001/pdf
DOI  :  10.1088/1755-1315/148/1/012001

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Flood is one of the natural calamities that cause huge losses and damages. Flood hazard zonation has been widely produced to face the impact of the disaster. DEM as the primary data to construct the earth surface has been developed from rough to fine resolution. Aster GDEM v.2 within 1arc spatial resolution has an ability to derived DEM and TIN data as bases river geometrics data. Maximum daily peak discharges used to calculate flood peak discharge. Furthermore, steady flow analysis has been used to produce flood inundation model based on four scenarios with return periods 5yr, 10yr, 50yr, and 100yr. The model results have been validated using UAV flood map in 2016 by means of pixel by pixel operation and the result shows that the vertical variance between grid DEM and TIN data about 0.3 m.