Consequences of Various DEM Products on Coastal Inundation Modeling
Heri Andreas, Dina A. Sarsito, Hasanuddin Z. Abidin, Dhota Pradipta, Angga Trysa Yuherdha, Wedyanto Kuntjoro

Institute of Technology Bandung
Jalan Ganesha 10 Bandung Indonesia
heriandreas49[at]gmail.com

Abstract

Coastal inundation modeling is important in order to get potential hazards and disaster risks. To create a coastal inundation model, parameters are needed including the Digital Elevation System (DEM). The coastal lowlands are represented from the DEM. Technically from the corrected DEM by the land subsidence, sea level rise and tidal hydraulic models, we will get a coastal inundation model. The most important thing related to this work is the accuracy of the DEM beside the correct definition of height reference system. There are available DEM products with various accuracies. As for coastal inundation modeling, if we do not use an accurate DEM, in this case we will not get a good coastal inundation model. The further impact is that we will not get the correct map the hazards and disaster risks. This paper will demonstrate the consequences of various DEM products (e.g. DEMNAS, SRTM and LIDAR Measurement) on coastal inundation modeling with Jakarta as a case study area. Our finding shows that inaccurate DEM indeed led to incorrect hazard map and further derived misleading in define the potential hazard and disaster risk.

Keywords: Coastal inundation, modeling, Various DEM

Topic: Marine Hazard, and Coastal Protection