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The Analysis of Flood in an Ungauged Watershed using Remotely Sensed and Geospatial Datasets (II) - Focus on Estimation of Flood Inundation -

원격탐사와 공간정보를 활용한 미계측 유역 홍수범람 해석에 관한 연구(II) - 침수 피해면적 산정을 중심으로 -

Son, Ahlong;Kim, Jongpil
손아롱;김종필

  • Received : 2019.09.24
  • Accepted : 2019.10.08
  • Published : 2019.10.31

Abstract

This study evaluated the applicability of spacebourne datasets to the flood analysis in an ungauged watershed where is no discharge measurements. The Duman River basin of North Korea was selected as a target area which was flooded by recent Typhoon Lionrock. Topographical parameters for flood analysis were estimated from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global Digital Elevation Model (GDEM). GDEM includes the shortcomings of information on river cross-section, and conducted 2 dimensional flood analysis when considering virtual river cross-section and not considering it. As a result of comparative analysis, an error occurs in the inundation area and depth, but when used carefully, it is considered that the satellite image can be used for creating flood hazard map and utilizing information for response and preparation.

Keywords

Ungauged Basin;Satellite Image;GDEM;Flood Analysis;River Cross-Section

Acknowledgement

Grant : 위성자료 활용 현업지원 기술개발

Supported by : 국립재난안전연구원