Proceedings of the Korea Water Resources Association Conference (한국수자원학회:학술대회논문집)

Korea Water Resources Association (한국수자원학회)
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Method Development of Flood Damaged Area Detection by Typhoon RUSA using Landsat Images

Landsat 영상을 이용한 태풍 RUSA 침수피해지역 분석기법 연구

  • 이미선 (건국대학교 대학원 지역건설환경공학과) ;
  • 박근애 (건국대학교 대학원 지역건설환경공학과) ;
  • 박민지 (건국대학교 대학원 지역건설환경공학과) ;
  • 신형진 (건국대학교 대학원 지역건설환경공학과) ;
  • 김성준 (건국대학교 생명환경과학대학 지역건설환경공학과)
  • Published : 2004.05.01
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Abstract

This study is to present a method of flood damaged area detection by the typhoon RUSA (August 31 - September 1, 2002) using Landsat 7 ETM+ and Landsat 5 TM images. Two images of Sept. 29, 2000 and Sept. 11, 2002 (path 115, row 34) were prepared for Gangreung, To identify the damaged areas, firstly, the NDVI (Normalized Difference Vegetation Index) of each image was computed, secondly, the NDVI values were reclassified as two categories that the negative index values including zero are the one and the positive index values are the other, thirdly the reclassified image before typhoon is subtracted from the reclassified image after typhoon to get DNDVI (Differential NDVI). Some part of urban and agricultural were classified into damaged area due to typhoon RUSA in Gangreung, $18.8km^2$ and $17.7km^2$ respectively.

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