Mapping extent of flooded areas using remote sensing - A case study for Bui river in the historical flood in 2018

Abstract

  The paper presents the results of the inundation mapping from the Sentinel 1. Based on the principle ofcomparing two remote sensing images before and during the flood event, the study extracts flooded areain the historical flood in July 2018. The new approach to assess flood area was shown in ressearch withmany advantages: quickly, free of charge and independent of weather conditions. With detailedresolution, the results of the method are quite consistent with the actual situation in the study area.Chuong My and Quoc Oai districts have the largest flooding area with 12.94 and 11.1 km2,respectively.