Flood hazard delineation in Greater Dhaka, Bangladesh using an integrated GIS and remote sensing approach

Ashraf M. Dewan, Takashi Kumamoto, Makoto Nishigaki

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The objective of this paper is to delineate flood hazard areas for the greatest flood of 1998 in Greater Dhaka, the capital of Bangladesh. Multi-date RADARSAT Synthetic Aperture Radar (SAR) and Geographical Information System (GIS) data were used for this purpose. Flood frequency and floodwater depth were calculated using SAR data for the development of flood hazard maps. Flood hazard maps were created using a ranking matrix with land-cover, geomorphic units and elevation data as GIS components. The result of the study demonstrated that a major portion of Greater Dhaka constitutes high to very high hazard zones while only a little portion is not exposed to the potential flood hazard. It is expected that the proposed flood hazard maps will be useful to mitigate losses of lives and property from recurrent flood disasters in Greater Dhaka of Bangladesh.

Original languageEnglish
Pages (from-to)33-38
Number of pages6
JournalGeocarto International
Volume21
Issue number2
DOIs
Publication statusPublished - Dec 1 2006

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Water Science and Technology

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