Flood hazard delineation in Greater Dhaka, Bangladesh using an integrated GIS and remote sensing approach
Access Status
Authors
Date
2006Type
Metadata
Show full item recordCitation
Source Title
ISSN
School
Collection
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 potentialflood 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.
Related items
Showing items related by title, author, creator and subject.
-
Dewan, Ashraf; Islam, M.; Kumamoto, T.; Nishigaki, M. (2007)Floods are a common feature in rapidly urbanizing Dhaka and its adjoining areas. Though Greater Dhaka experiences flood almost in every year, flood management policies are mostly based on structural options including flood ...
-
Masuya, Akiko; Dewan, Ashraf; Corner, Robert (2015)The objective of this study was to evaluate the spatial distribution of flood shelters in relation to flood hazards in a resource-poor country. Flood hazard estimates were developed from multi-temporal flood-affected ...
-
Masuya, A.; Dewan, Ashraf; Corner, R. (2015)The objective of this study was to evaluate the spatial distribution of flood shelters in relation to flood hazards in a resource-poor country. Flood hazard estimates were developed from multi-temporal flood-affected ...