Flash flood hazard mapping based on AHP with GIS and satellite information in Kampong Speu Province, Cambodia
International Journal of Disaster Resilience in the Built Environment
ISSN: 1759-5908
Article publication date: 16 November 2020
Issue publication date: 18 November 2021
Abstract
Purpose
Cambodia is considered one of the countries that are most vulnerable to adverse effects of climate change, particularly floods and droughts. Kampong Speu Province is a frequent site of calamitous flash floods. Reliable sources of flash flood information and analysis are critical in efforts to minimize the impact of flooding. Unfortunately, Cambodia does not yet have a comprehensive program for flash flood hazard mapping, with many places such as Kampong Speu Province having no such information resources available. The purpose of this paper is, therefore, to determine flash flood hazard levels across all of Kampong Speu Province using analytical hierarchy process (AHP) and geographical information system (GIS) with satellite information.
Design/methodology/approach
The integrated AHP–GIS analysis in this study encompasses ten parameters in the assessment of flash flood hazard levels across the province: rainfall, geology, soil, elevation, slope, stream order, flow direction, distance from drainage, drainage density and land use. The study uses a 10 × 10 pairwise matrix in AHP to compare the relative importance of each parameter and find each parameter’s weight. Finally, a flash flood hazard map is developed displaying all areas of Kampong Speu Province classified into five levels, with Level 5 being the most hazardous.
Findings
This study reveals that high and very high flash flood hazard levels are identified in the northwest part of Kampong Speu Province, particularly in Aoral, Phnum Srouch and Thpong districts and along Prek Thnot River and streams.
Originality/value
The flash flood hazard map developed here provides a wealth of information that can be invaluable for implementing effective disaster mitigation, improving disaster preparedness and optimizing land use.
Keywords
Citation
Koem, C. and Tantanee, S. (2021), "Flash flood hazard mapping based on AHP with GIS and satellite information in Kampong Speu Province, Cambodia", International Journal of Disaster Resilience in the Built Environment, Vol. 12 No. 5, pp. 457-470. https://doi.org/10.1108/IJDRBE-09-2020-0099
Publisher
:Emerald Publishing Limited
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