The Integrated Spatial Assessment of The Flood Hazard Using AHP-GIS: The Case Study of Gorontalo Regency

Mapping of potential flood hazards is an important element in ensuring proper planning of development and implementing flood disaster mitigation efforts for flooded areas. Therefore, this study was conducted to assess the regional-scale flood hazard areas in Gorontalo District using an AHP-GIS integ...

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Bibliographic Details
Published in:The Indonesian journal of geography 2021-04, Vol.53 (1), p.126-135
Main Authors: Olii, Muhammad Ramdhan, Olii, Aleks, Pakaya, Ririn
Format: Article
Language:English
Subjects:
Annual rainfall
Disaster management
Disasters
Emergency preparedness
Flood control
Flood hazards
Flood mapping
Flood predictions
Flooded areas
Floods
Geographic information systems
Integration
Land use
Population density
Roads & highways
Soil types
Soils
Storm damage
Watersheds
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Summary:Mapping of potential flood hazards is an important element in ensuring proper planning of development and implementing flood disaster mitigation efforts for flooded areas. Therefore, this study was conducted to assess the regional-scale flood hazard areas in Gorontalo District using an AHP-GIS integration technique with the focus on factors such as annual rainfall, elevation, slope, soil type, distance to the water bodies, and land-use. The flood hazard was divided into five classes, ranging from very low to very high, and 13.61% of the total area in Gorontalo Regency is classified as either high or very high. Moreover, the distribution of the hazard was verified and 65 events were recorded to have a level of 90.7% and this indicates the model is reliable to assess flood hazard. The results showed GIS-AHP integration is a promising method to accurately predict flood-hazard areas, especially in those with limited data.
ISSN:0024-9521
2354-9114
DOI:10.22146/ijg.59999