TITLE:
Flood Risk Map Based on GIS, and Multi Criteria Techniques (Case Study Terengganu Malaysia)
AUTHORS:
Ranya Fadlalla Abdalla Elsheikh, Sarra Ouerghi, Abdel Rahim Elhag
KEYWORDS:
Geographic Information System, Multi Criteria Decision Making, Analytical Hierarchy Process, Pairwise Comparison, Flood
JOURNAL NAME:
Journal of Geographic Information System,
Vol.7 No.4,
August
6,
2015
ABSTRACT: The heavy floods in the
Terengganu have showed an increasing trend in recent years. Terraincharacteristics of land and
meteorological properties of the region are main natural factors forthisdisaster.
In this paper, Terengganu was selected as the case study for flood risk
analysis. Geographical Information System (GIS) is integrated with
Multicriteria Decision Analysis (MCDA) to evaluate the potential flood risk
areas. Some of the causative factors for flooding in watershed are taken into
account as annual rainfall, basin slope, drainage network and the type of soil.
The spatial multi-criteria analysis was used to rank and display potential
locations, while the analytical hierarchy process method was used to compute
the priority weights of each criterion. Using AHP, the percentages derived from
the factors were Rainfall 38.7%, Drainage network 27.5%, Slope of the river
basin 19.8% and Soil type 14%. At the end of the study, a map of flood risk
areas wasgenerated and validated
with a view to assisting decision makers on the menace posed by the disaster.