NDLI: Flood Susceptibility Mapping through the GIS-AHP Technique Using the Cloud

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Flood Susceptibility Mapping through the GIS-AHP Technique Using the Cloud

Content Provider	MDPI
Author	Swain, Kishore Singha, Chiranjit Nayak, Laxmikanta
Copyright Year	2020
Description	Flood susceptibility mapping is essential for characterizing flood risk zones and for planning mitigation approaches. Using a multi-criteria decision support system, this study investigated a flood susceptible region in Bihar, India. It used a combination of the analytical hierarchy process (AHP) and geographic information system (GIS)/remote sensing (RS) with a cloud computing API on the Google Earth Engine (GEE) platform. Five main flood-causing criteria were broadly selected, namely hydrologic, morphometric, permeability, land cover dynamics, and anthropogenic interference, which further had 21 sub-criteria. The relative importance of each criterion prioritized as per their contribution toward flood susceptibility and weightage was given by an AHP pair-wise comparison matrix (PCM). The most and least prominent flood-causing criteria were hydrologic (0.497) and anthropogenic interference (0.037), respectively. An area of ~3000 sq km (40.36%) was concentrated in high to very high flood susceptibility zones that were in the vicinity of rivers, whereas an area of ~1000 sq km (12%) had very low flood susceptibility. The GIS-AHP technique provided useful insights for flood zone mapping when a higher number of parameters were used in GEE. The majorities of detected flood susceptible areas were flooded during the 2019 floods and were mostly located within 500 m of the rivers’ paths.
Starting Page	720
e-ISSN	22209964
DOI	10.3390/ijgi9120720
Journal	ISPRS International Journal of Geo-Information
Issue Number	12
Volume Number	9
Language	English
Publisher	MDPI
Publisher Date	2020-12-02
Access Restriction	Open
Subject Keyword	ISPRS International Journal of Geo-Information Isprs International Journal of Geo-information Remote Sensing Flood Susceptibility Geographic Information System (gis) Analytical Hierarchy Process (ahp) Google Earth Engine (gee) Multi-criteria Decision Support System
Content Type	Text
Resource Type	Article

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