A GIS-based flood risk mapping of Assam, India, using the MCDA-AHP approach at the regional and administrative level. Issue 26 (13th December 2022)

• Record Type: Journal Article
• Authors: Gupta, Laxmi; Dixit, Jagabandhu
• Is Part Of: Geocarto international. Volume 37:Issue 26(2023)
• Page Start: 11867
• Page End: 11899
• Publication Date: 2022-12-13
• Subjects: Flood hazard -- vulnerability -- risk -- GIS -- analytical hierarchy process (AHP) -- multicriteria decision analysis (MCDA) -- Assam; Remote sensing -- Periodicals; Geographic information systems -- Periodicals; Geology -- Periodicals; Cartography -- Periodicals; 621.3678
• DOI: 10.1080/10106049.2022.2060329
• Languages: English
• ISSNs: 1010-6049

Abstract

Abstract: Floods are frequently occurring events in the Assam region due to the presence of the Brahmaputra River and the heavy monsoon period. An efficient and reliable methodology is utilized to prepare a GIS-based flood risk map for the Assam region, India. At the regional and administrative level, the flood hazard index (FHI), flood vulnerability index (FVI), and flood risk index (FRI) are developed using multi-criteria decision analysis (MCDA) – analytical hierarchy process (AHP). The selected indicators define the topographical, geological, meteorological, drainage characteristics, land use land cover, and demographical features of Assam. The results show that more than 70%, 57.37%, and 50% of the total area lie in moderate to very high FHI, FVI, and FRI classes, respectively. The proposed methodology can be applied to identify high flood risk zones and to carry out effective flood risk management and mitigation strategies in vulnerable areas.