GIS-based multi-criteria analysis for flood hazard areas mapping of M'zab wadi basin (Ghardaia, North-Central Algeria)

Located in the hyper-arid regions of Algeria, the M'zab Wadi basin has historically experienced severe flash flooding, causing severe economic damage and loss of life. Identifying potential flood hazard areas in such an arid environment, challenged by data scarcity, is necessary to forecast flo...

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Bibliographic Details
Published in:	Arid land research and management Vol. 38; no. 1; pp. 1 - 25
Main Authors:	Hamlat, Abdelkader, Meharzi, Salim, Guidoum, Azeddine, Sekkoum, Mohamed, Mokhtari, Youcef, Kadri, Chadli Bendjedid
Format:	Journal Article
Language:	English
Published:	Philadelphia Taylor & Francis 02-01-2024 Taylor & Francis Ltd
Subjects:	Analytic hierarchy process Analytical hierarchy process arid environment Arid environments Arid regions Arid zones Decision making Flash flooding Flash floods Flood damage Flood forecasting flood hazard Flood hazards Flood management Flood mapping Floods floodwater harvesting Geographic information systems Geographical information systems Information systems M'zab Wadi Multiple criterion Remote sensing Vulnerability Algeria
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Summary:	Located in the hyper-arid regions of Algeria, the M'zab Wadi basin has historically experienced severe flash flooding, causing severe economic damage and loss of life. Identifying potential flood hazard areas in such an arid environment, challenged by data scarcity, is necessary to forecast flood and to create early warning strategies. The paper aims to map and highlight potential flood hazard areas in the M'zab Wadi basin using geographic information system coupled with the Analytical Hierarchy Process method based on seven related flood hazard factors. The accuracy of the flood hazard map was validated using the Receiver Operating Characteristic based Area Under Curves method. The results show that 3.04% (50.35 km 2 ) and 0.53% (8.74 km 2 ) of the basin area are under high and very high flood vulnerability levels, respectively. The obtained results can offer significant insights to policymakers and decision-makers to make well-informed judgments regarding the effectiveness of flood protective infrastructure/measures. Furthermore, the approach adopted can be advantageous for other regions under similar conditions.
ISSN:	1532-4982 1532-4990
DOI:	10.1080/15324982.2023.2235315