FLOOD HAZARD MAPPING OF LOWER DAMANGANGA RIVER BASIN USING MULTI- CRITERIA ANALYSIS AND GEOINFORMATICS APPROACH

C. KAPADIA, K. PATEL, J. AKBARI, N. RATHOD, D. MEHTA, S. WAIKHOM

Abstract


One of the most damaging natural disasters that occurs anywhere in the world is flooding. Flood hazard mapping is essential to determining the flood risk zone areas. In the present study, the analytical hierarchical process (AHP) and geographical information system (GIS) were used for flood hazard mapping of the lower Damanganga River basin from the Madhuban Dam to the Arabian Sea. The major factors affecting floods are hydrological characteristics, which are the combination of meteorological and basin characteristics. A total of seven parameters were selected, and

a thematic map for each parameter was prepared. AHP was used to find the weights of the selected parameters using a questionnaire survey. Thematic maps were then integrated with weighted parameters obtained to create the flood hazard map. The abovementioned study's findings show that approximately 32% of the total area in the lower Damanganga River basin is prone to high floods, whereas 33% of the total area is prone to moderate floods. This study will be helpful to policy makers for reducing the risk of flooding.


Keywords


Damanganga basin, AHP, Flood hazard mapping, GIS, Resources at LISS-III.

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