000			02288nam a22001217a 4500
082			_aGEOPGD455 _b2023 Ananda Krishnan
100			_aAnanda Krishnan _aDr. Dhanil Dev S G (Guide)
245			_aFlood Susceptibility Mapping and Assessment in a Sub-Basin of the Kali River: _bAn analytical hierarchy process-based multi-criteria decision-making approach for flood modelling _cAnanda Krishnan
260			_aKariavattom, Department of Geology _bUniversity of Kerala _c2023
520			_aFloods are a recurrent natural disaster in Uttara Kannada, primarily due to the region's notably high annual rainfall. This study aims to create flood susceptibility maps for selected subbasins of Kali River, Karwar taluk of Uttara Kannada district by combining remote sensing data, GIS and Analytical Hierarchy Process (AHP) methods. Karwar and Kadra areas were identified as one of the districts most vulnerable to flooding in Uttara Kannada. The objective of generating these maps is to enhance awareness about flood risks. Various factors have been chosen as inputs, including elevation, slope, distance from the river, rainfall, flow accumulation, stream density, soil types, water ratio index, land use/land cover, topographic wetness index and stream power index. The final flood susceptibility maps are categorized into five zones ranging from very low to very high. The prevalence of floods in the study area can be attributed to factors such as increased silting, human-induced reduction in stream width, alterations in land cover and land-use patterns, gentle slopes, elevated soil moisture levels, diminished stream capacity and inadequate soil infiltration capabilities. The accuracy of the prepared map was assessed using the receiver operating characteristic (ROC) curve technique. The area under the ROC curve (AUC) values of 0.829 obtained for the AHP method are deemed acceptable and very good. This confirms the predictive capability of the generated map. The highly susceptible zone encompasses approximately 14.87% of the entire study area. This map offers valuable insights for urban planners and policymakers, aiding them in devising strategies to mitigate the impact of future flood hazards and minimize damages.
650			_aDissertation _aGeology
942			_cBK
999			_c697861 _d697861