Prioritization of watersheds based on a picture fuzzy analytic hierarchy process and linear assignment mode

Authors :Sarita Gajbhiye Meshram, Mehdi Sepheri, Chandrashekhar Meshram, Adel Moatamed, Brahim Benzougagh, Sara Parvizi, Ehsan Bazrafshan & Yegane Rahimi

Abstract:

Soil erosion is one of the most dangerous natural dangers, causing a great deal of harm in many parts of the world. In the presented study, the Gusru river watershed in Indi was divided into 14 sub-watersheds, and then 14 morphometric parameters were calculated, including drainage density (Dd), bifurcation ratio (Rb), streams frequency (Fs), average slope (Sa), form factor (Rf), circulatory ratio (RC), elongation ratio (Re), relative relief (Rh), ruggedness number (RN), bifurcation ratio (Rb), texture ratio (T), length of the overland flow (Lo) compactness coefficient (CC) and hypsometric integral (HI) were derived for each sub- watershed. Afterward, the combination of picture fuzzy-analytic hierarchy process and picture fuzzy-linear assignment model were used to assign weights to selected morphometric criteria and to rank the subwatersheds based on the level of soil erosion susceptibility. The results of the study showed that sub-watersheds 11 and 2 were the most susceptible sub watersheds, while sub-watersheds 13 and 14 had the lowest susceptibility to soil erosion. Prioritization and ranking of sub-watersheds from the perspective of soil erosion susceptibility can be used as a powerful tool for prevention and mitigation measures