Watershed prioritization based on soil and water hazard model using remote sensing, geographical information system and multi-criteria decision analysis approach

Abstract

This study includes the application of analytical hierarchy process (AHP) based multi-criteria decision analysis (MCDA) for prioritising vulnerable area of watershed for soil and water conservation measures based on impact analysis of different soil and water hazard conservation factors. To prioritise the vulnerable areas, the Bindra watershed which is part of Chhattisgarh State in India has been selected and divided into 16 sub-watersheds. Soil and water hazard rate index (SWHRI) was identified in GIS environment using soil loss (SL), sediment yield (SY), sediment transport index (STI), runoff potential (RP), and land capability class (LCC). Study found that, out of 16 sub-watersheds, 3 sub-watersheds (SW-11, SW-12, and SW-16), and 2 sub-watersheds (SW-1 and SW-4) falling under very high and very low priority zone respectively, therefore soil conservation measures in these areas should be implemented immediately through scientifically developed techniques.