GIS and AHP Based Groundwater Potential Zones Delineation in Chennai River Basin (CRB), India

Groundwater depletion is one of the most critical concerns for users and policymakers. Identifying groundwater potential (low to high) helps properly plan available resource. This study has used possibilities a geographical information system (GIS), remote sensing and, course, field data delineate zones in Chennai River Basin (CRB). Thematic layers generated eleven controlling factors, such as geology, water level, drainage, soil, lineament, rainfall, land use, slope, aspect, geomorphology, depth bedrock, were brought into GIS environment. Then, appropriate weightage was given each layer using multi-criteria decision-making technique, namely, analytic hierarchical process (AHP). A map weighted overlay analysis, with following five classes: very poor, moderate, good, good. The results comparable actual specific yield from accuracy 78.43%. Thus, AHP-aided GIS–RS mapping useful tool prospecting this region world.