Integration of Rs, Gis and Ahp Technique for Assessing Ground Water Potential Zones in and Around Valliyur Region, Tirunelveli District, Tamilnadu, India

Abstract

There are numerous hydrogeological characteristics that define the groundwater potential zones of groundwater aquifers. Through the use of remote sensing, GIS, and AHP methods, the study's main goals are to highlight the prospective conditions of various areas and choose appropriate locations for possible groundwater zones. There are 55 villages in the research area, which is located in and around the Valliyur area of the Tirunelveli district in Tamil Nadu, India. The research elucidates seven essential topic levels, which are as follows: Maps of the lithology, geomorphology, drainage density, lineament density, slope, soil, and land use and landcover are included. For the preparation of each theme layer, data was gathered from several sources. The AHP method was then used to assign Weightage and Ranks for each thematic layer based on how significant they were in terms of groundwater potential. Finally, the weighted overlay method is used to identify zones with five different groundwater potential levels, such as Very Low, Low, Medium, High, and Very High zones. The findings showed that the results from the AHP technique were significantly more accurate.