Groundwater Potential Zone demarcating using GIS Technique: A Case Study in Harur Taluk, Dharmapuri District, Tamilnadu

Abstract

Abstract Groundwater availability and supplies around the world are under tremendous pressure as a result of climatic changes by recent decade over. The requirement to assess the groundwater potential in this case area for productivity of aquifers grows as the need for drinking water for human use, agriculture, and industrial applications rises worldwide. Since it provides quick information on the water supply for future developments and management at the village level, geographic information systems have been increasingly important in groundwater exploration in recent years. In sequence to define the groundwater potential target at the village level in the harur Taluka of the Dharmapuri District, Tamil Nadu, the present study has been chosen. In the current study, a geographic information system and analytical tools were used. For the purpose of defining the groundwater potential zone, a total of seven theme layers such as geology, geomorphology, lineament density, drainage density, rainfall, soil, and slope were produced and researched. All of the themed maps' weights are based on each class's attributes and water potential capacity. Cross-validating the output's accuracy with local groundwater prospects yielded a technique accuracy score of about 90%. This led to the classification of the groundwater potential zone are classed as high, moderate, low, and extremely low. The analysis shows that a moderate groundwater potential zone covers about 59% of the Harur Taluka. Zones with low and high groundwater potential are found in 11% and 29% of the total areas, respectively. Only a very small number of locations fall under very high to very low potential zones reported.