IJEP 44(8): 687-694 : Vol. 44 Issue. 8 (August 2024)
1. SRM Institute of Science and Technology, Department of Civil Engineering, Faculty of Engineering and Technology, Kattankulathur – 603 203, Tamil Nadu, India
2. Sri Sivasubramaniya Nadar College of Engineering (SSN), Department of Civil Engineering, Kalavakkam – 603 110, Tamil Nadu, India
Abstract
The demand and need for the vital water resources for various human activities is constantly increasing and surface water supplies are rapidly declining and becoming inadequate. Significant issues, such as depletion of water tables, scarcity of water, low water quality and groundwater drought are caused by excessive groundwater extraction. Chengalpattu district in Tamil Nadu is one of the places that has been impacted by hydrological droughts which has affected the availability of freshwater resources. Groundwater capacity is one of the critical factors responsible for the occurrence of hydrological drought. This research study aims to classify the groundwater potential zones in the selected study area using geoinformatics and analytical hierarchy process (AHP). Landsat 8 OLI/TIRS and SRTM DEM were used for the preparation of various thematic maps. The AHP technique was adopted to prioritize influential features for delineating the groundwater potential zones. Weighted overlay analysis was performed by assigning weights to each influential parameter. Five classes of groundwater potential were seen at the study area: very poor (0.40%), poor (2.55%), medium (55.24%), good (33.94%) and very good (7.87%). The study reveals that about 55.24% of district falls under medium groundwater potential zone.
Keywords
Geoinformatics, Thematic maps, Analytical hierarchy process, Weighted overlay, Groundwater potential zone
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