Geospatial Perspective for Groundwater Augmentation: A Case Study for Hunsur Taluk of India
DOI:
https://doi.org/10.58825/jog.2026.20.1.240Keywords:
AHP, Geospatial, Groundwater augmentation, HunsurAbstract
Groundwater augmentation is increasingly recognized as a critical strategy for addressing the global water crisis, particularly in regions experiencing groundwater depletion. This study aims to determine site suitability for Artificial Recharge Structures (ARS) in Hunsur taluk to support long-term groundwater sustainability. The integration of PAN (Panchromatic) and IRS-1D LISS (Linear Imaging and Self Scanning) satellite data improved the identification of suitable recharge locations using Geographic Information Systems (GIS) and the Analytic Hierarchy Process (AHP). Key groundwater recharge controlling parameters, including slope, lithology, geomorphology, land use/land cover (LULC), lineament density, soil, drainage density, and stream order were integrated to delineate potential recharge zone. The analysis identified suitable locations for 44 check dams, 16 nalah bunds, and 10 percolation tanks as site-specific remedial measures to enhance groundwater recharge, reduce surface runoff, and improve aquifer storage. These interventions are particularly recommended along moderate drainage networks, fractured zones, and gentle slope regions to maximize infiltration and recharge efficiency. The findings demonstrate the effectiveness of integrating GIS and AHP for scientifically guiding groundwater augmentation planning and implementing location-specific remedial measures for sustainable groundwater management in Hunsur taluk.
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