Quantitative hydrogeological and geomorphological analyses for groundwater potential assessment in hard rock terrains
Hydrogeological and geomorphological parameters have been quantitatively correlated with groundwater availability. Weathered rock thickness has the highest control on availability of groundwater followed by lineament density whereas drainage density is seen to have minimum influence. A poor correlation is noticed between borewell depth and yield. The amplitude of seasonal variations in groundwater levels is noted to be higher in the low lying plains compared to the hilly regions. The groundwater potential zonation map, prepared using data merging techniques and assigning weightages based on the quantitative analyses of parameters on a GIS platform shows that more than 45% of borewells falling in the area under the category of excellent water availability are high-yielding.