Rock-Water Interactions and its Hydrogeochemical processes of Groundwater Resources: A Case Study for Mandya District of Karnataka State, India

Rock-Water interactions and hydrogeochemical processes are critical for understanding groundwater chemistry and the environmental impacts of various geological formations. These interactions involve several chemical processes that significantly influence the composition and groundwater quality. The present study aims to investigate the rock-water interactions and hydrogeochemical processes through the water samples collected from Mandya district. The study involved Piper’s diagram, Gibb’s diagram and Scatter plots of various parameters in revealing chemical processes that influence hydro geochemistry. The concentrations of these ions varied spatially and temporally in different taluks of Mandya district, depending on the lithological formations of those locations. Ions were dominated by Na>Ca>Mg>K = HCO₃>Cl>SO₄>CO₃. Ca-Mg-Cl, Ca-Na-HCO₃, and Ca-HCO₃ types were the dominant hydro chemical facies noticed in the study area. Hydrogeochemical processes provide valuable insights into the complex systems of rock-water interaction and to aid in effective groundwater management and pollution mitigations.