Pre-monsoon hydrochemistry and multivariate analysis of deep groundwater, Sagar Island, Sundarbans
Deep Quaternary aquifers in Holocene mega-deltas are often assumed to be protected by low-permeability clay aquitards, yet they remain vulnerable to climate-driven and anthropogenic stress. This study investigated the confined aquifer system of Sagar Island, India, during the 2025 pre-monsoon peak-stress season to cl...