主题词：Groundwater and Isotope Geochemistry; Groundwater and Watershed Analysis; Groundwater flow and contamination studies; Water Quality and Pollution Assessment; Hydrology and Watershed Management Studies; Flood Risk Assessment and Management; Arsenic contamination and mitigation; Water resources management and optimization; Adsorption and biosorption for pollutant removal; Heavy metals in environment; Fluoride Effects and Removal; Geophysical and Geoelectrical Methods; Geochemistry and Geologic Mapping; Hydrological Forecasting Using AI; Geophysics and Gravity Measurements; Water-Energy-Food Nexus Studies; Heavy Metal Exposure and Toxicity; Radioactivity and Radon Measurements; Mine drainage and remediation techniques; Environmental remediation with nanomaterials; Karst Systems and Hydrogeology; Geophysical Methods and Applications; Membrane Separation Technologies; Child Nutrition and Water Access; Nanomaterials for catalytic reactions