Groundwater Salinization and Freshening Processes in the Luy River Coastal Aquifer, Vietnam

The Vietnamese Binh Thuan province located along the Southern Central part of coast is one driest in country. population relying largely on groundwater for irrigation, and resources are threatened by climate change saltwater intrusion river estuaries. Recent studies, however, reveal that extension intrusions was larger than expected, raising some doubts actual origin intrusions. In this study, we use geochemical characterization samples collected both dry rainy seasons Luy coastal area to identify hydrochemical processes responsible salinization variations taking place shallow aquifers. distribution chemical components indicators presenting freshening processes, such as cation exchange code chloride conservative element, ionic delta, HFE-diagram, modelling, were studied. results show 65% exceed WHO limit drinking water 100% them have a degree restriction from slight–moderate severe potential irrigation problems according FAO. contrast previous expectations, dominant process aquifers, it more advanced season. Due lack recharge aquifer exploitation, deeper during Saltwater not limited zone close but extends further inland at depth, salinity can vary quickly over short distances. Based these new insights, develop conceptual model evolution catchment involving natural connate combined with anthropic influence. will form basis development study eventually lead sustainable management scenarios region, preventing deterioration resources.