Assessing seawater intrusion and chloride zones in residents' wells in selected coastal area of Indonesia: A GIS analysis

Background: Seawater intrusion refers to the infiltration of seawater into groundwater, either naturally or artificially, due extraction groundwater for domestic purposes. can have wide-ranging impacts on various aspects life, including health issues, reduced soil fertility, structural damage, and contamination. In Kendari District area, people rely springs, dug wells, drilled wells fulfill their daily water needs, as well tourist commercial activities. However, signs become evident when used by residents in area becomes brackish even saline. Objective: This study was determine distribution pattern chloride zones coastal District, specifically within City, Indonesia. Methods: employed a descriptive research design utilized purposive sampling select subjects. A total 20 samples were collected from City. The conducted at district. data then entered Geographic Information System (GIS) analyze Results: findings revealed an average pH 7.11 (ranging 5 8.8), temperature 29.4°C 29.4 32.7°C), Total Dissolved Solid (TDS) level 590.25 mg/L 54 1,388 mg/L), salinity 3.05‰ 1 5‰). Conclusion: Based these results, it be concluded that is classified low not affecting