Adinda Dwi Handayani, Dewi Liesnoor Setyowati, Sriyono
The problem of seawater intrusion poses a unique challenge for communities living on the coast of Tegal City. This study aims to (1) analyze groundwater utilization in Kraton and Tegalsari Subdistricts, (2) analyze groundwater quality and seawater intrusion zones in Kraton and Tegalsari Subdistricts, and (3) spatially analyze the impact of seawater intrusion zones on groundwater utilization in Kraton and Tegalsari Subdistricts. The study population consists of community wells in Kraton and Tegalsari Subdistricts, Tegal City. This study employs spatial analysis, field measurement parameter scoring analysis, descriptive analysis, and comparative analysis. The results indicate that 92% of the area in the Kraton and Tegalsari Subdistricts falls under the light intrusion zone. Based on groundwater quality parameters, the TDS value in Kraton and Tegalsari Subdistricts is 2,818.05 ppm, the salinity value is 2.1625 ppt, and the temperature and pH are still within the standards set by Ministry of Health Regulation No. 32 of 2017, with a pH range of 6.5-8.5 and a temperature of ±30°C. The primary factors contributing to high intrusion levels include distance from the coastline or ponds, as well as groundwater exploitation. Groundwater utilization varies significantly across each intrusion zone. Groundwater is still widely used in non-intruded zones for domestic purposes such as bathing, washing clothes, washing kitchen utensils, washing vehicles, watering plants, washing floors, and washing rice. In heavily intruded zones, groundwater is almost no longer utilized. © Published under licence by IOP Publishing Ltd.
Department Geography, Universitas Negeri Semarang, Semarang City, Indonesia
