Model Hidrogeologi Konseptual Untuk Estimasi Kapasitas Akuifer Pantai Gowa-Takalar, Sulawesi Selatan

[Title: Hydrogeological Conceptual Model to Estimate Infiltration Capacity of Coastal Aquifer at Gowa-Takalar, South Sulawesi]. The Gowa-Takalar area is a coastal plain mainly composed of materials of alluvial and coastal deposits. The materials form an unconfined aquifer that has been intensively exploited since the 1990s. Groundwater chemistry data of the last two years indicates the effect of seawater intrusion into aquifers. The annual cycle of the rainy and dry seasons with the properties of the unconfined aquifer may become an essential condition to maintain the sustainability of groundwater resources in the region. Numerical modeling was performed using Visual MODFLOW Flex to evaluate aquifer capacity based on recharge capacity due to the season changes. The simulation results showed that the recharge into the Gowa-Takalar coastal aquifer system was dominated by the recharge from a river in July – September, while October – June by infiltration of rainwater.