Share
Export Citation
Numerical modelling to predict groundwater flow velocity and direction in Makassar City Indonesia
Badaruddin S.
Aip Conference Proceedings
Abstract
This research investigates the velocity and direction of shallow groundwater flow across Makassar City, Indonesia, employing the three-dimensional numerical model MODFLOW. The study’s significance lies in its comprehensive analysis of groundwater dynamics, essential for effective water resource management in urban areas. Utilizing a detailed model that incorporates the region’s varied soil composition—comprising alluvial sediment, sandy clay, tuff, and volcanic breccia—the study provides precise insights into groundwater behaviour. The results indicate that the depth of shallow groundwater in Makassar ranges from 1 to 9 meters above sea level, with flow velocities spanning from 0.00025 m/day in Panakkukang District to 0.001 m/day in Biringkanayya and Tamalanrea Districts. Groundwater flow directions also exhibit significant variation; in the southern region, it predominantly flows eastward, while in the eastern part, it moves westward, eventually draining into the sea to the city’s west. This research offers novel insights into the spatial variability of groundwater flow in an urban setting, highlighting the critical need for targeted groundwater management strategies. Previous studies indicate that Panakkukang and Manggala Districts possess the highest groundwater potential among all districts in Makassar City due to their large transmissivity values. This is likely attributed to the favourable position of these areas within the groundwater discharge zone. Future work should focus on integrating these findings with urban planning efforts to mitigate potential water-related issues and ensure sustainable groundwater utilization.