2D Simulation of Solute Movement Caused by Groundwater Extraction: A Case Study in Selangor, Malaysia

Groundwater is an important water source, but extraction can sometimes spread pollution, especially near contamination sources. This study uses a two-dimensional model to simulate pollutant transport in groundwater during pumping. The study focuses on an area in Selangor, Malaysia. The model is based on the Advection–Dispersion Equation and is solved using Green’s Function. It can be used for both confined and unconfined aquifers. At the beginning, the aquifer is assumed to be clean. The results are shown using MATLAB to display how pollution spreads over time and distance. Different factors are tested, such as pumping rate, the well location, pumping period of time, and the aquifer depth. The results show that using a double value of any of these factors can significantly increase the pollution near the well up to 2–8 times larger. This model helps to understand how pollution spreads and can guide decisions on safe pumping practices and well placement to protect groundwater quality.