Measurement of Groundwater Contaminant Concentration around a Landfill Flow through Heterogeneous Medium Using One-Dimensional Advection-Diffusion Equation

Leachate from poorly managed landfills poses a substantial threat to groundwater, which is a vital resource for irrigation and drinking. Uncontrolled waste disposal leads to seriously impaired water quality. Such landfills contribute leachate to contaminated groundwater, which negatively impacts the physical and qualitative characteristics of the increased groundwater pollutant concentration. Monitoring every facet of transport distribution is impractical. Therefore, a prediction of groundwater pollution concentration needs to be modeled to assist in following and examining the contaminated area. This study suggested groundwater pollutant concentrations are transported via the inhomogeneous medium and unsteady flow systems using the one-dimensional advection-diffusion equation. The numerical forward time-centered space finite difference method drives the transport of both solutes as they flow through the two systems. The resulting transport equations are produced and simulated, which have a close value with the analytical solution.