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Mathematical Modelling of Groundwater Quality Measurement around a Landfill for Residential Water Usage
Author(s)
Pongnu, Nattawut
Date Issued
January 1, 2022
Type
Article
Abstract
Leachate from a landfill has the potential to pollute groundwater. Mathematical models are often used to describe groundwater circulation, which can help planners choose suit-able places for a landfill. The construction of landfills may have an influence on the groundwater supplies of adjacent settle-ments. As a result, impact assessments must be completed prior to the start of the project. This study used three mathematical models to simulate groundwater contamination concentrations with variable flow velocities. The first model is a groundwater flow model that estimates the hydraulic head of groundwater flow. The second model is used to calculate the groundwater flow velocity. The third model is a dispersion model, in which the governing factor is the two-dimensional dispersion equation, which yields the groundwater pollution concentration. In the simulation phase, we use the finite difference method for all models. This investigation considers the effects of industrial water usage, such as pumping water up to the surface, on groundwater flow. This research focuses on the effects of pumping water to adjacent settlements on groundwater flow and the quality of the water produced. Construction of a landfill should always be done in an area with a low hydraulic head. Pumping wells near landfills may also assist to reduce pollution in household groundwater. As a result, the calculated water quality in the faraway area was improved while groundwater volume and flow velocity were preserved.
Citation
Engineering Letters, 30(3), 1006-1016, 2022