Category: Contaminant Transport Modeling
Posts
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POLLUTEv10 Example 6: Fractured Layer with Sorption and Reactive Transport
This example demonstrates the application of POLLUTEv10 for a more complex subsurface condition where fractured media and sorption processes both influence contaminant transport. It builds on previous cases by introducing a fractured till layer beneath a compacted clay liner and modeling a reactive contaminant species that sorbs to soil particles. Conceptual Model Overview The system…
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POLLUTEv10 Example 7: Lateral Migration of a Radioactive Contaminant in Fractured Rock
This example demonstrates how POLLUTEv10 can be used to simulate the lateral migration of a radioactive contaminant in a fractured porous rock system. It focuses on transport along a single set of parallel fractures, incorporating advection, dispersion, matrix diffusion, and radioactive decay. The scenario is particularly relevant for nuclear waste disposal assessments, deep geological repositories,…
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MIGRATEv10 Example 7: Improving Accuracy with User-Selected Fourier Integration
Introduction MIGRATEv10 Example 7 continues the refinement process from Examples 5 and 6 by addressing a persistent issue: 👉 Negative concentrations in the upper 5.6 m of the model domain In this case, the focus shifts from Talbot integration to Fourier integration, specifically how user-selected Gauss integration parameters can significantly improve model accuracy. This example…
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POLLUTEv10 Example 8: Laboratory Diffusion of Potassium in Clay
Laboratory diffusion testing is a cornerstone of contaminant transport analysis in low-permeability soils such as compacted clays. In POLLUTEv10 Example 8, the model is applied to simulate the diffusion of potassium (K⁺) through a clay specimen under controlled laboratory conditions. This example is based on well-established experimental work by R. Kerry Rowe and colleagues, including…
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POLLUTEv10 Example 9: Diffusion with Freundlich Non-Linear Sorption (Phenol in Clay)
In POLLUTEv10 Example 9, the model advances beyond linear sorption by incorporating Freundlich non-linear sorption to simulate the diffusion of phenol through a clay specimen. This example reflects more realistic contaminant behavior, particularly for organic compounds that do not follow simple linear partitioning. Problem Overview This example simulates a laboratory diffusion test with the following…
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MIGRATEv10 Example 8: Evaluating Contaminant Migration at Multiple Lateral Positions
Introduction MIGRATEv10 Example 8 introduces an important advancement in contaminant transport analysis: 👉 Evaluating concentration at multiple lateral positions Rather than focusing on a single point, this example investigates how a pollutant migrates outward from a buried landfill and how concentrations vary at different distances from the source. This approach provides a more realistic understanding…
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POLLUTEv10 Example 10: Time-Varying Advective–Dispersive Transport from a Landfill
Modeling Hydraulic Gradient Reversal with Variable Properties POLLUTEv10 Example 10 demonstrates one of the most powerful capabilities of the model: simulating time-varying transport conditions using the Variable Properties feature. This scenario captures a realistic landfill lifecycle where: Problem Overview This example models: Key Phases Conceptual Model The system includes: The most critical behavior is the…
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MIGRATEv10 Example 9: Comparison with the TDAST Analytical Solution
Introduction MIGRATEv10 Example 9 focuses on model validation by comparing numerical results from MIGRATEv10 with an established analytical solution. The benchmark used is TDAST, a program developed by Javandel et al. (1984) for solving 2-D plane dispersion in infinitely deep porous media. This example demonstrates how closely MIGRATE can reproduce analytical solutions and provides confidence…
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MIGRATEv10 Example 10: Contaminant Transport in Fractured Media with Sorption
Introduction MIGRATEv10 Example 10 introduces a more advanced and realistic scenario by incorporating: This example builds on earlier cases by modeling contaminant migration through a landfill barrier system that includes both compacted clay and a fractured till layer, while accounting for retardation due to sorption. It also serves as the 2-D extension of a similar…