Example 1: U.S. RCRA Subtitle D Landfill
Composite liner, primary leachate collection and aquifer impact in a foundational landfill assessment.
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20 Documented Models
Learn POLLUTEv10 through Progressive, Reviewable Examples
Move from fundamental diffusion models to engineered landfill systems, fractured media and uncertainty analysis.
Each example explains the conceptual model, assumptions, inputs and result interpretation. Filter the library by application or search for a transport process.
20 ExamplesFoundation through advanced
5 Landfill ModelsLiners and collection systems
6 Advanced CasesReactive and changing systems
4 Review CasesBenchmarks and uncertainty
Example Library
Find a Model by Application or Process
Start with the simplest example that contains the process you need, then progress to more complex configurations.
Showing 20 examples
Example 2: Pure Diffusion in Soil
A conservative contaminant moving through a soil layer without sorption or advective flow.
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Example 3: Advection, Diffusion and Aquifer Mixing
Adds groundwater flow and a permeable aquifer boundary to the diffusion model.
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Example 4: Finite Mass Source with Leachate Collection
Represents a depleting source and active leachate collection in an engineered landfill.
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Example 5: Hydraulic Trap with Upward Flow
Examines contaminant containment where groundwater flow opposes downward migration.
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Example 6: Fractured Layer with Sorption
Combines transport in fractured till with reactive sorption below an engineered liner.
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Example 7: Radioactive Contaminant in Fractured Rock
Models lateral fracture transport, matrix diffusion and radioactive decay.
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Example 8: Laboratory Potassium Diffusion in Clay
Reproduces a controlled diffusion test through saturated clay with an impermeable base.
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Example 9: Phenol Diffusion with Freundlich Sorption
Demonstrates concentration-dependent nonlinear sorption during diffusion through clay.
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Example 10: Time-Varying Advective–Dispersive Transport
Uses variable properties to represent changing landfill flow and transport conditions.
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Example 11: Time-Varying Chloride Source in Clay
Models a changing source history under diffusion-only conditions in clay.
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Example 12: Fractured Media Analytical Benchmark
Compares fracture–matrix transport with the Tang et al. analytical solution.
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Example 13: 2D Plane Dispersion Benchmark
Compares the documented plane-dispersion formulation with the TDAST analytical solution.
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Example 14: Primary and Secondary Collection with Passive Sink
Uses a passive sink to represent contaminant removal by a secondary collection layer.
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Example 15: Leachate Collection System Failure
Combines variable properties and a passive sink to represent time-dependent system failure.
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Example 16: Monte Carlo Analysis of Failure Timing
Evaluates uncertainty in collection-system failure time using probabilistic simulation.
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Example 17: Composite Liners and Dual Collection Systems
Represents a modern multi-barrier landfill with primary and secondary collection.
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Example 18: Phase Change in a Secondary Collection System
Examines phase partitioning, unsaturated and saturated zones and biological decay.
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Example 19: Multiphase Toluene Diffusion through a Geomembrane
Reproduces laboratory-scale VOC transport through geomembrane, air and water zones.
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Example 20: Sensitivity Analysis of Collection-System Failure
Tests how assumed primary collection-system service life affects predicted impacts.
Open documented exampleInstructional examples are not design standards. Adapt the conceptual model and parameters to site-specific conditions and have the resulting engineering interpretation reviewed by a qualified professional.
Suggested Learning Path
Build Understanding in Four Stages
1
Transport Foundations
Begin with Examples 2, 3 and 5 to isolate diffusion, advection, aquifer mixing and hydraulic direction.
2
Sources and Sorption
Use Examples 4, 8 and 9 to examine finite mass, laboratory diffusion and nonlinear sorption.
3
Engineered Systems
Progress through Examples 1, 14, 15 and 17 for liners, sinks and collection-system performance.
4
Advanced Review
Use Examples 12, 13, 16 and 20 for benchmarks, probabilistic analysis and sensitivity.
Selecting a Starting Point
Match the Example to the Engineering Question
- Identify whether transport is diffusion-dominated, advective or mixed
- Determine whether the source is constant, finite or time-varying
- Choose the required liner, collection and aquifer boundaries
- Identify sorption, decay, fractured-media or phase-change processes
- Decide whether a deterministic, sensitivity or probabilistic analysis is needed
- Confirm that POLLUTE’s 1D/1.5D formulation fits the spatial problem
Recommended Use of an Example
- Reproduce the documented case.
- Check that its results and trends are understood.
- Save an unchanged reference copy.
- Replace inputs with project-supported values.
- Test one change at a time.
- Document differences and limitations.
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