{"id":92270,"date":"2026-04-22T14:00:33","date_gmt":"2026-04-22T14:00:33","guid":{"rendered":"https:\/\/gaeatech.com\/knowledge-center\/?p=92270"},"modified":"2026-04-24T01:19:12","modified_gmt":"2026-04-24T01:19:12","slug":"migratev10-example-1-rcra-landfill-composite-liner","status":"publish","type":"post","link":"https:\/\/gaeatech.com\/knowledge-center\/migratev10-example-1-rcra-landfill-composite-liner\/","title":{"rendered":"MIGRATEv10 Example 1: Modeling a RCRA Subtitle D Landfill with a Composite Liner"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"h-introduction\">Introduction<\/h2>\n\n\n\n<p>MIGRATEv10 Example 1 demonstrates how to model contaminant migration from a <strong>U.S. RCRA Subtitle D landfill<\/strong> using a <strong>composite liner system<\/strong> and a <strong>primary leachate collection system (PLCS)<\/strong>. This example is foundational for understanding how engineered barriers control leakage and how contaminants move into underlying groundwater systems.<\/p>\n\n\n\n<p>The simulation focuses on a <strong>volatile organic compound (VOC)<\/strong> with a constant source concentration and evaluates how leakage through defects in the geomembrane contributes to groundwater contamination.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conceptual-model-overview\">Conceptual Model Overview<\/h2>\n\n\n\n<p>The modeled landfill system includes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A <strong>composite liner system<\/strong>:\n<ul class=\"wp-block-list\">\n<li>60 mil (1.5 mm) <strong>HDPE geomembrane<\/strong><\/li>\n\n\n\n<li>0.9 m thick <strong>compacted clay liner<\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>A <strong>primary leachate collection system<\/strong><\/li>\n\n\n\n<li>An underlying <strong>aquifer with horizontal groundwater flow<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-key-modeling-objective\">Key Modeling Objective<\/h2>\n\n\n\n<p>The purpose of this example is to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Estimate <strong>leakage through geomembrane defects<\/strong><\/li>\n\n\n\n<li>Simulate <strong>contaminant transport into the aquifer<\/strong><\/li>\n\n\n\n<li>Demonstrate how MIGRATEv10 applies established analytical methods for liner performance<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-composite-liner-system-details\">Composite Liner System Details<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-geomembrane-properties\">1. Geomembrane Properties<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><th>Property<\/th><th>Value<\/th><\/tr><tr><td>Thickness<\/td><td>60 mil (1.5 mm)<\/td><\/tr><tr><td>Condition<\/td><td>Good contact with clay liner<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-defect-assumptions\">Defect Assumptions<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hole area:<\/strong> 0.1 cm\u00b2<\/li>\n\n\n\n<li><strong>Frequency:<\/strong> 1 hole per acre (2.5 per hectare)<\/li>\n<\/ul>\n\n\n\n<p>These defects represent realistic imperfections that control leakage rates.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-compacted-clay-liner\">2. Compacted Clay Liner<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Property<\/td><td>Value<\/td><\/tr><tr><td>Thickness<\/td><td>0.9 m<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>The clay liner acts as a <strong>secondary barrier<\/strong>, reducing flow that passes through geomembrane defects.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-leakage-calculation-method\">Leakage Calculation Method<\/h2>\n\n\n\n<p>Leakage through the composite liner is calculated automatically in MIGRATEv10 using:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Giroud et al. (1992)<\/li>\n\n\n\n<li>Giroud and Bonaparte (1989)<\/li>\n<\/ul>\n\n\n\n<p>These methods account for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hole size and frequency<\/li>\n\n\n\n<li>Hydraulic head<\/li>\n\n\n\n<li>Interface contact conditions<\/li>\n<\/ul>\n\n\n\n<p>This provides a <strong>realistic estimate of leakage rates<\/strong> without requiring manual calculations.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-landfill-geometry-and-source-conditions\">Landfill Geometry and Source Conditions<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Parameter<\/td><td>Value<\/td><\/tr><tr><td>Landfill Length<\/td><td>200 m<\/td><\/tr><tr><td>Landfill Width<\/td><td>200 m<\/td><\/tr><tr><td>Leachate Head<\/td><td>0.3 m<\/td><\/tr><tr><td>Source Concentration<\/td><td>1500 \u03bcg\/L (constant)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>The constant concentration assumption simplifies the model while representing a sustained contaminant source.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-aquifer-properties\">Aquifer Properties<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Parameter<\/td><td>Value<\/td><\/tr><tr><td>Flow Direction<\/td><td>Parallel to landfill length<\/td><\/tr><tr><td>Darcy Velocity<\/td><td>10 m\/year<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>The aquifer flow controls the <strong>down-gradient transport<\/strong> of contaminants once they enter groundwater.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-modeling-approach-in-migratev10\">Modeling Approach in MIGRATEv10<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-1-define-landfill-geometry\">Step 1: Define Landfill Geometry<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Input landfill dimensions (200 m \u00d7 200 m)<\/li>\n\n\n\n<li>Specify liner system configuration<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-2-configure-composite-liner\">Step 2: Configure Composite Liner<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Enter geomembrane thickness and defect characteristics<\/li>\n\n\n\n<li>Define clay liner thickness and properties<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-3-apply-leakage-model\">Step 3: Apply Leakage Model<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use built-in <strong>Giroud method<\/strong> (automatic in MIGRATE-GUI)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-4-define-source-term\">Step 4: Define Source Term<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Set constant concentration: <strong>1500 \u03bcg\/L<\/strong><\/li>\n\n\n\n<li>Apply constant leachate head: <strong>0.3 m<\/strong><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-5-configure-aquifer-flow\">Step 5: Configure Aquifer Flow<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Set horizontal Darcy velocity: <strong>10 m\/year<\/strong><\/li>\n\n\n\n<li>Define down-gradient boundary conditions<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-6-run-simulation\">Step 6: Run Simulation<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Evaluate contaminant migration into the aquifer<\/li>\n\n\n\n<li>Analyze plume development over time<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-graphical-output-depth-vs-concentration\">Graphical Output: Depth vs Concentration<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1005\" height=\"881\" src=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/image-32.jpg\" alt=\"\" class=\"wp-image-92271\" srcset=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/image-32.jpg 1005w, https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/image-32-300x263.jpg 300w, https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/image-32-768x673.jpg 768w\" sizes=\"auto, (max-width: 1005px) 100vw, 1005px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-pdf-report\">PDF Report<\/h2>\n\n\n<div class=\"ead-preview\"><div class=\"ead-document\" style=\"position: relative;padding-top: 90%\"><div class=\"ead-iframe-wrapper\"><iframe src=\"\/\/docs.google.com\/viewer?url=https%3A%2F%2Fgaeatech.com%2Fknowledge-center%2Fwp-content%2Fuploads%2F2026%2F04%2Fmigrate-example1-1.pdf&amp;embedded=true&amp;hl=en\" title=\"Embedded Document\" class=\"ead-iframe\" style=\"width: 100%;height: 100%;border: none;position: absolute;left: 0;top: 0;visibility: hidden;\"><\/iframe><\/div>\t\t\t<div class=\"ead-document-loading\" style=\"width:100%;height:100%;position:absolute;left:0;top:0;z-index:10\">\n\t\t\t\t<div class=\"ead-loading-wrap\">\n\t\t\t\t\t<div class=\"ead-loading-main\">\n\t\t\t\t\t\t<div class=\"ead-loading\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/plugins\/embed-any-document\/images\/loading.svg\" width=\"55\" height=\"55\" alt=\"Loader\">\n\t\t\t\t\t\t\t<span>Loading&#8230;<\/span>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div class=\"ead-loading-foot\">\n\t\t\t\t\t\t<div class=\"ead-loading-foot-title\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/plugins\/embed-any-document\/images\/EAD-logo.svg\" alt=\"EAD Logo\" width=\"36\" height=\"23\"\/>\n\t\t\t\t\t\t\t<span>Taking too long?<\/span>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<p>\n\t\t\t\t\t\t\t<div class=\"ead-document-btn ead-reload-btn\" role=\"button\">\n\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/plugins\/embed-any-document\/images\/reload.svg\" alt=\"Reload\" width=\"12\" height=\"12\"\/> Reload document\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<span>|<\/span>\n\t\t\t\t\t\t\t<a href=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/migrate-example1-1.pdf\" class=\"ead-document-btn\" target=\"_blank\">\n\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/plugins\/embed-any-document\/images\/open.svg\" alt=\"Open\" width=\"12\" height=\"12\"\/> Open in new tab\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-interpretation-of-results\">Interpretation of Results<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-leakage-through-defects\">1. Leakage Through Defects<\/h3>\n\n\n\n<p>Even small geomembrane holes can result in measurable leakage, especially under sustained hydraulic head.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-role-of-composite-liner\">2. Role of Composite Liner<\/h3>\n\n\n\n<p>The combination of geomembrane + clay liner significantly reduces contaminant flux compared to single-layer systems.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-groundwater-transport\">3. Groundwater Transport<\/h3>\n\n\n\n<p>Once contaminants enter the aquifer:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>They migrate in the direction of groundwater flow<\/li>\n\n\n\n<li>Plume shape and extent depend on Darcy velocity<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-long-term-behavior\">4. Long-Term Behavior<\/h3>\n\n\n\n<p>With a constant source, contaminant concentrations may:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Increase over time<\/li>\n\n\n\n<li>Reach steady-state conditions depending on system parameters<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-key-takeaways\">Key Takeaways<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Composite liners are highly effective but <strong>not impermeable<\/strong><\/li>\n\n\n\n<li>Small defects can control overall leakage rates<\/li>\n\n\n\n<li>MIGRATEv10 simplifies complex calculations using established methods<\/li>\n\n\n\n<li>Aquifer flow conditions are critical for predicting plume migration<\/li>\n\n\n\n<li>This example provides a strong foundation for <strong>landfill impact assessments<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-final-thoughts\">Final Thoughts<\/h2>\n\n\n\n<p>MIGRATEv10 Example 1 is an essential starting point for modeling landfill systems under <strong>RCRA Subtitle D regulations<\/strong>. It demonstrates how engineering design, material properties, and hydrogeologic conditions interact to control contaminant migration.<\/p>\n\n\n\n<p>For real-world applications, additional considerations may include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Variable source concentrations<\/li>\n\n\n\n<li>Degradation of liner materials<\/li>\n\n\n\n<li>Heterogeneous subsurface conditions<\/li>\n<\/ul>\n\n\n\n<p>As always, modeling results should be interpreted with <strong>engineering judgment and site-specific data<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-learn-more-about-our-contaminant-transport-modeling-solutions\">Learn more about our Contaminant Transport Modeling Solutions<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.gaeatech.com\/pollute.php\" target=\"_blank\" rel=\"noreferrer noopener\">POLLUTE and MIGRATE Contaminant Modeling and Landfill Design<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-migrate-examples\"> MIGRATE Examples<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/migratev10-example-2-double-liner-leachate-system\/\">MIGRATEv10 Example 2: Composite Liner System with Primary &amp; Secondary Leachate Collection<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/migratev10-example-3-pure-diffusion-conservative-contaminant\/\">MIGRATEv10 Example 3: Pure Diffusion of a Conservative Contaminant<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/migratev10-example-4-finite-mass-aquifer-mixing\/\">MIGRATEv10 Example 4: Finite Mass Source and Aquifer Mixing with Base Outflow<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/migratev10-example-5-integration-accuracy-modeling\/\">MIGRATEv10 Example 5: Understanding Integration, Accuracy, and the Role of Engineering Judgment<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/migratev10-example-6-integration-parameters-negative-concentration\/\">MIGRATEv10 Example 6: Eliminating Negative Concentrations Through Improved Integration<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/migratev10-example-7-fourier-integration-accuracy\/\">MIGRATEv10 Example 7: Improving Accuracy with User-Selected Fourier Integration<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/migratev10-example-8-lateral-contaminant-transport\/\">MIGRATEv10 Example 8: Evaluating Contaminant Migration at Multiple Lateral Positions<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/migratev10-example-9-tdast-comparison\/\">MIGRATEv10 Example 9: Comparison with the TDAST Analytical Solution<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/migratev10-example-10-fractured-media-sorption\/\">MIGRATEv10 Example 10: Contaminant Transport in Fractured Media with Sorption<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/migratev10-example-11-multiple-landfills-contaminant-transport\/\">MIGRATEv10 Example 11: Contaminant Migration from Two Adjacent Landfill Cells<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/migratev10-example-12-time-dependent-source-landfills\/\">MIGRATEv10 Example 12: Modeling Time-Dependent Source Histories for Multiple Landfill Cells<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/migratev10-example-13-leachate-collection-termination\/\">MIGRATEv10 Example 13: Termination of Primary Leachate Collection System<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-comparison-between-pollute-and-migrate\">Comparison between POLLUTE and  MIGRATE<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/migrate-vs-pollute-pure-diffusion\/\">MIGRATEv10 vs POLLUTEv10: Pure Diffusion Comparison<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/migrate-vs-pollute-advective-diffusive-transport\/\">MIGRATEv10 vs POLLUTEv10: Advective\u2013Diffusive Transport Comparison<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/wp-admin\/post.php?post=91707&amp;action=edit\">MIGRATEv10 vs POLLUTEv10: Finite Mass Source Comparison<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/migrate-vs-pollute-hydraulic-trap\/\">MIGRATEv10 vs POLLUTEv10: Hydraulic Trap (Finite Mass Source) Comparison<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/migrate-vs-pollute-fractured-layer-sorption\/\">MIGRATEv10 vs POLLUTEv10: Fractured Layer with Sorption Comparison<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Introduction MIGRATEv10 Example 1 demonstrates how to model contaminant migration from a U.S. RCRA Subtitle D landfill using a composite liner system and a primary leachate collection system (PLCS). This example is foundational for understanding how engineered barriers control leakage and how contaminants move into underlying groundwater systems. The simulation focuses on a volatile organic [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":92274,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[858,1690],"tags":[1626,501,24,1681,469,1689,1688],"class_list":["post-92270","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-contaminant-transport-modeling","category-migrateexamples","tag-composite-liner","tag-contaminant-transport","tag-environmental-engineering","tag-geomembrane-leakage","tag-groundwater-modeling","tag-migratev10","tag-rcra-landfill"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>MIGRATEv10 Example 1 Composite Liner Model Insights - Knowledge Center<\/title>\n<meta name=\"description\" content=\"Learn 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