{"id":92364,"date":"2026-04-22T16:43:12","date_gmt":"2026-04-22T16:43:12","guid":{"rendered":"https:\/\/gaeatech.com\/knowledge-center\/?p=92364"},"modified":"2026-04-24T01:46:01","modified_gmt":"2026-04-24T01:46:01","slug":"migrate-vs-pollute-fractured-layer-sorption","status":"publish","type":"post","link":"https:\/\/gaeatech.com\/knowledge-center\/migrate-vs-pollute-fractured-layer-sorption\/","title":{"rendered":"MIGRATEv10 vs POLLUTEv10: Fractured Layer with Sorption Comparison"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"h-overview\">Overview<\/h2>\n\n\n\n<p>This example compares results from MIGRATEv10 and POLLUTEv10 for a <strong>fractured soil layer with sorption<\/strong>.<\/p>\n\n\n\n<p>This is one of the more complex transport scenarios, combining:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Advection and dispersion<\/strong><\/li>\n\n\n\n<li><strong>Fracture flow (fast pathways)<\/strong><\/li>\n\n\n\n<li><strong>Matrix diffusion<\/strong><\/li>\n\n\n\n<li><strong>Sorption (retardation)<\/strong><\/li>\n<\/ul>\n\n\n\n<p>The result is a system where contaminants can move rapidly through fractures while simultaneously being <strong>retarded and stored in the soil matrix<\/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-model-setup\">Model Setup<\/h2>\n\n\n\n<p>Both models simulate a two-layer system:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-layers\">Layers<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Compacted clay (1 m)<\/strong><\/li>\n\n\n\n<li><strong>Fractured till (3 m)<\/strong><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-key-parameters\">Key parameters<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vertical velocity: 0.02 m\/a<\/li>\n\n\n\n<li>Dispersion:\n<ul class=\"wp-block-list\">\n<li>Matrix: 0.01 m\u00b2\/a<\/li>\n\n\n\n<li>Fractures: 0.06 m\u00b2\/a<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Porosity: 0.4<\/li>\n\n\n\n<li>Sorption:\n<ul class=\"wp-block-list\">\n<li>Matrix Kd \u2248 1.5<\/li>\n\n\n\n<li>Retardation factor \u2248 8.5 (MIGRATE)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Fractures:\n<ul class=\"wp-block-list\">\n<li>Very low porosity (2 \u00d7 10\u207b\u2075)<\/li>\n\n\n\n<li>Multiple fracture sets<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-boundary-conditions\">Boundary conditions<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Finite mass source (1000 mg\/L)<\/li>\n\n\n\n<li>Advective outflow at base (8 m\/a)<\/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-results-comparison\">Results Comparison<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"576\" height=\"455\" src=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/fractured-layer-breakthrough.jpg\" alt=\"\" class=\"wp-image-92365\" srcset=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/fractured-layer-breakthrough.jpg 576w, https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/fractured-layer-breakthrough-300x237.jpg 300w\" sizes=\"auto, (max-width: 576px) 100vw, 576px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-concentrations-at-600-years\">Concentrations at 600 Years<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-pollutev10-1d\">POLLUTEv10 (1D)<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Depth (m)<\/th><th>Concentration (mg\/L)<\/th><\/tr><tr><td>0<\/td><td>2.27 \u00d7 10\u207b\u00b3<\/td><\/tr><tr><td>1<\/td><td>0.377<\/td><\/tr><tr><td>4<\/td><td>26.7<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-migratev10-2d\">MIGRATEv10 (2D)<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Location<\/td><td>Depth = 4 m (mg\/L)<\/td><\/tr><tr><td>x = 0 m<\/td><td>15.2<\/td><\/tr><tr><td>x = 100 m<\/td><td>27.2<\/td><\/tr><\/tbody><\/table><\/figure>\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-observations\">Key Observations<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-strong-agreement-in-the-upper-layers\">1. Strong agreement in the upper layers<\/h3>\n\n\n\n<p>At shallow depths:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Concentrations at 0\u20131 m match very closely<\/li>\n\n\n\n<li>Example at 600 years:\n<ul class=\"wp-block-list\">\n<li>~0.002\u20130.003 mg\/L at surface<\/li>\n\n\n\n<li>~0.38 mg\/L at 1 m<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udc49 Both models accurately capture <strong>sorption-controlled retardation<\/strong><\/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-fracture-driven-transport-dominates-at-depth\">2. Fracture-driven transport dominates at depth<\/h3>\n\n\n\n<p>At 4 m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Concentrations are <strong>very high (~25\u201330 mg\/L)<\/strong><\/li>\n\n\n\n<li>Despite strong sorption in the matrix<\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udc49 Indicates that:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Fractures act as fast transport pathways<\/strong><\/li>\n\n\n\n<li>Matrix sorption cannot fully prevent breakthrough<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-centerline-vs-lateral-variability-migratev10\">3. Centerline vs lateral variability (MIGRATEv10)<\/h3>\n\n\n\n<p>At 600 years:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>x = 0 m \u2192 ~15 mg\/L<\/li>\n\n\n\n<li>x = 100 m \u2192 ~27 mg\/L<\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udc49 Large lateral variation due to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Finite source width<\/li>\n\n\n\n<li>2D plume spreading<\/li>\n\n\n\n<li>Fracture network geometry<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-pollute-vs-migrate-at-the-base\">4. POLLUTE vs MIGRATE at the base<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>POLLUTEv10:<\/strong> ~26.7 mg\/L<\/li>\n\n\n\n<li><strong>MIGRATEv10:<\/strong>\n<ul class=\"wp-block-list\">\n<li>Lower at center (~15 mg\/L)<\/li>\n\n\n\n<li>Higher near edges (~27\u201330 mg\/L)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udccc Interpretation:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>POLLUTE represents a <strong>1D average \/ centerline approximation<\/strong><\/li>\n\n\n\n<li>MIGRATE reveals <strong>spatial variability and plume structure<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-5-role-of-sorption\">5. Role of Sorption<\/h3>\n\n\n\n<p>Sorption significantly slows transport:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Surface concentrations are extremely low (~10\u207b\u00b3 mg\/L)<\/li>\n\n\n\n<li>Indicates strong retardation<\/li>\n<\/ul>\n\n\n\n<p>However:<\/p>\n\n\n\n<p>\ud83d\udc49 Sorption is <strong>less effective in fractures<\/strong>, where:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Flow velocities are higher<\/li>\n\n\n\n<li>Interaction with the matrix is limited<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-6-mass-transport-migrate-insight\">6. Mass Transport (MIGRATE insight)<\/h3>\n\n\n\n<p>At 600 years:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mass into soil \u2248 9.98 \u00d7 10\u2074<\/li>\n\n\n\n<li>Mass into base \u2248 2.62 \u00d7 10\u2074<\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udc49 A substantial fraction of contaminant mass:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Has migrated through the system<\/li>\n\n\n\n<li>Despite retardation effects<\/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-differences-summary\">Key Differences Summary<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Feature<\/td><td>MIGRATEv10<\/td><td>POLLUTEv10<\/td><\/tr><tr><td>Dimensionality<\/td><td>2D (x\u2013z)<\/td><td>1D (z only)<\/td><\/tr><tr><td>Fracture modeling<\/td><td>Explicit 2D behavior<\/td><td>Equivalent 1D representation<\/td><\/tr><tr><td>Sorption effects<\/td><td>Included<\/td><td>Included<\/td><\/tr><tr><td>Upper layer agreement<\/td><td>Excellent<\/td><td>Benchmark<\/td><\/tr><tr><td>Base concentration<\/td><td>Variable (15\u201330 mg\/L)<\/td><td>~27 mg\/L<\/td><\/tr><tr><td>Lateral variability<\/td><td>Captured<\/td><td>Not captured<\/td><\/tr><tr><td>Mass tracking<\/td><td>Yes<\/td><td>No<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-interpretation\">Interpretation<\/h2>\n\n\n\n<p>This case highlights a critical concept:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"has-small-font-size\"><strong>Fractures can bypass sorption-controlled matrix transport.<\/strong><\/p>\n<\/blockquote>\n\n\n\n<ul class=\"wp-block-list\">\n<li>POLLUTEv10 provides a <strong>useful average estimate<\/strong><\/li>\n\n\n\n<li>MIGRATEv10 shows:\n<ul class=\"wp-block-list\">\n<li>Preferential pathways<\/li>\n\n\n\n<li>Spatial variability<\/li>\n\n\n\n<li>Realistic plume behavior<\/li>\n<\/ul>\n<\/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-insight\">Key Insight<\/h2>\n\n\n\n<p>Even with strong sorption:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Contaminants can still reach the base at significant concentrations<\/li>\n\n\n\n<li>Fractures dominate long-term transport behavior<\/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-conclusion\">Conclusion<\/h2>\n\n\n\n<p>This comparison demonstrates that:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Both models correctly simulate <strong>fracture + sorption physics<\/strong><\/li>\n\n\n\n<li>Differences arise from how <strong>spatial variability is represented<\/strong><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-practical-guidance\">Practical guidance:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use <strong>POLLUTEv10<\/strong> for:\n<ul class=\"wp-block-list\">\n<li>Screening-level analysis<\/li>\n\n\n\n<li>Conservative average concentrations<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Use <strong>MIGRATEv10<\/strong> for:\n<ul class=\"wp-block-list\">\n<li>Fractured media analysis<\/li>\n\n\n\n<li>Plume geometry and variability<\/li>\n\n\n\n<li>Detailed risk assessment<\/li>\n<\/ul>\n<\/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-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<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\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\/migrate-vs-pollute-finite-mass\/\">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<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Overview This example compares results from MIGRATEv10 and POLLUTEv10 for a fractured soil layer with sorption. This is one of the more complex transport scenarios, combining: The result is a system where contaminants can move rapidly through fractures while simultaneously being retarded and stored in the soil matrix. Model Setup Both models simulate a two-layer [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":92366,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[858,1690],"tags":[501,24,1645,469,821,1689,1627,553],"class_list":["post-92364","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-contaminant-transport-modeling","category-migrateexamples","tag-contaminant-transport","tag-environmental-engineering","tag-fractured-media","tag-groundwater-modeling","tag-hydrogeology","tag-migratev10","tag-pollutev10","tag-sorption"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>MIGRATEv10 vs POLLUTEv10 Analysis of Fractured Layers - Knowledge Center<\/title>\n<meta name=\"description\" content=\"Compare MIGRATEv10 vs POLLUTEv10 for fractured layers with sorption. 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