{"id":92292,"date":"2026-04-21T08:00:42","date_gmt":"2026-04-21T08:00:42","guid":{"rendered":"https:\/\/gaeatech.com\/knowledge-center\/?p=92292"},"modified":"2026-04-16T02:08:49","modified_gmt":"2026-04-16T02:08:49","slug":"migratev10-example-4-finite-mass-aquifer-mixing","status":"publish","type":"post","link":"https:\/\/gaeatech.com\/knowledge-center\/migratev10-example-4-finite-mass-aquifer-mixing\/","title":{"rendered":"MIGRATEv10 Example 4: Finite Mass Source and Aquifer Mixing with Base Outflow"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"h-introduction\">Introduction<\/h2>\n\n\n\n<p>MIGRATEv10 Example 4 builds directly on Example 3 by introducing two critical real-world complexities:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A <strong>finite mass source<\/strong> (instead of constant concentration)<\/li>\n\n\n\n<li>An <strong>explicit aquifer boundary with flow and mixing (base outflow)<\/strong><\/li>\n<\/ul>\n\n\n\n<p>This example provides a more realistic representation of landfill behavior by simulating how a <strong>limited contaminant mass evolves over time<\/strong> and how it is diluted within a flowing aquifer.<\/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\">\u26a0\ufe0f <em>Important:<\/em> This example highlights key hydrogeologic assumptions. Proper application requires expert judgment and site-specific data.<\/p>\n<\/blockquote>\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 system consists of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A <strong>finite mass contaminant source<\/strong> at the top<\/li>\n\n\n\n<li>A <strong>4 m thick aquitard<\/strong> (low permeability layer)<\/li>\n\n\n\n<li>A <strong>20 m thick aquifer<\/strong> (only partially modeled for mixing)<\/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>This example aims to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Simulate <strong>mass-limited contaminant release<\/strong><\/li>\n\n\n\n<li>Evaluate <strong>leachate generation and migration<\/strong><\/li>\n\n\n\n<li>Quantify <strong>dilution in the aquifer<\/strong><\/li>\n\n\n\n<li>Demonstrate how to calculate and apply <strong>base outflow velocity (vb)<\/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-source-term-finite-mass-of-waste\">Source Term: Finite Mass of Waste<\/h2>\n\n\n\n<p>Unlike previous examples, the source is not infinite.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-waste-properties\">Waste Properties<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><th>Parameter<\/th><th>Value<\/th><\/tr><tr><td>Waste Thickness<\/td><td>6.25 m<\/td><\/tr><tr><td>Density<\/td><td>600 kg\/m\u00b3<\/td><\/tr><tr><td>Chloride Fraction<\/td><td>0.2%<\/td><\/tr><tr><td>Peak Concentration (c\u2080)<\/td><td>1000 mg\/L<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The analysis begins when <strong>peak concentration is reached<\/strong><\/li>\n\n\n\n<li>Chloride is treated as a <strong>conservative contaminant<\/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-leachate-generation\">Leachate Generation<\/h2>\n\n\n\n<p>Leachate collection is defined as:<\/p>\n\n\n\n<p>Q<sub>c<\/sub> = q<sub>o<\/sub> &#8211; v<sub>a<\/sub> = 0.3 &#8211; 0.03 = 0.27   m\/a<br> <\/p>\n\n\n\n<p>Where:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>( q<sub>o<\/sub> ) = infiltration through cover = 0.3 m\/a<\/li>\n\n\n\n<li>( v<sub>a<\/sub> ) = exfiltration through base = 0.03 m\/a<\/li>\n<\/ul>\n\n\n\n<p>This represents the <strong>net leachate collected<\/strong> by the system.<\/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-representation\">Aquifer Representation<\/h2>\n\n\n\n<p>Although the aquifer is <strong>20 m thick<\/strong>, only the <strong>upper 3 m<\/strong> is modeled.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-why\">Why?<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Full-depth mixing is unrealistic<\/li>\n\n\n\n<li>Mixing depends on:\n<ul class=\"wp-block-list\">\n<li>Monitoring screen depth<\/li>\n\n\n\n<li>Hydrogeologic conditions<\/li>\n\n\n\n<li>Regulatory requirements<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udc49 Therefore:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Modeled aquifer thickness (h) = 3 m<\/strong><\/li>\n\n\n\n<li>Output concentration at 4 m depth represents <strong>average concentration in top 3 m<\/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-flow-in-the-aquifer\">Flow in the Aquifer<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-inflow-to-aquifer\">1. Inflow to Aquifer<\/h3>\n\n\n\n<p>q{in} = v  *  h * L = 4  * 3 * 300 = 3600 m<sup>3<\/sup>\/a<\/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-flow-from-landfill\">2. Flow from Landfill<\/h3>\n\n\n\n<p>q<sub>a<\/sub> = v<sub>a<\/sub> * L * W = 0.03 * 300 * 200 = 1800 m<sup>3<\/sup>\/a<\/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-3-total-outflow\">3. Total Outflow<\/h3>\n\n\n\n<p>q{out} = q{in} + q<sub>a<\/sub> = 3600 + 1800 = 5400 m<sup>3<\/sup>\/a<\/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-4-base-outflow-velocity\">4. Base Outflow Velocity<\/h3>\n\n\n\n<p>v<sub>b<\/sub> = q{out} \/ (W  * h) = 5400 \/ (300 * 3) = 6 m\/a<br><\/p>\n\n\n\n<p>This parameter is critical because it defines how quickly contaminants are transported away in the aquifer.<\/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-modify-example-3-input-file\">Step 1: Modify Example 3 Input File<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Replace constant source with <strong>finite mass source<\/strong><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-2-define-geometry\">Step 2: Define Geometry<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Aquitard thickness: <strong>4 m<\/strong><\/li>\n\n\n\n<li>Aquifer thickness (modeled): <strong>3 m<\/strong><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-3-input-source-properties\">Step 3: Input Source Properties<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Peak concentration: <strong>1000 mg\/L<\/strong><\/li>\n\n\n\n<li>Define waste mass and composition<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-4-apply-flow-parameters\">Step 4: Apply Flow Parameters<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Infiltration and exfiltration rates<\/li>\n\n\n\n<li>Leachate collection rate (Qc)<\/li>\n\n\n\n<li>Base outflow velocity (vb = 6 m\/a)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-5-configure-boundary-conditions\">Step 5: Configure Boundary Conditions<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Aquifer represented as a <strong>mixing boundary<\/strong><\/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>Track concentration over time<\/li>\n\n\n\n<li>Evaluate depletion of source mass<\/li>\n\n\n\n<li>Analyze aquifer concentrations<\/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-concentration-vs-time\">Graphical Output: Concentration vs Time<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"804\" height=\"881\" src=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/image-35.jpg\" alt=\"\" class=\"wp-image-92293\" srcset=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/image-35.jpg 804w, https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/image-35-274x300.jpg 274w, https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/image-35-768x842.jpg 768w\" sizes=\"auto, (max-width: 804px) 100vw, 804px\" \/><\/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-example4.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-example4.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-finite-source-behavior\">1. Finite Source Behavior<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Concentrations decline over time as mass is depleted<\/li>\n\n\n\n<li>Unlike constant source cases, long-term impact is limited<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-aquifer-dilution\">2. Aquifer Dilution<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Concentration depends strongly on:\n<ul class=\"wp-block-list\">\n<li>Mixing depth (h)<\/li>\n\n\n\n<li>Base flow velocity (vb)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-sensitivity-to-aquifer-thickness\">3. Sensitivity to Aquifer Thickness<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Increasing modeled thickness \u2192 <strong>lower concentrations<\/strong><\/li>\n\n\n\n<li>Demonstrates importance of realistic assumptions<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-role-of-base-velocity\">4. Role of Base Velocity<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Higher vb \u2192 faster contaminant removal<\/li>\n\n\n\n<li>Lower vb \u2192 greater accumulation<\/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>Finite mass sources produce <strong>time-dependent contaminant release<\/strong><\/li>\n\n\n\n<li>Aquifer mixing assumptions significantly affect results<\/li>\n\n\n\n<li>Base outflow velocity is a <strong>critical modeling parameter<\/strong><\/li>\n\n\n\n<li>MIGRATEv10 allows realistic representation of <strong>mass balance and flow continuity<\/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-important-warning\">Important Warning<\/h2>\n\n\n\n<p>The calculation of <strong>base flow velocity (vb)<\/strong> is highly sensitive to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Site hydrogeology<\/li>\n\n\n\n<li>Landfill geometry<\/li>\n\n\n\n<li>Flow system changes after construction<\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udc49 This parameter <strong>must be determined by a qualified hydrogeologist or engineer<\/strong>. Incorrect assumptions can lead to significant errors in predicted concentrations.<\/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-final-thoughts\">Final Thoughts<\/h2>\n\n\n\n<p>MIGRATEv10 Example 4 represents a major step toward <strong>realistic landfill modeling<\/strong>, incorporating:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Finite contaminant mass<\/li>\n\n\n\n<li>Dynamic leachate generation<\/li>\n\n\n\n<li>Aquifer dilution and flow<\/li>\n<\/ul>\n\n\n\n<p>This example highlights the importance of <strong>mass balance, flow continuity, and hydrogeologic context<\/strong> in environmental modeling.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction MIGRATEv10 Example 4 builds directly on Example 3 by introducing two critical real-world complexities: This example provides a more realistic representation of landfill behavior by simulating how a limited contaminant mass evolves over time and how it is diluted within a flowing aquifer. \u26a0\ufe0f Important: This example highlights key hydrogeologic assumptions. Proper application requires [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":92295,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[858,1690],"tags":[1696,1697,1698,1226,821,675,1689],"class_list":["post-92292","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-contaminant-transport-modeling","category-migrateexamples","tag-aquifer-mixing","tag-base-outflow-velocity","tag-finite-mass-source","tag-groundwater-contamination","tag-hydrogeology","tag-landfill-modeling","tag-migratev10"],"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 Example 4 Finite Mass and Aquifer Mixing Explained - Knowledge Center<\/title>\n<meta name=\"description\" content=\"Explore MIGRATEv10 Example 4 to understand finite mass sources and aquifer mixing in landfill contaminant simulation.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/gaeatech.com\/knowledge-center\/migratev10-example-4-finite-mass-aquifer-mixing\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MIGRATEv10 Example 4: Finite Mass Source and Aquifer Mixing with Base Outflow\" \/>\n<meta property=\"og:description\" content=\"Explore MIGRATEv10 Example 4 to understand finite mass sources and aquifer mixing in landfill contaminant simulation.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/gaeatech.com\/knowledge-center\/migratev10-example-4-finite-mass-aquifer-mixing\/\" \/>\n<meta property=\"og:site_name\" content=\"Knowledge Center\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.linkedin.com\/company\/2663277\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-04-21T08:00:42+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/migratev10-example-4-finite-mass-aquifer-model.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1536\" \/>\n\t<meta property=\"og:image:height\" content=\"1024\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"GAEA Technologies\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"GAEA Technologies\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/migratev10-example-4-finite-mass-aquifer-mixing\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/migratev10-example-4-finite-mass-aquifer-mixing\\\/\"},\"author\":{\"name\":\"GAEA Technologies\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#\\\/schema\\\/person\\\/940fb5fed6e95dd9d0ec1370207f5dba\"},\"headline\":\"MIGRATEv10 Example 4: Finite Mass Source and Aquifer Mixing with Base Outflow\",\"datePublished\":\"2026-04-21T08:00:42+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/migratev10-example-4-finite-mass-aquifer-mixing\\\/\"},\"wordCount\":611,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/migratev10-example-4-finite-mass-aquifer-mixing\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/migratev10-example-4-finite-mass-aquifer-model.jpg\",\"keywords\":[\"Aquifer Mixing\",\"Base Outflow Velocity\",\"Finite Mass Source\",\"groundwater contamination\",\"hydrogeology\",\"landfill modeling\",\"MIGRATEv10\"],\"articleSection\":[\"Contaminant Transport Modeling\",\"MIGRATE Examples\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/migratev10-example-4-finite-mass-aquifer-mixing\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/migratev10-example-4-finite-mass-aquifer-mixing\\\/\",\"url\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/migratev10-example-4-finite-mass-aquifer-mixing\\\/\",\"name\":\"MIGRATEv10 Example 4 Finite Mass and Aquifer Mixing Explained - 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