{"id":92177,"date":"2026-04-20T13:00:04","date_gmt":"2026-04-20T13:00:04","guid":{"rendered":"https:\/\/gaeatech.com\/knowledge-center\/?p=92177"},"modified":"2026-04-13T23:37:25","modified_gmt":"2026-04-13T23:37:25","slug":"pollutev10-example-4-finite-mass-leachate-collection","status":"publish","type":"post","link":"https:\/\/gaeatech.com\/knowledge-center\/pollutev10-example-4-finite-mass-leachate-collection\/","title":{"rendered":"POLLUTEv10 Example 4: Finite Mass Source with Leachate Collection System"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"h-introduction\">Introduction<\/h2>\n\n\n\n<p>This example builds directly on the conceptual and numerical framework established in Case 3, introducing a more realistic landfill condition: a <strong>finite mass contaminant source<\/strong> combined with an active <strong>leachate collection system<\/strong>. This scenario better reflects modern engineered landfills, where contaminant release is limited by waste mass and partially controlled through collection infrastructure.<\/p>\n\n\n\n<p>The model simulates contaminant migration from a landfill through a low-permeability layer into an underlying aquifer, while accounting for declining source mass and reduced leachate flux due to collection.<\/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 hydrogeological system remains consistent with Case 3, with the following structure:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A <strong>4 m thick upper soil layer<\/strong> (aquitard)<\/li>\n\n\n\n<li>A <strong>finite mass contaminant source<\/strong> at the surface (landfill)<\/li>\n\n\n\n<li>A <strong>3 m thick aquifer<\/strong> beneath<\/li>\n\n\n\n<li>A <strong>fixed outflow boundary<\/strong> at the downgradient edge<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-key-enhancements-in-example-4\">Key Enhancements in Example 4:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Finite contaminant mass instead of constant concentration<\/li>\n\n\n\n<li>Inclusion of a <strong>leachate collection system<\/strong><\/li>\n\n\n\n<li>Adjusted groundwater velocities<\/li>\n\n\n\n<li>Time-dependent source behavior (though constant in this case due to assumptions)<\/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-landfill-geometry-and-hydrogeology\">Landfill Geometry and Hydrogeology<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Parameter<\/th><th>Symbol<\/th><th>Value<\/th><th>Units<\/th><\/tr><\/thead><tbody><tr><td>Landfill Length<\/td><td>L<\/td><td>200<\/td><td>m<\/td><\/tr><tr><td>Landfill Width<\/td><td>W<\/td><td>300<\/td><td>m<\/td><\/tr><tr><td>Aquifer Thickness<\/td><td>h<\/td><td>3<\/td><td>m<\/td><\/tr><tr><td>Aquifer Porosity<\/td><td>nb<\/td><td>0.3<\/td><td>&#8211;<\/td><\/tr><tr><td>Base Outflow Velocity<\/td><td>vb<\/td><td>6<\/td><td>m\/a<\/td><\/tr><tr><td>Time Range<\/td><td>t<\/td><td>25\u2013400<\/td><td>years<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Important Note:<\/strong><br>The landfill width (W) is perpendicular to groundwater flow and does not influence results in this 2D model.<\/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-finite-mass-source-calculation\">Finite Mass Source Calculation<\/h2>\n\n\n\n<p>Unlike previous examples, the contaminant source is defined by a <strong>finite mass of chloride<\/strong> within the waste.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-1-total-chloride-mass-per-unit-area\">Step 1: Total Chloride Mass per Unit Area<\/h3>\n\n\n\n<p><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>m<\/mi><mrow><mi>t<\/mi><mi>c<\/mi><\/mrow><\/msub><mo>=<\/mo><mn>0.002<\/mn><mo>\u00d7<\/mo><mn>600<\/mn><mo>\u00d7<\/mo><mn>6.25<\/mn><\/mrow><annotation encoding=\"application\/x-tex\">m_{tc} = 0.002 \\times 600 \\times 6.25<\/annotation><\/semantics><\/math><\/p>\n\n\n\n<p>Where:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chloride fraction = 0.2% (0.002)<\/li>\n\n\n\n<li>Waste density = 600 kg\/m\u00b3<\/li>\n\n\n\n<li>Waste thickness = 6.25 m<\/li>\n<\/ul>\n\n\n\n<p><strong>Result:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>m<\/mi><mrow><mi>t<\/mi><mi>c<\/mi><\/mrow><\/msub><mo>=<\/mo><mn>7.5<\/mn><mtext>\u2009<\/mtext><msup><mtext>kg\/m<\/mtext><mn>2<\/mn><\/msup><\/mrow><annotation encoding=\"application\/x-tex\">m_{tc} = 7.5 \\, \\text{kg\/m}^2<\/annotation><\/semantics><\/math><\/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-step-2-reference-height-of-leachate-hr\">Step 2: Reference Height of Leachate (Hr)<\/h3>\n\n\n\n<p><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>H<\/mi><mi>r<\/mi><\/msub><mo>=<\/mo><mfrac><msub><mi>m<\/mi><mrow><mi>t<\/mi><mi>c<\/mi><\/mrow><\/msub><msub><mi>c<\/mi><mn>0<\/mn><\/msub><\/mfrac><\/mrow><annotation encoding=\"application\/x-tex\">H_r = \\frac{m_{tc}}{c_0}<\/annotation><\/semantics><\/math><\/p>\n\n\n\n<p>Where:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>c<\/mi><mn>0<\/mn><\/msub><mo>=<\/mo><mn>1000<\/mn><mtext>\u2009<\/mtext><mtext>mg\/L<\/mtext><mo>=<\/mo><mn>1<\/mn><mtext>\u2009<\/mtext><msup><mtext>kg\/m<\/mtext><mn>3<\/mn><\/msup><\/mrow><annotation encoding=\"application\/x-tex\">c_0 = 1000 \\, \\text{mg\/L} = 1 \\, \\text{kg\/m}^3<\/annotation><\/semantics><\/math><\/li>\n<\/ul>\n\n\n\n<p><strong>Result:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>H<\/mi><mi>r<\/mi><\/msub><mo>=<\/mo><mn>7.5<\/mn><mtext>\u2009<\/mtext><mtext>m<\/mtext><\/mrow><annotation encoding=\"application\/x-tex\">H_r = 7.5 \\, \\text{m}<\/annotation><\/semantics><\/math><\/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-step-3-rate-of-increase-in-concentration-cr\">Step 3: Rate of Increase in Concentration (Cr)<\/h3>\n\n\n\n<p>Because peak concentration is reached early:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cr = 0 mg\/L\/a<\/strong><\/li>\n<\/ul>\n\n\n\n<p>This simplifies the model by eliminating time-dependent concentration buildup.<\/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-leachate-collection-system\">Leachate Collection System<\/h2>\n\n\n\n<p>A key addition in this example is the <strong>leachate collection system<\/strong>, which reduces contaminant loading to the subsurface.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-leachate-collection-rate\">Leachate Collection Rate<\/h3>\n\n\n\n<p><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>Q<\/mi><mi>c<\/mi><\/msub><mo>=<\/mo><msub><mi>q<\/mi><mi>o<\/mi><\/msub><mo>\u2212<\/mo><msub><mi>v<\/mi><mi>a<\/mi><\/msub><\/mrow><annotation encoding=\"application\/x-tex\">Q_c = q_o &#8211; v_a<\/annotation><\/semantics><\/math><\/p>\n\n\n\n<p>Where:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>q<\/mi><mi>o<\/mi><\/msub><mo>=<\/mo><mn>0.3<\/mn><mtext>\u2009<\/mtext><mtext>m\/a<\/mtext><\/mrow><annotation encoding=\"application\/x-tex\">q_o = 0.3 \\, \\text{m\/a}<\/annotation><\/semantics><\/math> (infiltration through cover)<\/li>\n\n\n\n<li><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>v<\/mi><mi>a<\/mi><\/msub><mo>=<\/mo><mn>0.03<\/mn><mtext>\u2009<\/mtext><mtext>m\/a<\/mtext><\/mrow><annotation encoding=\"application\/x-tex\">v_a = 0.03 \\, \\text{m\/a}<\/annotation><\/semantics><\/math> (vertical Darcy velocity)<\/li>\n<\/ul>\n\n\n\n<p><strong>Result:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>Q<\/mi><mi>c<\/mi><\/msub><mo>=<\/mo><mn>0.27<\/mn><mtext>\u2009<\/mtext><mtext>m\/a<\/mtext><\/mrow><annotation encoding=\"application\/x-tex\">Q_c = 0.27 \\, \\text{m\/a}<\/annotation><\/semantics><\/math><\/li>\n<\/ul>\n\n\n\n<p>This indicates that most infiltrating water is captured, significantly reducing contaminant migration.<\/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-groundwater-flow-conditions\">Groundwater Flow Conditions<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-upgradient-inflow-velocity\">Upgradient Inflow Velocity:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>v<\/mi><mrow><mi>i<\/mi><mi>n<\/mi><\/mrow><\/msub><mo>=<\/mo><mn>4<\/mn><mtext>\u2009<\/mtext><mtext>m\/a<\/mtext><\/mrow><annotation encoding=\"application\/x-tex\">v_{in} = 4 \\, \\text{m\/a}<\/annotation><\/semantics><\/math><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-downgradient-outflow-velocity\">Downgradient Outflow Velocity:<\/h3>\n\n\n\n<p><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>v<\/mi><mi>b<\/mi><\/msub><mo>=<\/mo><msub><mi>v<\/mi><mrow><mi>i<\/mi><mi>n<\/mi><\/mrow><\/msub><mo>+<\/mo><mfrac><mrow><msub><mi>v<\/mi><mi>a<\/mi><\/msub><mi>L<\/mi><\/mrow><mi>h<\/mi><\/mfrac><\/mrow><annotation encoding=\"application\/x-tex\">v_b = v_{in} + \\frac{v_a L}{h}<\/annotation><\/semantics><\/math><\/p>\n\n\n\n<p>Substituting values:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>v<\/mi><mi>b<\/mi><\/msub><mo>=<\/mo><mn>4<\/mn><mo>+<\/mo><mfrac><mrow><mn>0.03<\/mn><mo>\u00d7<\/mo><mn>200<\/mn><\/mrow><mn>3<\/mn><\/mfrac><mo>=<\/mo><mn>6<\/mn><mtext>\u2009<\/mtext><mtext>m\/a<\/mtext><\/mrow><annotation encoding=\"application\/x-tex\">v_b = 4 + \\frac{0.03 \\times 200}{3} = 6 \\, \\text{m\/a}<\/annotation><\/semantics><\/math><\/li>\n<\/ul>\n\n\n\n<p>This ensures <strong>mass balance<\/strong> across 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-transport-parameters\">Transport Parameters<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Property<\/th><th>Symbol<\/th><th>Value<\/th><th>Units<\/th><\/tr><\/thead><tbody><tr><td>Vertical Darcy Velocity<\/td><td>va<\/td><td>0.03<\/td><td>m\/a<\/td><\/tr><tr><td>Diffusion Coefficient<\/td><td>D<\/td><td>0.01<\/td><td>m\u00b2\/a<\/td><\/tr><tr><td>Distribution Coefficient<\/td><td>Kd<\/td><td>0<\/td><td>cm\u00b3\/g<\/td><\/tr><tr><td>Soil Porosity<\/td><td>n<\/td><td>0.4<\/td><td>&#8211;<\/td><\/tr><tr><td>Dry Density<\/td><td>\u03c1d<\/td><td>1.5<\/td><td>g\/cm\u00b3<\/td><\/tr><tr><td>Soil Thickness<\/td><td>H<\/td><td>4<\/td><td>m<\/td><\/tr><tr><td>Sub-layers<\/td><td>&#8211;<\/td><td>4<\/td><td>&#8211;<\/td><\/tr><tr><td>Source Concentration<\/td><td>co<\/td><td>1000<\/td><td>mg\/L<\/td><\/tr><tr><td>Rate of Increase<\/td><td>cr<\/td><td>0<\/td><td>mg\/L\/a<\/td><\/tr><tr><td>Ref. Height<\/td><td>Hr<\/td><td>7.5<\/td><td>m<\/td><\/tr><tr><td>Leachate Collected<\/td><td>Qc<\/td><td>0.27<\/td><td>m\/a<\/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-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=\"1007\" height=\"910\" src=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/image-15.jpg\" alt=\"\" class=\"wp-image-92178\" srcset=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/image-15.jpg 1007w, https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/image-15-300x271.jpg 300w, https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/image-15-768x694.jpg 768w\" sizes=\"auto, (max-width: 1007px) 100vw, 1007px\" \/><\/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%2Fpollute-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\/pollute-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<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-interpretation-of-results\">Interpretation of Results<\/h2>\n\n\n\n<p>This example highlights several important hydrogeological and modeling insights:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-finite-source-behavior\">1. Finite Source Behavior<\/h3>\n\n\n\n<p>Unlike constant concentration models, the finite mass source:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Limits total contaminant release<\/li>\n\n\n\n<li>Results in <strong>eventual depletion of the source<\/strong><\/li>\n\n\n\n<li>Produces more realistic long-term predictions<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-impact-of-leachate-collection\">2. Impact of Leachate Collection<\/h3>\n\n\n\n<p>The collection system:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reduces downward contaminant flux<\/li>\n\n\n\n<li>Decreases plume concentration and extent<\/li>\n\n\n\n<li>Represents modern landfill engineering controls<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-advective-transport-dominance\">3. Advective Transport Dominance<\/h3>\n\n\n\n<p>With:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Horizontal velocity = 4 m\/a<\/li>\n\n\n\n<li>Vertical velocity = 0.03 m\/a<\/li>\n<\/ul>\n\n\n\n<p>Transport is strongly <strong>horizontal in the aquifer<\/strong>, leading to plume elongation downgradient.<\/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-practical-applications\">Practical Applications<\/h2>\n\n\n\n<p>This modeling scenario is particularly relevant for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Landfill design and risk assessment<\/strong><\/li>\n\n\n\n<li><strong>Regulatory compliance modeling<\/strong><\/li>\n\n\n\n<li><strong>Evaluation of leachate collection efficiency<\/strong><\/li>\n\n\n\n<li><strong>Long-term contaminant fate predictions<\/strong><\/li>\n\n\n\n<li><strong>Phase II Environmental Site Assessments (ESA)<\/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-takeaways\">Key Takeaways<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Finite mass sources provide <strong>realistic contaminant release behavior<\/strong><\/li>\n\n\n\n<li>Leachate collection significantly reduces environmental impact<\/li>\n\n\n\n<li>Proper velocity balancing ensures <strong>accurate groundwater modeling<\/strong><\/li>\n\n\n\n<li>POLLUTEv10 can simulate <strong>complex engineered landfill systems<\/strong><\/li>\n<\/ul>\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 This example builds directly on the conceptual and numerical framework established in Case 3, introducing a more realistic landfill condition: a finite mass contaminant source combined with an active leachate collection system. This scenario better reflects modern engineered landfills, where contaminant release is limited by waste mass and partially controlled through collection infrastructure. The [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":92180,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[858,1632],"tags":[501,1639,1638,1226,821,675,677,1627],"class_list":["post-92177","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-contaminant-transport-modeling","category-pollute-examples","tag-contaminant-transport","tag-esa","tag-finite-source-model","tag-groundwater-contamination","tag-hydrogeology","tag-landfill-modeling","tag-leachate-collection","tag-pollutev10"],"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>POLLUTEv10 Example 4: Effective Leachate Management - Knowledge Center<\/title>\n<meta name=\"description\" content=\"Explore the POLLUTEv10 Example 4, showcasing a finite mass source with an advanced leachate collection system.\" \/>\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\/pollutev10-example-4-finite-mass-leachate-collection\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"POLLUTEv10 Example 4: Finite Mass Source with Leachate Collection System\" \/>\n<meta property=\"og:description\" content=\"Explore the POLLUTEv10 Example 4, showcasing a finite mass source with an advanced leachate collection system.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/gaeatech.com\/knowledge-center\/pollutev10-example-4-finite-mass-leachate-collection\/\" \/>\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=\"2026-04-20T13:00:04+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/04\/pollutev10-example-4-finite-mass-leachate-collection-hero.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\\\/pollutev10-example-4-finite-mass-leachate-collection\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/pollutev10-example-4-finite-mass-leachate-collection\\\/\"},\"author\":{\"name\":\"GAEA Technologies\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#\\\/schema\\\/person\\\/940fb5fed6e95dd9d0ec1370207f5dba\"},\"headline\":\"POLLUTEv10 Example 4: Finite Mass Source with Leachate Collection System\",\"datePublished\":\"2026-04-20T13:00:04+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/pollutev10-example-4-finite-mass-leachate-collection\\\/\"},\"wordCount\":703,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/pollutev10-example-4-finite-mass-leachate-collection\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/pollutev10-example-4-finite-mass-leachate-collection-hero.jpg\",\"keywords\":[\"contaminant transport\",\"ESA\",\"finite source model\",\"groundwater contamination\",\"hydrogeology\",\"landfill modeling\",\"leachate collection\",\"POLLUTEv10\"],\"articleSection\":[\"Contaminant Transport Modeling\",\"POLLUTE Examples\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/pollutev10-example-4-finite-mass-leachate-collection\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/pollutev10-example-4-finite-mass-leachate-collection\\\/\",\"url\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/pollutev10-example-4-finite-mass-leachate-collection\\\/\",\"name\":\"POLLUTEv10 Example 4: Effective Leachate Management - 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