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Related Concept Videos

Net Change Theorem01:22

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The Net Change Theorem is a fundamental principle in calculus that establishes a direct relationship between a function’s rate of change and its accumulated change over an interval. Mathematically, it states that the definite integral of a function's derivative over a given interval [a,b] yields the net change in the original function:This theorem has significant applications in various real-world scenarios, including physics, economics, and engineering. A particularly useful application is in...
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Related Experiment Video

Updated: Jun 15, 2026

Laboratory-determined Phosphorus Flux from Lake Sediments as a Measure of Internal Phosphorus Loading
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Predicting DNAPL mass discharge from pool-dominated source zones.

John A Christ1, C Andrew Ramsburg, Kurt D Pennell

  • 1Department of Civil and Environmental Engineering, US Air Force Academy, Colorado Springs, CO, USA. john.christ@usafa.edu

Journal of Contaminant Hydrology
|March 16, 2010
PubMed
Summary

A new two-domain model accurately predicts dense non-aqueous phase liquid (DNAPL) dissolution in both pool- and ganglia-dominated source zones. This enhanced model aids in evaluating DNAPL source zone management strategies.

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Area of Science:

  • Environmental Science
  • Hydrogeology
  • Geochemistry

Background:

  • Dense non-aqueous phase liquid (DNAPL) contamination poses significant environmental challenges.
  • Existing upscaled models effectively predict mass removal in ganglia-dominated DNAPL source zones.
  • DNAPL pool-dominated source zones require adapted modeling approaches for accurate assessment.

Purpose of the Study:

  • To extend upscaled mass transfer modeling to DNAPL pool-dominated source zones.
  • To develop a two-domain model incorporating both ganglia and pools.
  • To evaluate the model's predictive capability across various DNAPL architectures.

Main Methods:

  • Modification of an existing upscaled mass transfer model.
  • Implementation of a two-domain representation (ganglia and pools).
  • Parameterization using initial pool fraction, contaminant elution, and flux-averaged concentration.

Main Results:

  • The two-domain model successfully reproduced dissolution behavior in pool-dominated scenarios.
  • Model predictions aligned with 3D numerical simulations and 2D aquifer cell experiments.
  • The model accurately predicts DNAPL dissolution for both ganglia- and pool-dominated zones.

Conclusions:

  • The developed two-domain upscaled model is effective for pool-dominated DNAPL source zones.
  • This approach enhances the evaluation of source zone management strategies for diverse DNAPL architectures.
  • The model provides reliable predictions across all mass recovery levels.