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A Generic Closed-Loop Contaminant Treatment System Package for MODFLOW 6.

Jeremy T White, John E Ewing¹, Greg Ruskauff²

¹INTERA Inc., Austin, TX, USA.

|January 3, 2023

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A new contaminant treatment system (CTS) package for MODFLOW 6 simulates groundwater remediation pump-and-treat systems. This flexible, API-based tool enhances contaminant transport modeling with adjustable well configurations and treatment efficiencies.

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Area of Science:

Hydrogeology
Environmental Engineering
Computational Modeling

Background:

Groundwater contamination necessitates effective remediation strategies.
Simulating complex remediation systems like pump-and-treat requires advanced modeling tools.
Existing models may lack the flexibility to capture dynamic treatment processes.

Purpose of the Study:

To introduce a novel contaminant treatment system (CTS) package for MODFLOW 6.
To enable the simulation of pump-and-treat systems for groundwater remediation.
To provide a flexible and adaptable tool for contaminant transport modeling.

Main Methods:

Development of a CTS package leveraging the MODFLOW 6 application programming interface (API).
Implementation of flow balancing for extraction and injection wells within the outer flow solution loop.
Integration of blended concentration/mass treatment efficiency within the outer transport solution loop.
Enabling temporal variation of CTS system parameters, including well configurations and treatment efficiency.

Main Results:

The CTS package successfully integrates with MODFLOW 6, facilitating realistic pump-and-treat simulations.
The API-based approach ensures compatibility with various MODFLOW 6 features and future updates.
The system allows for dynamic adjustments to well operations and treatment effectiveness.

Conclusions:

The developed CTS package offers a versatile and robust solution for simulating groundwater remediation.
Its flexible design and API implementation ensure broad applicability and long-term usability.
This tool advances the capability of numerical modeling for contaminant transport and remediation assessment.