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Challenges and Experiences of Managed Aquifer Recharge in the Mexico City Metropolitan Area.

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Applied Geophysics for Managed Aquifer Recharge.

Timothy K Parker, John Jansen1, Ahmad-Ali Behroozmand2

  • 1Geophysics, Collier Consulting, 590 E. South Loop, Stephensville, TX, 76401.

Ground Water
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Summary
This summary is machine-generated.

Managed aquifer recharge (MAR) projects enhance water resilience. Geophysical methods offer cost-effective alternatives to invasive drilling for site selection and subsurface characterization in MAR projects.

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Area of Science:

  • Hydrogeology
  • Geophysics
  • Water Resource Management

Background:

  • Growing water stress and climate variability increase demand for managed aquifer recharge (MAR) to ensure water supply resilience.
  • Effective MAR project performance hinges on accurate site selection and understanding subsurface hydrogeologic properties.
  • Rising costs of invasive subsurface investigations, particularly drilling, necessitate cost-effective alternatives.

Purpose of the Study:

  • To review major geophysical methods for supplementing invasive subsurface investigations in MAR projects.
  • To highlight the cost-effectiveness of geophysical techniques compared to traditional drilling methods.
  • To provide an overview of commonly used surface and borehole geophysical techniques for MAR site characterization.

Main Methods:

  • Review of surface geophysical methods: time-domain electromagnetic (TEM) methods (airborne and ground-based), electrical resistivity, and seismic reflection.
  • Discussion of airborne electromagnetic (AEM) and towed array land-based TEM for efficient data acquisition.
  • Inclusion of borehole geophysics for near-borehole data and ground-truthing surface methods.

Main Results:

  • Geophysical methods are increasingly mainstream and cost-effective alternatives to invasive drilling, which provides only point data.
  • Airborne TEM offers rapid data collection and overcomes ground access limitations.
  • Electrical resistivity provides comparable resolution to TEM but requires more time; seismic reflection offers greater depth penetration and detailed geological information.

Conclusions:

  • Geophysical methods significantly supplement invasive investigations for MAR projects, offering valuable subsurface information.
  • Surface geophysical techniques like TEM and electrical resistivity, alongside borehole geophysics, provide essential data for MAR site selection and performance assessment.
  • The adoption of these geophysical methods enhances the cost-effectiveness and efficiency of MAR project planning and implementation.