ASR-MAR Webinar Series

Guidance for Understanding and Minimizing Arsenic Mobilization in Aquifer Storage and Recovery Projects

Established in September 2019, the Aquifer Storage and Recovery - Managed Aquifer Recharge (ASR-MAR) Workgroup was formed to examine, discuss, and make recommendations to the GWPC Board of Directors regarding Aquifer Storage and Recovery (ASR) and Managed Aquifer Recharge (MAR) issues or topics.

Join us quarterly for webinars focusing on important technical issues surrounding ASR and MAR. 

Next Webinar:

Dec. 2, 2021 | 10:30 am - 12 pm (Central) 

Understanding and Mitigating Arsenic Mobilization during Managed Aquifer Recharge

Sarah Fakhreddine, Ph.D. | Postdoctoral Researcher | The University of Texas at Austin

Sarah Fakhreddine is an environmental engineer and geochemist studying the processes that control contaminant and nutrient mobility in the environment. Her work focuses on developing groundwater management solutions that account for complex biogeochemical interactions in aquifers in order to protect water quality for human and ecosystem health. She is currently a postdoctoral researcher in the Jackson School of Geosciences at the University of Texas at Austin. Prior to her current role, she served as a fellow with the Environmental Defense Fund working on implementation of sustainable groundwater management practices in the Western United States. She holds a Ph.D. in Environmental Earth System Science and M.S. in Environmental Engineering from Stanford University.

Topics Covered:

  • Managed aquifer recharge (MAR), inclusive of aquifer storage and recovery, can perturb native geochemical and hydrological conditions of the receiving aquifer, potentially mobilizing naturally occurring (geogenic) contaminants
  • Arsenic poses a particular challenge at MAR sites due to its ubiquity in subsurface sediments globally and toxicity at trace concentrations
  • A strong understanding of site-specific biogeochemical processes can be used to design MAR projects to mitigate contaminant mobilization and ensure the viability of water enhancement strategies
  • We present a framework for developing a site-specific conceptual model of arsenic mobility to understand and mitigate potential risks to water quality 

Treatment and Management of Injected Water During Aquifer Storage and Recovery to Minimize the Potential Release of Arsenic

Charles Werth, Ph.D. | Professor | University of Texas at Austin

Dr. Charles Werth is a Professor in Civil, Architectural and Environmental Engineering, and the Bettie Margaret Smith Chair in Environmental Health Engineering, at the University of Texas at Austin.  His research and teaching focus on the reactive transport and treatment of pollutants in soil and groundwater, as well as in engineered water treatment systems.  He is editor of Journal of Contaminant Hydrology, and previously served on the USEPA Science Advisory Board.    

Topics Covered:

  • Effects of Injected Water Quality on Groundwater Geochemistry and Arsenic Release
  • Treatment of Injected Water to Minimize the Potential of Arsenic Release
  • Management of the Storage and Recovery Times of Injected Water to Minimize the Potential of Arsenic Release 

Thank you for your interest! Please register online. We utilize GoTo Webinar for our virtual meeting platform. 



The ASR-MAR workgroup was formed in 2019 to examine, discuss, and make recommendations to the GWPC Board of Directors regarding Aquifer Storage and Recovery (ASR) and Managed Aquifer Recharge (MAR) issues or topics. 

The GWPC ASR-MAR Workgroup has been identified in the U.S. EPA National Water Reuse Action Plan (Action 2.7.4) as a leader to increase understanding of current aquifer storage and recovery practices. As part of the plan, the Workgroup facilitates meetings to study and find solutions to the challenges currently limiting the use of Enhanced Aquifer Recharge (EAR) and ASR-MAR.

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