Journal of Geology & Geophysics
Open Access

Kathryn W. Thorbjarnarson

Publications

• Research Article
  Simulating Arsenic Mitigation Strategies in a Production Well
  Author(s): Dara A. Goldrath, John A. Izbicki, Kathryn W. Thorbjarnarson Dara A. Goldrath, John A. Izbicki, Kathryn W. Thorbjarnarson
  
  Water from well 5N/4W-31A1 in the regional aquifer in the Mojave River groundwater basin 97 kilometers north east of Los Angeles, California, occasionally exceeds the U.S. EPA Maximum Contaminant Limit for arsenic of 10 micrograms per liter (μg/L). Coupled well-bore flow and depth-dependent water-quality sampling for this well show arsenic concentrations less than 0.12 μg/L entering the well from the aquifer in the upper 163 meters (m) below land surface (bls). Arsenic concentration increase with depth to a maximum of 17.6 μg/L at 213 m bls. High arsenic in the deeper part of the well are associated with pH greater than 9 and dissolved oxygen concentrations less than 0.2 milligrams per liter. An axially-symmetric, radial groundwater flow simulation, developed using the computer program AnalyzeHOLE, was used to simulate flow to the well under pumping conditions. Simulations sh.. View More»
  DOI: 10.4172/2381-8719.1000218

  Abstract PDF

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