Conceptual Design of Recharge & Recovery Facilities for IPR

Because recycled water is the only source that grows with population, it is becoming an increasingly important resource. M&A’s modeling efforts were key to assessing the feasibility of a recharge project involving recycled water and evaluating various design alternatives for a recovery wellfield.


Tucson Water currently distributes more than 15,000 AF/yr of recycled water for nonpotable uses, primarily irrigation. However, the amount of recycled water available for other uses will continue to grow and is anticipated to reach more than 30,000 AF/yr over the next several decades. This recycled water can be integrated into the supply system via IPR — the blending of treated recycled water into a natural source (in this case, a groundwater basin) — to augment drinking supplies.


M&A assisted in the conceptual design of recharge facilities, recovery wells, and advanced treatment facilities for this project:

  • Evaluated the technical feasibility of recharge and recovery at proposed sites
  • Developed conceptual plans for recharge basins and a recovery wellfield
  • Constructed a groundwater flow and solute-transport model
  • Calibrated this model based on the aquifer response to a nearby, large-scale recharge and recovery project and the sulfate concentrations in water recovered from this project
  • Conducted predictive modeling for a range of conceptual design alternatives for the recovery wellfield
  • Conducted particle tracking to assess the flow paths and capture of recycled water
  • Conducted multi-species transport modeling to quantify the potential mixing and component concentrations of recycled water, CAP water, and groundwater