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University of Arizona (1988)

Simulations of dry well recharge in the Tucson Basin, Arizona

Bandeen, Reid Francis

Titre : Simulations of dry well recharge in the Tucson Basin, Arizona

Auteur : Bandeen, Reid Francis

Université de soutenance : University of Arizona

Grade : Master of Science (MS) 1988

Résumé
The variably saturated flow model Unsat 2 was used for three case study simulations of dry well recharge in the Tucson Basin, Arizona. Dry well design, and rainfall/runoff and vadose zone conditions representative of the locality were assumed in the simulations to address travel time to the regional aquifer, rates and extent of radial flow, and relative degree of solute attenuation by sorption and dilution with regional groundwater. Soil specific surface was used to estimate relative degree of sorption among the three cases. One case of uniform soil composition and two cases of layered soil composition were simulated. Clay content had the greatest influence on specific surface. Hydraulic conductivity had the greatest influence on soil water velocities and degree of radial flow. The presence of layered subsurface conditions that included strata of low hydraulic conductivity enhanced the degree of subsurface solute attenuation by sorption and dilution.

Mots clés : Artificial groundwater recharge — Arizona — Tucson Region. ; Urban runoff — Arizona — Tucson Region — Mathematical models.

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