Creating an Empirically Based Model to Assess Infiltration Rates During Artificial Recharge at CAVSARP from 2013-2018
AuthorSolis-Arroyo, Sheila Sarai
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PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction, presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractArtificial recharge of groundwater is often achieved by infiltrating surface water into surface structures such as spreading basins. Tucson Water manages several artificial recharge projects including the Central Avra Valley Storage and Recovery Project (CAVSARP). CAVSARP consists of an intermittent multi-basin system responsible for the recharge of Central Arizona Project (CAP) water, originating from the Colorado River. Recharge basins are preferred structures for artificial recharge because they require little maintenance and are relatively easy to service. The main limit on spreading basins can be reduction in hydraulic conductivity over time due to suspended solids in surface water and anaerobic conditions. The purpose of this study is to create a simple, yet robust model that can interpret a time series of stage in the basin and measured inflow during artificial recharge periods to characterize whether the hydraulic conductivity is changing significantly over time. This could be used to trigger more detailed investigations by Tucson Water personnel to determine if a basin needs maintenance. The results of the study are in general agreement with a simpler assessment that is routinely performed by Tucson Water. However, with further refinement, it appears that the model developed here could be used to augment operational monitoring of basin performance.
Degree ProgramGraduate College