Modeling the Sensitivity of a Seasonalized Semi-arid Aquifer to the Quantity of Recharge and Evapotranspiration

Persistent Link:
http://hdl.handle.net/10150/293648
Title:
Modeling the Sensitivity of a Seasonalized Semi-arid Aquifer to the Quantity of Recharge and Evapotranspiration
Author:
Neff, Kirstin Lynn
Issue Date:
2013
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The Upper San Pedro River aquifer in Southern Arizona has been modeled using MODFLOW several times. The current model improves upon previous models by switching stream packages, adding a third season to represent the summer monsoon, and thereby creating a seasonalized steady-state oscillatory model. Recharge was seasonalized using a method to develop seasonal recharge estimates using ratios of seasonal precipitation to seasonal actual or potential evapotranspiration (ET). Maximum ET was seasonalized according to estimates of riparian groundwater consumption by vegetation in the study area. The model was run with inputs of 80%, 100% and 120% of base values for recharge and maximum ET rates to assess the sensitivity of the groundwater system and river to the seasonal timing and quantity of recharge and ET. The greatest amount of baseflow, 47%, occurred during the wet winter season, 35% occurred during the dry summer, and 18% during the wet summer (monsoon) season.
Type:
text; Electronic Thesis
Keywords:
hydrogeology; modeling; recharge; seasonalization; sensitivity analysis; Hydrology; evapotranspiration
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Hydrology
Degree Grantor:
University of Arizona
Advisor:
Maddock, Thomas

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleModeling the Sensitivity of a Seasonalized Semi-arid Aquifer to the Quantity of Recharge and Evapotranspirationen_US
dc.creatorNeff, Kirstin Lynnen_US
dc.contributor.authorNeff, Kirstin Lynnen_US
dc.date.issued2013-
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe Upper San Pedro River aquifer in Southern Arizona has been modeled using MODFLOW several times. The current model improves upon previous models by switching stream packages, adding a third season to represent the summer monsoon, and thereby creating a seasonalized steady-state oscillatory model. Recharge was seasonalized using a method to develop seasonal recharge estimates using ratios of seasonal precipitation to seasonal actual or potential evapotranspiration (ET). Maximum ET was seasonalized according to estimates of riparian groundwater consumption by vegetation in the study area. The model was run with inputs of 80%, 100% and 120% of base values for recharge and maximum ET rates to assess the sensitivity of the groundwater system and river to the seasonal timing and quantity of recharge and ET. The greatest amount of baseflow, 47%, occurred during the wet winter season, 35% occurred during the dry summer, and 18% during the wet summer (monsoon) season.en_US
dc.typetexten_US
dc.typeElectronic Thesisen_US
dc.subjecthydrogeologyen_US
dc.subjectmodelingen_US
dc.subjectrechargeen_US
dc.subjectseasonalizationen_US
dc.subjectsensitivity analysisen_US
dc.subjectHydrologyen_US
dc.subjectevapotranspirationen_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineHydrologyen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorMaddock, Thomasen_US
dc.contributor.committeememberMeixner, Thomasen_US
dc.contributor.committeememberFerré, Paul A.en_US
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