Flow model for the Bingham cienega area, San Pedro river basin, Arizona: a management and restoration tool

Persistent Link:
http://hdl.handle.net/10150/615701
Title:
Flow model for the Bingham cienega area, San Pedro river basin, Arizona: a management and restoration tool
Author:
Ronayne, Michael James; Maddock, Thomas, III
Affiliation:
Department of Hydrology & Water Resources, The University of Arizona
Publisher:
Department of Hydrology and Water Resources, University of Arizona (Tucson, AZ)
Issue Date:
1996-10
Rights:
Copyright © Arizona Board of Regents
Collection Information:
This title from the Hydrology & Water Resources Technical Reports collection is made available by the Department of Hydrology & Atmospheric Sciences and the University Libraries, University of Arizona. If you have questions about titles in this collection, please contact repository@u.library.arizona.edu.
Abstract:
A finite element groundwater flow model was used to support a hydrologic assessment for a study area in the Lower San Pedro River Basin which contains the Bingham Cienega. Consolidated sedimentary rocks associated with an extension of the Catalina Core Complex truncate the floodplain aquifer system in the study area. The elevated water table produced by this "hardrock" results in spring discharge at the cienega and a locally gaining reach of the San Pedro River. The steady -state model suggests that recharge (and discharge) components for the floodplain aquifer sum to 3.10 cfs. Mountain front recharge, underflow, and stream leakage are the primary recharge mechanisms, while stream leakage, evapotranspiration, spring flow, and underflow out are sources for groundwater discharge. A steady -oscillatory model was used to account for seasonal periodicity in the system's boundary conditions. Monthly variation in the evapotranspiration rate was offset primarily by storage changes in the aquifer. Due to a lack of measured hydrologic data within the study area, results from the model simulations are only preliminary. Model development and the subsequent sensitivity analyses have provided insight into what type of data needs to be collected. Head measurements are most needed in the area just downstream from Bingham Cienega. The mountain front recharge and evapotranspiration rates are shown to be highly sensitive parameters in the model; improved estimation of these values would be helpful. Spring discharge would be a valuable calibration tool if it could be accurately measured. A more extensive record of stream baseflow in the San Pedro River should be established. After more hydrologic data is collected, the model could be recalibrated so as to better represent the system. Eventually, this tool may be used in direct support of management and/or restoration decisions.
Keywords:
Hydraulic measurements -- San Pedro River Watershed (Mexico and Ariz.); Stream measurements -- San Pedro River Watershed (Mexico and Ariz.); Vegetation monitoring -- San Pedro River Watershed (Mexico and Ariz.); Hydraulic measurements.; Stream measurements.; Vegetation monitoring.
Series/Report no.:
Technical Reports on Hydrology and Water Resources, No. 96-050
Sponsors:
Research and development for this project was funded in part by the Arizona Chapter of The Nature Conservancy. The views and conclusions reported are those of the author and are not necessarily shared by The Nature Conservancy. We would like to give special thanks to Robert Mac Nish, Kate Baird and Kevin Lansey for their thoughtful comments on this document.

Full metadata record

DC FieldValue Language
dc.contributor.authorRonayne, Michael Jamesen
dc.contributor.authorMaddock, Thomas, IIIen
dc.date.accessioned2016-07-07T18:28:20Z-
dc.date.available2016-07-07T18:28:20Z-
dc.date.issued1996-10-
dc.identifier.urihttp://hdl.handle.net/10150/615701-
dc.description.abstractA finite element groundwater flow model was used to support a hydrologic assessment for a study area in the Lower San Pedro River Basin which contains the Bingham Cienega. Consolidated sedimentary rocks associated with an extension of the Catalina Core Complex truncate the floodplain aquifer system in the study area. The elevated water table produced by this "hardrock" results in spring discharge at the cienega and a locally gaining reach of the San Pedro River. The steady -state model suggests that recharge (and discharge) components for the floodplain aquifer sum to 3.10 cfs. Mountain front recharge, underflow, and stream leakage are the primary recharge mechanisms, while stream leakage, evapotranspiration, spring flow, and underflow out are sources for groundwater discharge. A steady -oscillatory model was used to account for seasonal periodicity in the system's boundary conditions. Monthly variation in the evapotranspiration rate was offset primarily by storage changes in the aquifer. Due to a lack of measured hydrologic data within the study area, results from the model simulations are only preliminary. Model development and the subsequent sensitivity analyses have provided insight into what type of data needs to be collected. Head measurements are most needed in the area just downstream from Bingham Cienega. The mountain front recharge and evapotranspiration rates are shown to be highly sensitive parameters in the model; improved estimation of these values would be helpful. Spring discharge would be a valuable calibration tool if it could be accurately measured. A more extensive record of stream baseflow in the San Pedro River should be established. After more hydrologic data is collected, the model could be recalibrated so as to better represent the system. Eventually, this tool may be used in direct support of management and/or restoration decisions.en
dc.description.sponsorshipResearch and development for this project was funded in part by the Arizona Chapter of The Nature Conservancy. The views and conclusions reported are those of the author and are not necessarily shared by The Nature Conservancy. We would like to give special thanks to Robert Mac Nish, Kate Baird and Kevin Lansey for their thoughtful comments on this document.en
dc.language.isoen_USen
dc.publisherDepartment of Hydrology and Water Resources, University of Arizona (Tucson, AZ)en
dc.relation.ispartofseriesTechnical Reports on Hydrology and Water Resources, No. 96-050en
dc.rightsCopyright © Arizona Board of Regentsen
dc.sourceProvided by the Department of Hydrology and Water Resources.en
dc.subjectHydraulic measurements -- San Pedro River Watershed (Mexico and Ariz.)en
dc.subjectStream measurements -- San Pedro River Watershed (Mexico and Ariz.)en
dc.subjectVegetation monitoring -- San Pedro River Watershed (Mexico and Ariz.)en
dc.subjectHydraulic measurements.en
dc.subjectStream measurements.en
dc.subjectVegetation monitoring.en
dc.titleFlow model for the Bingham cienega area, San Pedro river basin, Arizona: a management and restoration toolen_US
dc.typetexten
dc.typeTechnical Reporten
dc.contributor.departmentDepartment of Hydrology & Water Resources, The University of Arizonaen
dc.description.collectioninformationThis title from the Hydrology & Water Resources Technical Reports collection is made available by the Department of Hydrology & Atmospheric Sciences and the University Libraries, University of Arizona. If you have questions about titles in this collection, please contact repository@u.library.arizona.edu.en
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