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    Using Geochemical Tracers to Determine Aquifer Connectivity, Flow Paths, and Base-Flow Sources: Middle Verde River Watershed, Central Arizona

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    Author
    Zlatos, Caitlan McEwen
    Issue Date
    2008
    Keywords
    base-flow sources
    complex hydrogeology
    geochemical tracers
    groundwater-surface water interactions
    mixing models
    principal components analysis
    Advisor
    Hogan, James
    Meixner, Thomas
    Committee Chair
    Hogan, James
    Meixner, Thomas
    
    Metadata
    Show full item record
    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
    Combining geochemical data with physical data produces a powerful method for understanding sources and fluxes of waters to river systems. This study highlights this for river systems in regions of complex hydrogeology, shown here through the identification and quantification of base-flow sources to the Verde River and its tributaries within the middle Verde River watershed. Specifically, geochemical tracers (major solutes, stable and radioactive isotopes) characterize the principal aquifers (C, Redwall-Muav, and Verde Formation) and provide a conceptual understanding of the hydrologic connection between them. For the surface-water system, PCA is utilized to identify potential base-flow sources to the Verde River on a several-kilometer scale. Solute mixing diagrams then provide relative inputs of these sources, and when combined with stream discharge, allow for quantification of water sources. The results of this study provide an improved conceptual model that reveals the complexity of groundwater-surface water exchanges in this river basin.
    Type
    text
    Electronic Thesis
    Degree Name
    M.S.
    Degree Level
    masters
    Degree Program
    Hydrology
    Graduate College
    Degree Grantor
    University of Arizona
    Collections
    Master's Theses

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