• Login
    View Item 
    •   Home
    • UA Graduate and Undergraduate Research
    • UA Theses and Dissertations
    • Dissertations
    • View Item
    •   Home
    • UA Graduate and Undergraduate Research
    • UA Theses and Dissertations
    • Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Water use of two desert landscape tree species in Tucson, Arizona.

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    azu_td_9234906_sip1_m.pdf
    Size:
    2.956Mb
    Format:
    PDF
    Description:
    azu_td_9234906_sip1_m.pdf
    Download
    Author
    Levitt, Daniel Glenn.
    Issue Date
    1992
    Keywords
    Dissertations, Academic.
    Hydrology.
    Advisor
    Simpson, James R.
    
    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
    Although water conservation programs in the arid Southwest have prompted prudent landscaping practices such as planting low water use trees, there is little data on the actual water use of most species. Few methods or models have been developed for measuring tree water use. The stem heat balance method is one such method. Predictive models of tree water use have been limited to applications of the Penman-Monteith (PM) equation with varying degrees of success. The purpose of this study was: to validate stem flow gauge accuracy in a greenhouse and a desert environment; to determine the actual water use of two landscape tree species in Tucson, Arizona; to determine water use coefficients for two tree species based on the crop coefficient concept; and to test and develop a predictive model of tree water use based on the Penman-Monteith equation. Water use of oak (Quercus virginiana 'Heritage') and mesquite (Prosopis alba 'Colorado') trees in containers was measured using a precision balance and stem flow gauges. Water use coefficients for each tree species were calculated as the ratio of water use per total leaf area and per projected canopy area to reference evapotranspiration (ETo) using the Penman combination equation. After accounting for tree growth, water use coefficients on a total leaf area basis were calculated to be 0.48 and 0.97 for the oaks and mesquites, respectively, and 1.36 and 1.56 for the oaks and mesquites, respectively, on a projected canopy area basis. These coefficients indicate that mesquites (so called xeric trees) use more water than oaks (so called mesic trees) under non-limiting conditions. Stomatal resistances (r(s)) were calculated using the PM equation, and ranged from 20 to 200 s cm⁻¹. Calibrations were developed between r(s) and net radiation for both species. Results of the PM model to predict daily tree water use ranged from -15 to +150 percent error, depending on the tree, indicating the need for accurate measurements of stomatal resistance in order to use the PM model. Results indicate that a shortened form of the PM equation requiring only vapor pressure deficit and r(s) would be sufficient to predict tree water use.
    Type
    text
    Dissertation-Reproduction (electronic)
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Soil and Water Science
    Graduate College
    Degree Grantor
    University of Arizona
    Collections
    Dissertations

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.