• 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

    Changes in water infiltration capacities following burning of a ponderosa pine forest floor

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    azu_td_hy_e9791_1966_330_sip1_w.pdf
    Size:
    2.305Mb
    Format:
    PDF
    Download
    Author
    Zwolinski, Malcolm John
    Issue Date
    1966
    Keywords
    Hydrology.
    Forest ecology.
    Prescribed burning.
    Watershed management.
    
    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
    The practice of burning large acreages of forest lands in the West for the reduction of fuel hazards is currently accepted by certain land management agencies. Although these prescribed burns frequently accomplish their objectives, little attention has been given to the possible effects these have on watershed conditions. In Arizona, where the demand for water is increasing each year, and where large burning programs are in effect, the influences of burning on water infiltration into the soil is of particular importance. Literature on burning and infiltration relationships is inconclusive. Detrimental and beneficial effects to soils and infiltration capacities have been reported. During the summer of 1963, four sites were selected in the ponderosa pine region of east central Arizona. This study area was located five miles east of McNary on the Fort Apache Indian Reservation, where a large prescribed burning program has been underway since 1948. In July, a light burn and a heavy burn treatment, which approximated prescribed burning and wildfire conditions, respectively, were conducted on each of the four sites. Temperatures during treatments were measured with fusion pyrometers. Surface soil temperatures for the light burns did not exceed 200°F. Maximum temperatures at the soil surface for heavy burns ranged from 350°F. to 550°F. An infiltrometer plot, one by four feet in size, was installed in the center of each treatment area (unburned control, light burn, and heavy burn) on each site. A modified North Fork infiltrometer with constant head tank was utilized to conduct infiltration measurements. The twelve infiltrometer plots remained in place for 25 months, through two overwintering periods. Two infiltration runs were conducted on each plot in late summer,. 1963, and three series of runs were made in both the summers of 1964 and 1965. Infiltration curves were plotted for each run from runoff data programmed into a computer and incremental digital plotter. Infiltration capacity values were obtained directly from these curves. Light and heavy burns produced highly significant decreases in infiltration capacities immediately following burning. No statistically significant differences due to burning were detected between the burning treatments and controls during the second and third summers. It was concluded that the burning programs conducted in late fall on the Fort Apache Indian Reservation, when followed by an overwintering period with freezing and thawing conditions, cause no appreciable effect on watershed conditions. Additional results showed that nearly all the 96 infiltration curves plotted exhibited a pronounced dip after five to fifteen minutes of water application. Soil wettability or a resistance to wetting is felt to be an important factor in causing this depression; however, the extent and practical significance of this new phenomenon is uncertain. Increases in soil pH, carbon, and total nitrogen percentages for the surface two inches of soil were detected immediately following light and heavy burning treatments. These increases were still evident two years after treatment but to a lesser extent. A statistically significant increase in the bulk density of the surface one inch of soil, which was found immediately after burning, was not found after one overwintering period. Changes in the physical and chemical properties of the silt loam soils in the study area following burning were considered to be negligible.
    Type
    Dissertation-Reproduction (electronic)
    text
    Degree Name
    Ph. D.
    Degree Level
    doctoral
    Degree Program
    Watershed Management
    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.