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    Historical channel changes on the San Pedro River, southeastern Arizona

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    Author
    Huckleberry, G.
    Issue Date
    1996-06-01
    Keywords
    Arizona Geological Survey Open File Reports
    Pima County
    Cochise County
    San Pedro River
    Arizona
    navigability
    geomorphology
    alluvial channels
    hydrology
    Geology
    Recent
    Holocene
    San Pedro River Valley
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    Citation
    Huckleberry, G., 1996, Historical channel changes on the San Pedro River, southeastern Arizona. Arizona Geological Survey Open File Report, OFR-96-15, 22 p.
    Description
    The San Pedro River in southeast Arizona is by no means a major watercourse in the Southwest, but yet it is probably one of the most-studied rivers in the region. In particular, the upper San Pedro River has been the topic of study by geologists, geographers, hydrologists, and ecologists interested in environmental change (see Bahr, 1991 and Cooke and Reeves, 1976 for an overview). Since 1870, inhabitants of the San Pedro River Valley have witnessed substantial vegetation change (Bahr, 1991; Henderson and MinkIey, 1986; Hastings, 1959; Hastings and Turner, 1965; Leopold, 1951) as well as changes in the geometry and hydrologic regime of the river (Cooke and Reeves, 1976; Hereford, 1993; Hereford and Betancourt, 1993). After decades of multidisciplinary research, the chronology of historic channel changes, at least on the upper San Pedro River, is well defined, although the reasons why the channel has changed are still debated (i.e., natural vs. anthropogenic forces). What the physical characteristics of the San Pedro River were in 1912 is the topic of this report. Because the State of Arizona's claim to ownership of river channels within its boundaries hinges on their navigability at time of statehood, this report is designed to provide baseline information on the historical physical characteristics of the San Pedro River channel and how they have changed through time. It is clear that the San Pedro River was experiencing changes in channel geometry in 1912, but unfortunately there are few descriptions of the channel during that year. The physical characteristics of the river thus must be interpolated from descriptions made before and after 1912. Understanding the geomorphic properties of the river helps to refine the interpolation. ( 35 pages)
    URI
    http://hdl.handle.net/10150/629786
    Additional Links
    https://library.azgs.arizona.edu/item/AOFR-1552429331109-309
    Language
    en
    Series/Report no.
    OFR-96-15
    Rights
    Arizona Geological Survey. All rights reserved.
    Collection Information
    Documents in the AZGS Document Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at the University of Arizona. For more information about items in this collection, please contact azgs-info@email.arizona.edu.
    North Bounding Coordinate
    33.3031
    South Bounding Coordinate
    31.335
    West Bounding Coordinate
    -111.05
    East Bounding Coordinate
    -110.116
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