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Monument Creek debris flow, 1984: Implications for formation of rapids on the Colorado River in Grand Canyon National Park

1988; Geological Society of America; Volume: 16; Issue: 1 Linguagem: Inglês

10.1130/0091-7613(1988)016 2.3.co;2

1943-2682

Robert H. Webb, Patrick T. Pringle, Steven L. Reneau, Glen R. Rink,

Hydrology and Sediment Transport Processes

Research Article| January 01, 1988 Monument Creek debris flow, 1984: Implications for formation of rapids on the Colorado River in Grand Canyon National Park Robert H. Webb; Robert H. Webb 1U.S. Geological Survey, 300 W. Congress Street, Tucson, Arizona 85791 Search for other works by this author on: GSW Google Scholar Patrick T. Pringle; Patrick T. Pringle 2Cascades Volcano Observatory, U.S. Geological Survey, 5400 MacArthur Boulevard, Vancouver, Washington 98661 Search for other works by this author on: GSW Google Scholar Steven L. Reneau; Steven L. Reneau 3Department of Geology and Geophysics, University of California, Berkeley, California 94720 Search for other works by this author on: GSW Google Scholar Glen R. Rink Glen R. Rink 1U.S. Geological Survey, 300 W. Congress Street, Tucson, Arizona 85791 Search for other works by this author on: GSW Google Scholar Author and Article Information Robert H. Webb 1U.S. Geological Survey, 300 W. Congress Street, Tucson, Arizona 85791 Patrick T. Pringle 2Cascades Volcano Observatory, U.S. Geological Survey, 5400 MacArthur Boulevard, Vancouver, Washington 98661 Steven L. Reneau 3Department of Geology and Geophysics, University of California, Berkeley, California 94720 Glen R. Rink 1U.S. Geological Survey, 300 W. Congress Street, Tucson, Arizona 85791 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1988) 16 (1): 50–54. https://doi.org/10.1130/0091-7613(1988)016 2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Robert H. Webb, Patrick T. Pringle, Steven L. Reneau, Glen R. Rink; Monument Creek debris flow, 1984: Implications for formation of rapids on the Colorado River in Grand Canyon National Park. Geology 1988;; 16 (1): 50–54. doi: https://doi.org/10.1130/0091-7613(1988)016 2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract A recent debris flow in Monument Creek illustrates the nature of debris flows in small tributaries and their hydrologic effects on the Colorado River in Grand Canyon National Park. A debris avalanche originated in the Permian Esplanade Sandstone of the Supai Group during intense rainfall on July 27, 1984, and fell 600 m into Monument Creek, forming a 7-m-high barrier across the channel. The subsequent debris flow traveled 4.5 km to the Colorado River and achieved velocities of 3.4 to 4.0 m/s and a peak discharge of 100 to 120 m3/s. The flow consisted of a main pulse followed by subsequent pulses of debris flow or hyperconcentrated flow. The main pulse moved boulders as large as 2.7 m in diameter, and deposition at the mouth of Monument Creek enlarged the fan surface and significantly constricted the Colorado River. Most of the major rapids on the Colorado River in Grand Canyon National Park appear to be maintained by episodic debris flows. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.