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    A Critique of “Alluvial Fan Flooding Methodology: An Analysis” (DMA Consulting Engineers, 1985, Report to FEMA, Contract EMW-84-C-1488)

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    Author
    Fuller, J.
    Issue Date
    2012-03-28
    Keywords
    Arizona Geological Survey Contributed Reports
    Historic
    Holocene
    Modern
    Southwestern U.S.
    Arizona
    FEMA
    geologic hazard
    flood modelling
    flood
    alluvial fan
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    Citation
    Fuller, J. 2012, A Critique of “Alluvial Fan Flooding Methodology: An Analysis” (DMA Consulting Engineers, 1985, Report to FEMA, Contract EMW-84-C-1488). Arizona Geological Contributed Report 12-A.
    Description
    FEMA guidelines for floodplain delineations on active alluvial fans allow use the FAN methodology, a stochastic model based on work originally published by Dawdy (1979). In 1985, FEMA contracted with DMA Consulting Engineers (DMA) to perform an analysis of their alluvial fan methodology. FEMA regards the DMA study as the computational link between Dawdy’s theoretical model and the FAN program, as well as a verification of the FAN methodology (Lenaburg, 2010). The stated purpose of the DMA report was to evaluate and verify two key assumptions in the FEMA alluvial fan methodology: (1) that the location of a stream path on a fan surface is random, i.e., a channel has an equal probability of occurring anywhere across the fan, and that (2) flow forms its own channel and remains in one channel throughout the flow event, except when a channel avulses (p. 1).
    URI
    http://hdl.handle.net/10150/628757
    Additional Links
    http://repository.azgs.az.gov/uri_gin/azgs/dlio/1398
    Language
    en
    Series/Report no.
    CR-12-A
    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
    38.046
    South Bounding Coordinate
    31.5576
    West Bounding Coordinate
    -122.212
    East Bounding Coordinate
    -106.304
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    AZGS Document Repository
    AZGS Document Repository
    AZGS Document Repository
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