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    Examining the Relationship Between Hydroclimatological Variables and High Flow Events

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    Author
    Fliehman, Ryan Mark
    Issue Date
    2012
    Keywords
    Streamflow
    Variables
    Atmospheric Sciences
    Hydroclimatic
    Principal Component Analysis
    Advisor
    Dominguez, Francina
    
    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
    In our study we identify dominant hydroclimatic variables and large-scale patterns that lead to high streamflow events in the Santa Cruz, Salt, and Verde River in Arizona for the period 1979-2009 using Principal Component Analysis (PCA). We used winter (Nov - March) data from the USGS daily streamflow database and 11 variables from the North American Reanalysis (NARR) database, in addition to weather maps from the Hydrometeorological Prediction Center (HPC). Using streamflow data, we identify precipitation events that led to the highest 98th percentile of daily streamflow events and find dominant hydroclimatic variables associated with these events. We find that upper level winds and moisture fluxes are dominant variables that characterize events. The dominant mode for all three basins is associated with frontal systems, while the second mode is associated with cut-off upper level low pressure systems. Our goal is to provide forecasting agencies with tools to improve flood forecasting practices.
    Type
    text
    Electronic Thesis
    Degree Name
    M.S.
    Degree Level
    masters
    Degree Program
    Graduate College
    Atmospheric Sciences
    Degree Grantor
    University of Arizona
    Collections
    Master's Theses

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