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    WATER QUALITY IN THE LOWER COLORADO RIVER AND THE EFFECT OF RESERVOIRS

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    Author
    Slawson, G. C.
    Affiliation
    Department of Hydrology & Water Resources, The University of Arizona
    Issue Date
    1972-07
    Keywords
    Water quality -- Colorado River (Colo.-Mexico)
    Saline waters -- Colorado River (Colo.-Mexico)
    Reservoirs -- Colorado River (Colo.-Mexico)
    Time-series analysis.
    
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    Publisher
    Department of Hydrology and Water Resources, University of Arizona (Tucson, AZ)
    Rights
    Copyright © Arizona Board of Regents
    Collection Information
    This title from the Hydrology & Water Resources Technical Reports collection is made available by the Department of Hydrology & Atmospheric Sciences and the University Libraries, University of Arizona. If you have questions about titles in this collection, please contact repository@u.library.arizona.edu.
    Abstract
    Comparison of the power spectra of TDS time series from different locations on the Lower Colorado River is useful in showing changes in salinity and for indicating physical factors influencing salinity. Similarities between the power spectra of the Lee Ferry and Grand Canyon tine series indicated that lateral inputs and evaporation are not greatly influencing the salinity cycle. The salinity change within this reach was approximated by a constant concentration change of 66.6 ppm. A similar model form was used for the Hoover Dam to Parker Dam reach. Dissimilarities between power spectra indicated that additional inputs are significant and must be accounted for in any model of such reaches. The model for Lake Mead required compensation for evaporation and for the inputs of the Virgin River and Las Vegas Wash. The modeled salinity increase between Parker Dam and Yuma contained a trend factor to allow for the effect of irrigation return flows and seepage. The crosscovariance function was used to approximate the time lag between data stations. Time series statistics, including coherence, response function spectra, and overall unit response, were used and are of utility in estimating salinity in a river system.
    Series/Report no.
    Technical Reports on Hydrology and Water Resources, No. 12
    Sponsors
    The work upon which this report is based was supported by funds provided by the United States Bureau of Reclamation, Region 3, and by an Allotment Grant from the Water Resources Research Center of the University of Arizona.
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    Hydrology & Water Resources Technical Reports

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