Dissolved solids was
chosen as the indicator parameter
in this study for several reasons. First, dissolved
solids in the river have been a concern to local water managers,
water suppliers, and farmers in the lower Arkansas River Basin for
many years. Second, dissolved
solids also are a good indicator of the general water quality
in the study area and can be accurately estimated from available
specific-conductance data (Cain,
1987; Ortiz and others, 1998). Third, dissolved-solids concentrations
are sensitive to changes in streamflow, water operations, and source
contributions. Lastly, the use of dissolved-solids concentration
data combined with streamflow allows for analysis of mass loading
as a parameter of interest.
U.S. Department of the Interior
U.S. Geological Survey
Water Resources of Colorado
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May 4, 2004