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<br />,. <br /> <br />.1 <br />. <br /> <br />} <br />. <br /> <br />Water-Supply Paper - Chapter C. <br /> <br />..... <br />~ <br />,J;:.. <br />o <br /> <br />DETERMINATION OF NATURAL DISSOLVED SOLIDS IN THE <br />UPPER COLORADO RIVER BASIN <br /> <br />Abstract <br /> <br />I. Introduction <br /> <br />A. P~po$e and scope <br />B. Brief background <br /> <br />II, Development of method to simulate transport of dissolved solids under <br />natural conditions <br /> <br />A. Selection of calibration reaches to use <br /> <br />B. Regression and/or time series model development <br /> <br />C. Selection of variables as input to regression model <br /> <br />D. Moqel verification <br /> <br />a. Test model results with split sample <br />b. Test model results against "Irons, et. al." results <br /> <br />III. Application of natural salt load model <br /> <br />A. Run regression/time series models for other stations not used in. <br />mqdel development <br /> <br />B. Simulate natural loads bymonth for each of the key stations <br /> <br />C, Use of models (modeling actual loads based on future land-use <br />sdenarios. estimation of annual natural loads based on annual <br />n~tural flow or precipitation*) <br /> <br />IV. Results and conclusions <br /> <br />A. Purpose for determining natural dissolved solids loads <br /> <br />B. SummarY of model development with limitations <br />V. References <br /> <br />VI. Appendix of Natural Dissolved-Solids Values <br /> <br />16 <br /> <br />,',',,- <br /> <br />-'i'_".::, <br /> <br /> <br />'-:i <br /> <br /> <br /> <br />