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<br />Table 8. Regression Information for estimating concentrations of major ions from measurements of specific conductance at <br />sites 1-6, White River, water years 1975-86 <br />[Regression signifi.cance increases as the coefficient of detennination (~) approaches. 1.0; mgIL, milligrams per liter; y. constituent concentration, <br />in milligrams per l~ter] <br /> Sample Regression data, <br />Constituent name where y = a + b (epeclllc conductance) <br />and symbol Coefficient of <br />(y) Number Range Coefficients Standard error determination <br /> (mglL) (a) (b) (SE) (r2) <br /> SITE I (WATER YEARS 1977-88) <br />Calcium (Ca) 36 23-61 0.95 0.152 3.71 0.90 <br />Magnesium (Mg) 36 4.7-11 1.11 0.026 0.61 0.90 <br />Potassium (K) 36 0.7-1.4 0.60 0.001 0.13 0.38 <br />Sodium (Na) 36 2.0-4.0 1.10 0.006 0.26 0.76 <br />Alkalinity (CaC03) 36 59-100 43.32 0.142 6.86 0.69 <br />Chloride (CI) 36 0.1-0.9 0.15 0.001 0.18 0.21 <br />Fluoride (F) 36 0.1-0.4 0.16 0.000 0.06 0,03 <br />Sulfate (S04) 36 23-100 -30.36 0.335 9.15 0.88 <br />Hardness (CaC03) 36 77-200 6.56 0.487 12.42 0.89 <br />Dissolved solids 36 105-257 12.17 0.625 15.63 0.89 <br /> SITE 2 (WATER YEARS t977-88) <br />Calcium (Ca) 31 30-54 6.75 0.125 2.64 0.80 <br />Magnesium (Mg) 31 6.7-11 2.09 0.026 0.71 0.71 <br />Potassium (K) 31 0.5-1.3 0.21 0.002 0.16 0.31 <br />Sodium (Na) 31 1.0-4.5 -0.27 0.009 0.60 0.30 <br />Alkalinity (CaC03) 3t 90-140 54.42 0.223 6.60 0.66 <br />Chloride (Cl) 31 0.3-2.9 -0.43 0.005 0.56 0.11 <br />Fluoride (F) 31 0.t-0.3 0.19 0.000 0.04 0.06 <br />Sulfate (S04) 31 7.3-46 -30.28 0.215 5.55 0.72 <br />Hardness (CaC03) 31 100-180 28.73 0.409 9.07 0.78 <br />Dissolved solids 31 110-209 13.25 0.564 11.18 0.81 <br /> <br />40 Sediment Trsnsport snd Water-Qusllty Characteristics and Loads, White River, Northwestern Colorsdo, Wster Years <br />1975-88 <br />