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<br />.q"",~' ,")p.'," <br />, ..' _ \..).J j <br /> <br />Water types <br />(milliequivalents per liter) <br /> <br />Classifi- <br />cation <br /> <br />Hardness <br />Bivalent cations; <br />calcium and magne- <br />sium (milligrams <br />per liter as CaC03) <br /> <br /> <br />Table 3.--Chemical criteria used to classify water types and hardness <br /> <br />[Water types, modified from Piper and others, 1953, p. 26; <br />hardness, modified from Durfor and Becker, 1964, p. 27] <br /> <br />Cations <br /> <br />Single cation used <br />when it amounts to <br />50 percent or more <br />of the total cation <br />equivalents; when <br />the above does not <br />exist, the largest <br />percentages of two <br />cations are used. <br /> <br />Anions <br /> <br />Single anion used <br />when it amounts to <br />50 percent or more <br />of the total anion <br />equivalents; when <br />the above does not <br />exist, the largest <br />percentages of two <br />anions are used. <br /> <br />Soft---n- Less than 60. <br />Moderately 61-120. <br />hard---- <br />Hard------ 121-180. <br />Very hard- More than 180. <br /> <br />The general water quality in the White River at site 3 and in Kenney <br />Reservoir (tables 4 and 5) was determined from milliequivalent conversions of <br />concentrations of cations and anions. The water types changed from a hard to <br />very hard calcium bicarbonate type during high-flow conditions (greater than <br />3,500 ft3/s) to a very hard calcium magnesium sulfate bicarbonate type during <br />low-flow or base-flow conditions (less than 400 ft3/s). Although not shown, <br />regressions were developed that related concentrations of the major constitu- <br />ents to specific conductance for the White River and Kenney Reservoir. Tests <br />for similarity of data at the 0.05 level of significance indicated that the <br />water chemistry for the major constituents was statistically similar at all <br />sites. The relations of the dissolved-solids concentrations and percent <br />composition of major ions to water discharge are shown in figure 13. <br /> <br />25 <br />