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-38- <br />Table 3. Water quality parameters of the North Fork of the <br />Gunnison River at Somerset, Colorado. <br />Parameter Feb. 1978 May 1978 Aug 1978 <br />Average F1oW (cfs) 63 1,725 217 <br />pH 7.9 - 8.4 <br />Ca(mg/1) 20.0 21.0 19.0 <br />Mg(mg/I) 3.5 4.1 2.9 <br />Na(mg/Z) 8.I 8.3 4.9 <br />K(mg/I) 0.6 1.0 0.8 <br />11C03(mg/1) 79.0 86.0 73.0 <br />S04(mg/1) 12.0 14.0 15.0 <br />C1 (mg/I) 2.3 Z.6 I.I <br />Measured TDS(mg/1) 95.0 101.0 89.0 <br />TSS(mg/1) 30.0(2) 329.0(3) 204.0(3) <br />Sum of constituents <br />(meq/I)(1) 86.0 93.0 80.3 <br />Svm of cations(meq/1) 1.66 1.78 1.4I <br />Sum of anions(meq/1) 1.60 1.75 1.54 <br />1Ca + Mg + Na + K + XC03/2 + 504 = C1. <br />2Measured on March 13, 1979 <br />3Measured in 1979 <br />