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Figure 17 shows the ratio of sulfate to chloride in study <br />area waters. The Gunnison River has a ratio of approximately <br />20:2. Generally higher ratios occur on the south side of the <br />floodplain while equal or lower numbers occur on the north, <br />indicating somewhat different water sources feeding the <br />groundwater system at station 3 vs. that at station 19. The <br />backwater station 21 has a much higher sulfate to chloride ratio <br />than the Gunnison River, indicating again, salt enrichment from <br />groundwater discharged into backwater from the southern <br />floodplain area. <br />ESCALANTE STATE WILDLIFE AREA ON THE GUNNISON RIVER <br />~--- N <br />okf river charnel <br />t. °x--00 <br />4 . <br />S04/CI Ratio <br />Irrigation return <br />river cF~annel ~ backwater <br />,37 43.09 <br />32.05 6 <br />7.6 2 1 <br />56. <br />20. 3 ~ irrigation return <br />Cex~nison River <br />42.73 <br />35.58 <br />backwater 25J.9~4 p O Q <br />3.97 L/ponds <br />escarpment <br />~-~ Roubtdeau Leek <br />Figure 17. Ratio of sulfate to chloride (mg L-1) in study area <br />waters. <br />24 <br />