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<br />. <br /> <br />:,.) <br />.l:o <br />CD <br />rv <br /> <br />. <br /> <br />. <br /> <br />CHAPTER I I <br /> <br />NEED POR ACTION <br /> <br />As shown in Table 3, about 40 percent (52,000 tons) of the salt in <br />the Dotsero area comes from the eight identified sprinKs and the re- <br />mainder (74,000 tons) comes from ground water inflow. In the GlenwQod <br />Springs area, about SS percent (174,000 tons) of the salt is from iden- <br />tified springs and the remainder (129,000 tons) comes from ground water <br />inflow, The inflow to the Colorado River from the identified springs <br />and from ground water inflow Is proportional to the salt loading in the <br />Dotsero and Glenwood Springs areas, <br /> <br />At Glenwood Springs. there appear to be twO sources of unmeasured <br />inflow. One of the sources is associated with bedrock fractures toward <br />the east portion of the springs area, and the other is saline-saturated <br />alluvium toward the west portion. Saturated alluvium appears to be the <br />source of the unmeasured saline water at Dotsero. Because all of the <br />inflows are from point sources, the error of estimate for potential salt <br />reduction is lower than for irrigation source units, <br /> <br />14 <br />