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• Water-level elevations in the alluvial ground water system <br />have varied substantially over the last several years. Figure 2.7- <br />41 shows the water-level elevations from 1984 through 1991 in the <br />Flume alluvial well, Coy. Water-level elevations in this well were <br />steadily rising in 1984 and 1985 due to the higher than normal <br />precipitation during this period of time and, therefore, higher <br />recharge rates. Water levels became fairly steady in 1986 and <br />1987, but have steadily declined in the Coy well since that time <br />due to the lower than normal recharge rates. Water-level <br />elevations between 1990 and 1991 declined, but at a slower rate <br />than in previous years, indicating some increase in recharge. <br />Water-level elevations in the upgradient alluvial well, GC3, are <br />presented in Figure 2.7-42 for the same period of time. Water <br />• levels in this well show a similar pattern, with recharge <br />increasing water levels quicker to a maximum level in 1984 and a <br />'smaller amount of decline Lo late 1990. A water level rise <br />actually occurred in 1991 due to the increase in precipitation in <br />the upgradient Flume well. The smaller cross sectional area of the <br />alluvial system at the upgradient site, GC3, probably allows the <br />same amount of recharge to change the water level a greater amount <br />in this area. Figures 2.7-38 and 2.7-39 show the water-level <br />elevations for May 1986 and September 1992 in the Elume alluvial <br />system at the Coy and GC3 sites. The area of saturated. thickness <br />has greatly decreased due to the dry cycle. <br />HH9ISFD 11/BJ192 <br />•~ <br />.... .. z-s76d 2 -~1-1t.~3 '' . _" <br />~_i~~,. ~~ is -- ; - __.-__ __ _ _-_ ~ . <br />~y~: <br />'ra`t's' lr~s'S:s:~'..-......._i.~,.~.n:r.;P}W.wt'_.}~.:.16`5rd~.1KSr~.A'C:a•;~ ~. ...ii _ :1: _.. ,~...-..~-~F4n,.!•t~. iia.S .~yi.u-4EuSCi:iCv.'.,'LYS <br />