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Show " 1 0 w 1 2 E 18 1 0 1 2 - 1 4 _ 1 1 I 1 1 1 1 I 1 1 1 1 _ - 1 948 " - \ r~^ V \/ \ r oyed , - - des t _ - CD - ' ( D- i - 4) 31dbd- 1 i i i i i i 1 1 1 1 1 1 936 1 937 1 938 1 939 1 940 1 941 1 942 943 1 944 1 945 1 946 1 948 Figure 18.- Graphs of water levels in wells tapping the unconsolidated deposits in Parleys Park. saturated thickness is 40 feet, the area 21 square miles ( about 13,000 acres), and the specific yield 15 percent, the volume of recoverable water in storage is about 80,000 acre- feet. As in the other calculations of storage, this volume of water is theoretically recoverable by dewatering the aquifer; dewatering the aquifer, however, may not be practicable in the foreseeable future. The combined discharge from wells and discrete springs in the unconsolidated deposits in Parleys Park is small. Large seeps or marshy areas are common in the park, however, especially during the summer months; and these areas discharge large quantities of ground water by evapotranspiration. The total evapotranspiration from the park is calculated by the Blaney- Criddle method as 43,000 acre- feet per year based on air temperatures measured at Park City during the period 1921- 50. Ground water is also discharged directly to Silver Creek and to East Canyon Creek and its tributaries; all the streams in the park appear to be gaining streams most of the year. It is possible that water also moves from the unconsolidated deposits into the consolidated rocks at the north end of the park. 44 |