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Show Total evapotranspiration ( Blaney- Criddle method) Less crop water requirement ( irrigation and May- September precipitation, from page 37) . . . Less October- April precipitation from precipitation map, pi. 2) Net evapotranspiration loss of ground water: . . . Long- term discharge records of the streams traversing the valley, from which ground- water discharge by effluent seepage could be calculated, are not available. Most of the valley bottom bordering Beaver Creek is marshy and contains abundant springs and seeps; most of the ground- water discharge to streams probably goes to Beaver Creek. A few springs are found in the bluff overlooking the Provo River, and the Provo is generally a gaining stream in the reach between the gaging stations near Woodland and near Hailstone ( p. 10). The estimated minimum average annual discharge to Beaver Creek, Weber River, and Provo River is 12,000 acre- feet per year. Chemical quality.- Chemical analyses of two samples of water from wells that tap the unconsolidated deposits in Rhodes Valley are reported in table 5. Both samples were dilute calcium bicarbonate type water. One sample, from a well near the south end of the valley and very near an outcropping of the Tertiary volcanic rocks, contained 289 mg/ l dissolved solids. This water was relatively high in silica ( 40 mg/ l) and contained about equal concentrations of sulfate and chloride ( 14 and 13 mg/ l, respectively). The water is evidently affected by recharge from the nearby volcanic rocks. The second sample of water was from a well near the north end of the valley, distant from the volcanic rocks. This water contained 205 mg/ l of dissolved solids, was low in silica ( 5.5 mg/ l), and contained about four times as much sulfate as chloride ( 13 and 3.9 mg/ l, respectively). Subsurface recharge that affects this water comes from the sandstones and limestones of Jurassic age and older. These two samples are probably typical of the water from the unconsolidated deposits in Rhodes Valley. The water, although hard, is quite suitable for domestic, livestock, and irrigation use. Parleys Park Parleys Park is the name given to the broad, gently rolling flat north of Park City ( see pi. 1 and fig. 1). A ridge of low hills, extending east- northeast from Quarry Mountain, divides the south end of the park into two arms. The narrow eastern arm is the valley of Silver Creek, which heads in Empire Canyon south of Park City, flows around the east side of Quarry Mountain, continues northeast, and joins the Weber River about 2 miles north of Wanship Dam. The wider western arm and the broad flat north and west of the hills drains to East Canyon Creek. East Canyon Creek rises in the mountains north of Parleys Park and flows through the northern part of the park, collecting the water of several small streams that flow generally northward through the park. The creek then turns northward through a narrow canyon and joins the Weber River about 20 miles north of Parleys Park. . 72,000 - 40,000 - 22,000 . 10,000 41 |