OCR Text |
Show 51 is not known. Moderately saline ( 3,000- 10,000 mg/ 1) and very saline ( 10,000- 35,000 mg/ 1) groundwater is present in most of the area immediately west and north of the Lake. East Shore Area Groundwater The East Shore area is defined as the area between the mouth of the Bear River, the Wasatch Range, the mouth of the Jordan River, and Great Salt Lake. Bolke and Waddell ( 1972) state that the groundwater reservoir in that area consists of unconsolidated and semiconsolidated deposits, which range in grain size from clay to boulders. The principal aquifers consist of gravel or gravel and sand in the east half of the area, and of sand in the west half. Perched and water- table aquifers are found in the East Shore area, but artesian aquifers are the principal producers. The number, thickness, depth, and lithology of artesian aquifers varies throughout the East Shore area. Discharge to the Great Salt Lake-- A recent estimate of subsurface flow to the Great Salt Lake is available only for the Weber Delta Subdistrict portion of the East Shore area. Feth and others ( 1966) estimate that 20,000 to 70,000 acre- feet of water leave the Weber Delta subdistrict annually as subsurface flow to Great Salt Lake. A 1959 estimate of the total annual discharge by Wells in the East Shore area is 53,000 acre- feet ( Smith and Gates, 1963). Chemical Quality of Groundwater-- Most parts of the principal artesian aquifer bordering the Lake yield water with total dissolved solids of less than 500 mg/ 1, meeting U. S. Public Health Service standards for |