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The study area includes about 700 square miles of the southern Wasatch Plateau in central Utah and is underlain by extensive reserves. Data for four streamflow-gaging stations in the area indicate that about 5 to 29 percent of the average annual precipitation on a drainage basin becomes streamflow. Annual peak discharge generally is from snowmelt during spring or early summer; 46 to 68 percent of the average annual discharge occurs during April-June. Discharge measurements indicate that most of the base flow of streams is due to ground-water discharge in the higher altitudes of the watersheds. Chemical quality of 61 surface-water samples was suitable for most uses; dissolved-solids concentrations ranged from 97 to 835 milligrams per liter. None of the analyzed chemical constituents were in concentrations that exceeded the drinking-water standards of the US Environmental Protection Agency. The predominant dissolved ions in most of the surface waters were calcium, magnesium, and bicarbonate. About 170 springs were inventoried during the study. Most water moves through the ground-water system through fractures and solution openings. Dewatering of one underground coal mine was the only known manmade discharge from the ground-water system in the study area during 1980. Chemical quality of ground water generally wasmore » suitable for most uses; dissolved-solids concentrations in water from 87 springs ranged from 105 to 1,080 milligrams per liter and averaged about 380 milligrams per liter. 29 references.« less

Hydrology of coal-resource areas in the southern Wasatch Plateau, central Utah