Records of wells in sandstone and alluvial aquifers and chemical data for water from selected wells in the Navajo aquifer in the vicinity of the greater Aneth Oil Field, San Juan County, Utah

Hydrology, chemical quality, and characterization of salinity in the Navajo Aquifer in and near the Greater Aneth Oil Field, San Juan County, Utah

“…The chemical data used in this study were compiled from both U.S. Geological Survey and non-U.S. Geological Survey sources and cover more than 40 years (Mayhew and Heylmun, 1965;Avery, 1986;Rosenbauer and others, 1992;Kimball, 1992;and Spangler, 1992). Because the chemical data were not generated under uniform sampling and analytical protocols, quality-assurance and quality-control information are not available to assess the adequacy of the water-sample collection techniques or analytical methodology.…”

“…12). Changes in dissolved-solids concentrations throughout time, however, have been noted in water from selected wells (Avery, 1986;Spangler, 1992). Increases of greater than 50 percent in specific-conductance values or dissolved-solids concentrations have been documented in wells N4, N17, N35, and N45 (fig.…”

SALINITY INCREASES IN THE NAVAJO AQUIFER IN SOUTHEASTERN UTAH1

“…Most wells finished in the aquifer flow because the potentiometric surface is above land surface. Dissolved-solids concentrations in water from the Navajo aquifer ranged from 150 to 17,800 mg/L (Kimball, 1992;Spangler, 1992). Dissolved-solids concentrations generally increase along the ground-water flow path (Kimball, 1992), and increases in dissolved solids at the same well over time have also been documented (Avery, 1986;Spangler, 1992).…”

“…The chemical data used in this study were compiled from both USGS and non-USGS sources over a period of almost 40 years (Mayhew and Heylmun, 1965;Avery, 1986;Rosenbauer et al, 1992;Kimball, 1992;and Spangler, 1992). Because the chemical data were not generated under uniform sampling and analytical protocols, quality-assurance and qualitycontrol information is not available to assess the adequacy of the sample collection or chemical analyses.…”

“…Salinity increases in water in some parts of the Navajo aquifer in southeastern Utah (Figure 1) have been documented in recent years (Avery, 1986;Kimball, 1992;Spangler, 1992). Examples of increasing concentrations of dissolved solids in water from selected wells in the study area are shown in Figure 2.…”