Ground-water levels and water quality in an area near Topaz Lake, Douglas County, Nevada

Nowlin, Jon O.

doi:10.3133/ofr802046

Cited by 13 publications

(7 citation statements)

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“…According to chemical analyses presented by Harrill (1973) for Lemmon Valley, Nev., in most cases where nitrate concentrations were elevated, the Na-to-Cl ratio was less than 2:1. Nowlin (1982) investigated sources of nitrate contamination near Topaz Lake in Nevada and found that elevated concentrations of nitrate were associated with Na-to-Cl ratios in the range 0.9 to 1.7.…”

Section: Chemical Components Of Domestic Sewagementioning

confidence: 99%

Methods for identifying sources of nitrogen contamination of ground water in valleys in Washoe County, Nevada

Seiler¹

1996

Open-File Report

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Nitrate concentrations exceeding drinkingwater standards have been reported in several wells in Lemmon and Golden Valleys in Washoe County, Nevada. Effective remediation requires identification of the actual sources of the contaminants. In Lemmon Valley, the most likely sources of the nitrate are septic tanks and animal corrals. A review of the technical literature indicates that a combination of several different analytes could provide a chemical fingerprint for ground water contaminated by septic-tank effluent. These analytes include stable isotopes of nitrogen, major ions, and consumer-generated organic chemicals (such as chlorofluorocarbons or caffeine). Ground water contaminated by waste from animal corrals may be characterized by stable isotopes and the presence of pharmaceuticals used in the medical treatment of large animals. A combination of chemical analyses will provide the best results in differentiating between sources of nitrogen contamination.

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Section: Chemical Components Of Domestic Sewagementioning

confidence: 99%

Methods for identifying sources of nitrogen contamination of ground water in valleys in Washoe County, Nevada

Seiler¹

1996

Open-File Report

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“…The length of the gravel-packed interval and the length of the annular space around the well casing that is backfilled with drill cuttings can be of higher permeability and can create a vertical connection between permeable zones that were previously isolated from one another by lowpermeability material. 244 316 161 80 3,060 338 262 271 174 280 127 146 234 288 203 180 153 348 82 1980 1981 1982 1983 1984 1985 1986 1987 1988 1976197819801982YEAR 198419861988 The decreasing step-trends in concentrations of chloride and dissolved solids for water samples from the west Carson Valley area suggest that data collected during the early time period (1969)(1970)(1971)(1972)(1973)(1974)(1975)(1976)(1977)(1978) may not represent the same aquifers as data collected during the later time period (1979)(1980)(1981)(1982)(1983)(1984)(1985)(1986)(1987). This is one of the potential problems of not using data collected from an established monitoring network.…”

Section: Detected Trends In Relation To Land Usementioning

confidence: 99%

Trends in chloride, dissolved-solids, and nitrate concentrations in ground water, Carson Valley and Topaz Lake Areas, Douglas County, Nevada, 1959-88

Thodal¹

1996

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“…Ground-water sampling by the USGS in Nevada has, for the most part, been done on a one-time basis in the course of areal Water-resources investigations. Repetitive sampling in a monitoring context has been done only at the Mohave Generating Station in the Colorado River Valley (table 11) Other USGS projects include three that involved documentation of the subsurface transport of contaminants: (1) An ev4luation of the effect of seepage from tailings ponds at Weed Heights in Lyon County (Seitz and others, 1982); (2) an investigation of the potential for transport of radioactive wastes in the unsaturated zone at the low-level Jadioactive-waste-disposal facility at Beatty in Nye County (Nichols, 1986) contamination by effluents from septic tanks at Topaz Lake 1982). Long-term monitoring is not a design function of any of these projects.…”

Section: Us Geological Surveymentioning

confidence: 99%

Ground-water quality in Nevada -- A proposed monitoring program

Nowlin¹

1986

Open-File Report

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A program was designed for the systematic monitoring of groundwater quality in Nevada. Basic hydrologic and water-quality principles are discussed in the formulation of a rational approach to developing a statewide monitoring program. A review of groundwater monitoring efforts in Nevada through 1977 indicates that few requirements for an effective statewide program are being met. A suggested program has been developed that consists of five major elements: (1) A Background-Quality Network to assess the existing water quality in Nevada aquifers, (2) a Contamination Source Inventory of known or potential threats to groundwater quality, (3) Surveillance Networks to monitor groundwater quality in selected hydrographic areas, (4) Intensive Surveys of individual instances of known or potential groundwater contamination, and (5) GroundWater Data File to manage data generated by the other monitoring elements. Two indices have been developed to help assign rational priorities for monitoring ground water in the 255 hydrographic areas of Nevada: (1) A Hydrographic-Area Priority Index for surveillance monitoring, and (2) A Development-Potential Index for background monitoring of areas with little or no current development. Requirements for efficient management of data from groundwater monitoring are discussed and the three major systems containing Nevada groundwater data are reviewed. More than 11,000 chemical analyses of ground water have been acquired from existing systems and incorporated into a prototype data base.

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Ground-water levels and water quality in an area near Topaz Lake, Douglas County, Nevada

Cited by 13 publications

References 0 publications

Methods for identifying sources of nitrogen contamination of ground water in valleys in Washoe County, Nevada

Methods for identifying sources of nitrogen contamination of ground water in valleys in Washoe County, Nevada

Trends in chloride, dissolved-solids, and nitrate concentrations in ground water, Carson Valley and Topaz Lake Areas, Douglas County, Nevada, 1959-88

Ground-water quality in Nevada -- A proposed monitoring program

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