Hydrology of area 54, northern Great Plains, and Rocky Mountain coal provinces, Colorado and Wyoming

Kühn, Gerhard; Daddow, P.D.; Craig, G.S.

doi:10.3133/ofr83146

Cited by 6 publications

(6 citation statements)

References 8 publications

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“…Annual precipitation in the area is typically 50-64 cm, with most falling as snow during the months October-May (Khun et al, 1983). Snowmelt occurs primarily in May-June and is the primary source of water to the area.…”

Section: Physical Settingmentioning

confidence: 99%

Uranium delivery and uptake in a montane wetland, north-central Colorado, USA

Schumann

Zielinski

Otton

et al. 2017

Applied Geochemistry

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Comprehensive sampling of peat, underlying lakebed sediments, and coexisting waters of a naturally uraniferous montane wetland are combined with hydrologic measurements to define the important controls on uranium (U) supply and uptake. The major source of U to the wetland is groundwater flowing through locally fractured and faulted granite gneiss of Proterozoic age. Dissolved U concentrations in four springs and one seep ranged from 20 to 83 ppb (µg/l). Maximum U concentrations are ~300 ppm (mg/kg) in lakebed sediments and >3000 ppm in peat. Uranium in lakebed sediments is primarily stratabound in the more organic-rich layers, but samples of similar organic content display variable U concentrations. Post-depositional modifications include variable additions of U delivered by groundwater. Uranium distribution in peat is heterogeneous and primarily controlled by proximity to groundwater-fed springs and seeps that act as local point sources of U, and by proximity to groundwater directed along the peat/lakebeds contact. Uranium is initially sorbed on various organic components of peat as oxidized U(VI) present in groundwater. Selective extractions indicate that the majority of sorbed U remains as the oxidized species despite reducing conditions that should favor formation of U(IV). Possible explanations are kinetic hindrances related to strong complex formation between uranyl and humic substances, inhibition of anaerobic bacterial activity by low supply of dissolved iron and sulfate, and by cold temperatures.

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Section: Physical Settingmentioning

confidence: 99%

Uranium delivery and uptake in a montane wetland, north-central Colorado, USA

Schumann

Zielinski

Otton

et al. 2017

Applied Geochemistry

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“…Load. The amount, by mass or volume, of a substance transported by a stream past a specific point (Kuhn and others, 1983). Maximum depth.…”

Section: Descriptionmentioning

confidence: 99%

Hydrology and water quality of Wind Lake in southeastern Wisconsin

Field¹

1993

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“…(Bates and Jackson, 1980) Benthic invertebrate An animal without a backbone, living on or near the bottom of an aquatic environment. (Kuhn and others, 1983) Benthos, benthic zone Organisms living in or on the bottom of an aquatic environment. The bottom of a lake or stream.…”

Section: Glossary Of Technical Termsmentioning

confidence: 99%

Hydrology and water quality of Delavan Lake in southeastern Wisconsin

Field¹,

Duerk²

1988

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Delavan Lake is a eutrophic, recreational lake in a densely populated area of southeastern Wisconsin. Sewage effluent and septic tank drainage were diverted out of the drainage basin of the lake to improve its water quality in 1981. The worst known blue-green algal bloom occurred in the lake in the summer of 1983. A comprehensive hydrologic and water-quality investigation was started in October 1983 to determine why the water quality in the lake apparently had not improved after cessation of influxes of waste waters. This report describes the hydrology and water quality of Delavan Lake and its drainage basin during the 1984 and 1985 water years. All major external inputs and outputs of phosphorus and nitrogen to the lake were measured to assess the importance of each source. Internal loading of phosphorus was calculated as a residual of a mass-balance budget. The in-lake phosphorus mass during the 2-year study shows a gradual declining trend that suggests an improving lake condition but also could be due to a random phosphorus decline. Future monitoring will be needed to determine whether the decline in phosphorus has indeed occurred as a result of waste-water diversion. Continuous streamflow and water-quality monitoring in the subbasins of the Delavan Lake watershed showed a wide range of annual phosphorus and nitrogen yields during the study. Jackson Creek tributary, which predominantly drains the city of Elkhorn, had the highest average yields of phosphorus (838 pounds per square mile) and Kjeldahl nitrogen (3,600 pounds per square mile). These yields were almost three times those found in the Jackson Creek basin, which has the largest livestock population. The other major tributary, Delavan Lake tributary 2, had much lower average annual yields of phosphorus (53.1 pounds per square mile) and Kjeldahl nitrogen (550 pounds per square mile). The lower yields in this tributary result from significantly reduced runoff caused by storage and evapotranspiration in a large pond that is surrounded by a wetland in the stream's basin. External loading of phosphorus and nitrogen were sufficient to cause eutrophic conditions. Internal loading of phosphorus was more than two times the external phosphorus supply. Most of the internal loading occurred when the hypolimnion was anoxic during summer. Internal loading of phosphorus during the 1985 water year was significantly reduced from that of 1984 because of a shorter anoxic period. valuable assistance in collection of and analysis of the data for this study. His efforts in assuring that data were collected during a variety of adverse conditions were an important part in establishing the excellent data base for this study. His contributions to water-resources studies in Wisconsin will be sorely missed in the future.

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Hydrology of area 54, northern Great Plains, and Rocky Mountain coal provinces, Colorado and Wyoming

Cited by 6 publications

References 8 publications

Uranium delivery and uptake in a montane wetland, north-central Colorado, USA

Uranium delivery and uptake in a montane wetland, north-central Colorado, USA

Hydrology and water quality of Wind Lake in southeastern Wisconsin

Hydrology and water quality of Delavan Lake in southeastern Wisconsin

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