Geohydrology and ground-water quality beneath the 300 Area, Hanford Site, Washington

Lindberg, Jonathan W.; Bond, F.W.

doi:10.2172/6135014

Cited by 39 publications

(69 citation statements)

References 8 publications

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“…The brief discussion that follows highlights the similarities and differences in the geologic and hydrogeologic properties of these geologic layers, ordered from oldest to youngest. The information presented is a summary from previous reports (e.g., Lindberg and Bond 1979;Schalla et al 1988;Gaylord and Poeter 1991;Swanson et al 1992;Thorne et al 1993;Lindsey 1995) and recent reports (Williams et al 2007). …”

Section: Geologic Setting Of the 300 Areamentioning

confidence: 99%

“…Gaylord and Poeter (1991) report that the Hanford formation is generally coarser grained (larger gravels), less cemented and compacted, and does not have extensive fine-grained lithofacies as compared to the Ringold Formation. Previous and ongoing studies have concentrated on defining the two and three-dimensional surface of the Ringold contact in the 300 Area, including the area in the immediate vicinity of the Columbia River shoreline (e.g., Lindberg and Bond 1979;Schalla et al 1988;Gaylord and Poeter 1991;Swanson et al 1992;Thorne et al 1993;Lindsey 1995;Williams et al 2007). …”

Section: Observations and Measurements Of The Ringold Contactmentioning

confidence: 99%

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Investigation of the Hyporheic Zone at the 300 Area,Hanford Site

Fritz¹,

Kohn²,

Gilmore³

et al. 2007

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SummaryAt the Hanford Site in southeastern Washington State, contaminated groundwater discharges to the Columbia River after passing through a zone of groundwater/river water interaction at the shoreline (i.e., the hyporheic zone). In the hyporheic zone, river water may infiltrate the riverbank during periods of high-river stage and mix with the approaching groundwater. Contaminants carried by groundwater may become diluted by the infiltrating river water, thus reducing concentrations at locations of exposure, such as riverbank springs and upwelling through the riverbed. There have been limited studies of contaminant concentrations, physical properties, or the extent of the hyporheic zone near the Hanford Site's 300 Area, yet this zone is a major interface for discharge of groundwater contamination into the Columbia River.The Remediation Task of the Remediation and Closure Science Project conducts research to meet several objectives concerning the discharge of groundwater contamination into the river at the 300 Area of the Hanford Site in Washington State. This report documents research conducted to meet these objectives by developing baseline data for future evaluation of remedial technologies, evaluating the effects of changing river stage on near-shore groundwater chemistry, improving estimates of contaminant flux to the river, providing estimates on the extent of contaminant discharge areas along the shoreline, and providing data to support computer models used to evaluate remedial alternatives. This report summarizes the activities conducted to date, and provides an overview of data collected through July 2006. Recent geologic investigations (funded through other U.S. Department of Energy [DOE] projects)have provided a more complete geologic interpretation of the 300 Area and a characterization of the vertical extent of uranium contamination. Extrapolation of this geologic interpretation into the hyporheic zone is possible, but little data are available to provide corroboration. Penetration testing was conducted along the shoreline to develop evidence to support the extrapolation of the mapping of the geologic facies. While this penetration testing provided evidence supporting the extrapolation of the most recent geologic interpretation, it also provided some higher-resolution detail on the shape of the layer that constrains contaminant movement. Information on this confining layer will provide a more-detailed estimate of the area of riverbed that has the potential to be impacted by uranium discharge to the river from groundwater transport.Water sampling in the hyporheic zone has provided results that illustrate the degree of mixing that occurs in the hyporheic zone. Uranium concentrations measured at individual sampling locations can vary by several orders of magnitude depending on the Columbia River and near-shore aquifer elevations. This report shows that the concentrations of all the measured constituents in water samples collected from the hyporheic zone vary according to the ratio of groundwater and C...

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Section: Geologic Setting Of the 300 Areamentioning

confidence: 99%

Section: Observations and Measurements Of The Ringold Contactmentioning

confidence: 99%

Investigation of the Hyporheic Zone at the 300 Area,Hanford Site

Fritz¹,

Kohn²,

Gilmore³

et al. 2007

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“…The Ringold Formation is divided into gravel dominated (upper) and mud dominated (lower) units [Newcomb, 1958]. The upper unit consists of cemented and compacted quartzitic gravels with mica rich silt and fine sand matrix [Lindberg and Bond, 1979] with hydraulic conductivity of 40-120 m/d [Williams et al, 2007]. The lower unit has hydraulic conductivity of $1 m/d [Williams et al, 2007] and consists of silty-clay to silty-sand sediments [Tyler, 1992].…”

Section: Field Sitementioning

confidence: 99%

“…controlled by dam operations upstream of the 300-Area [Lindberg and Bond, 1979] impose a complex flow head boundary condition, regulating groundwater exchange and presumably influencing uranium transport via these seeps.…”

Section: Field Sitementioning

confidence: 99%

Spatially variable stage‐driven groundwater‐surface water interaction inferred from time‐frequency analysis of distributed temperature sensing data

Mwakanyamale

Slater

Day‐Lewis

et al. 2012

Geophysical Research Letters

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[1] Characterization of groundwater-surface water exchange is essential for improving understanding of contaminant transport between aquifers and rivers. Fiber-optic distributed temperature sensing (FODTS) provides rich spatiotemporal datasets for quantitative and qualitative analysis of groundwatersurface water exchange. We demonstrate how time-frequency analysis of FODTS and synchronous river stage time series from the Columbia River adjacent to the Hanford 300-Area, Richland, Washington, provides spatial information on the strength of stage-driven exchange of uranium contaminated groundwater in response to subsurface heterogeneity. Although used in previous studies, the stage-temperature correlation coefficient proved an unreliable indicator of the stage-driven forcing on groundwater discharge in the presence of other factors influencing river water temperature. In contrast, S-transform analysis of the stage and FODTS data definitively identifies the spatial distribution of discharge zones and provided information on the dominant forcing periods (≥2 d) of the complex dam operations driving stage fluctuations and hence groundwater-surface water exchange at the 300-Area. Citation: Mwakanyamale, K., L. Slater, F. DayLewis, M. Elwaseif, and C. Johnson (2012), Spatially variable stage-driven groundwater-surface water interaction inferred from time-frequency analysis of distributed temperature sensing data, Geophys. Res. Lett., 39, L06401,

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“…More detailed discussions of these subjects are found in Lindberg and Bond (1979); Schalla et al (1988b);Delaney et al (1991); Gaylord and Poeter (1991);and Swanson et al (1992).…”

Section: Geologymentioning

confidence: 99%

300 Area Process Trenches Groundwater Monitoring Plan

Lindberg¹,

Chou²

2001

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Geohydrology and ground-water quality beneath the 300 Area, Hanford Site, Washington

Cited by 39 publications

References 8 publications

Investigation of the Hyporheic Zone at the 300 Area,Hanford Site

Investigation of the Hyporheic Zone at the 300 Area,Hanford Site

Spatially variable stage‐driven groundwater‐surface water interaction inferred from time‐frequency analysis of distributed temperature sensing data

300 Area Process Trenches Groundwater Monitoring Plan

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