Soil Water Balance and Recharge Monitoring at the Hanford Site - FY09 Status Report

Rockhold, Mark; Saunders, Danielle L.; Strickland, Christopher E.; Waichler, Scott R.; Clayton, Ray E.

doi:10.2172/992383

Cited by 9 publications

(11 citation statements)

References 31 publications

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“…The WFM data for this site are not reported. As noted by Rockhold et al (2009), the WFMs at this site have not been operating as expected. In addition, the coarse gravel surfaces and lack of vegetation are not representative of conditions above the SWL lysimeter.…”

Section: Integrated Disposal Facility Dune Sitementioning

confidence: 51%

“…The site description material came from a variety of sources, including Rockhold et al (2009), Nichols et al (2008, and Fayer and Keller (2007).…”

Section: Recharge Sites and Monitoring Activities In Fy 2010mentioning

confidence: 99%

“…This section discusses data gaps, project leveraging, and recommendations for existing monitoring sites. Table 5.1 contains a set of previously-identified data gaps related to recharge at the Hanford Site (Rockhold et al 2009;Nichols et al 2008). We reviewed those gaps and identified those that rank higher in importance than the rest.…”

Section: Recharge Strategy For 2011-2015mentioning

confidence: 99%

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Soil Water Balance and Recharge Monitoring at the Hanford Site ? FY 2010 Status Report

Fayer¹,

Saunders²,

Herrington³

et al. 2010

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SummaryThis report summarizes the recharge data collected in FY 2010 at five locations on the Hanford Site in southeastern Washington State. From late fall to early spring of FY 2010, precipitation and temperature conditions did not present an opportunity for increased recharge. The recharge monitoring data confirmed these conditions, showing normal behavior in water content, matric head, and recharge rates. Also provided in this report is a strategy for recharge estimation for the next 5 years.v

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Section: Integrated Disposal Facility Dune Sitementioning

confidence: 51%

“…The site description material came from a variety of sources, including Rockhold et al (2009), Nichols et al (2008, and Fayer and Keller (2007).…”

Section: Recharge Sites and Monitoring Activities In Fy 2010mentioning

confidence: 99%

Section: Recharge Strategy For 2011-2015mentioning

confidence: 99%

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Soil Water Balance and Recharge Monitoring at the Hanford Site ? FY 2010 Status Report

Fayer¹,

Saunders²,

Herrington³

et al. 2010

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“…We employed zero‐flux flow boundary conditions at the lower boundary as it is constrained by the fine‐grained Ringold Formation with a hydraulic conductivity 2 to 3 orders of magnitude lower than that of the Hanford formation. A small recharge rate (55 mm/yr) was applied at the top boundary based on monitoring results at nearby locations [ Rockhold et al ., ].…”

Section: Methodology and Implementationmentioning

confidence: 99%

Application of ensemble-based data assimilation techniques for aquifer characterization using tracer data at Hanford 300 area

et al. 2013

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[1] Subsurface aquifer characterization often involves high parameter dimensionality and requires tremendous computational resources if employing a full Bayesian approach. Ensemble-based data assimilation techniques, including filtering and smoothing, are computationally efficient alternatives. Despite the increasing use of ensemble-based methods in assimilating flow and transport related data for subsurface aquifer characterization, most applications have been limited to synthetic studies or twodimensional problems. In this study, we applied ensemble-based techniques adapted for parameter estimation, including the p-space ensemble Kalman filter and ensemble smoother, for assimilating field tracer experimental data obtained from the Integrated Field Research Challenge (IFRC) site at the Hanford 300 Area. The forward problem was simulated using the massively parallel three-dimensional flow and transport code PFLOTRAN to effectively deal with the highly transient flow boundary conditions at the site and to meet the computational demands of ensemble-based methods. This study demonstrates the effectiveness of ensemble-based methods for characterizing a heterogeneous aquifer by assimilating experimental tracer data, with refined prior information obtained from assimilating other types of data available at the site. It is demonstrated that high-performance computing enables the use of increasingly mechanistic nonlinear forward simulations for a complex system within the data assimilation framework with reasonable turnaround time.Citation: Chen, X., G. E. Hammond, C. J. Murray, M. L. Rockhold, V. R. Vermeul, and J. M. Zachara (2013), Application of ensemble-based data assimilation techniques for aquifer characterization using tracer data at Hanford 300 area, Water Resour. Res., 49,[7064][7065][7066][7067][7068][7069][7070][7071][7072][7073][7074][7075][7076]

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“…We employed no‐flux boundary conditions for the top and bottom boundaries, as the recharge at the top was relatively small [ Rockhold et al , 2009] and the bottom of the modeling domain was constrained by the fine‐grained Ringold formation. Initial flow conditions were specified as hydrostatic head corresponding to a water table at 105 m.…”

Section: Methodsmentioning

confidence: 99%

Three‐dimensional Bayesian geostatistical aquifer characterization at the Hanford 300 Area using tracer test data

Chen

Murakami

Hahn

et al. 2012

Water Resources Research

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1] Tracer tests performed under natural or forced gradient flow conditions can provide useful information for characterizing subsurface properties, through monitoring, modeling, and interpretation of the tracer plume migration in an aquifer. Nonreactive tracer experiments were conducted at the Hanford 300 Area, along with constant-rate injection tests and electromagnetic borehole flowmeter tests. A Bayesian data assimilation technique, the method of anchored distributions (MAD) , was applied to assimilate the experimental tracer test data with the other types of data and to infer the threedimensional heterogeneous structure of the hydraulic conductivity in the saturated zone of the Hanford formation.In this study, the Bayesian prior information on the underlying random hydraulic conductivity field was obtained from previous field characterization efforts using constant-rate injection and borehole flowmeter test data. The posterior distribution of the conductivity field was obtained by further conditioning the field on the temporal moments of tracer breakthrough curves at various observation wells. MAD was implemented with the massively parallel three-dimensional flow and transport code PFLOTRAN to cope with the highly transient flow boundary conditions at the site and to meet the computational demands of MAD. A synthetic study proved that the proposed method could effectively invert tracer test data to capture the essential spatial heterogeneity of the three-dimensional hydraulic conductivity field. Application of MAD to actual field tracer data at the Hanford 300 Area demonstrates that inverting for spatial heterogeneity of hydraulic conductivity under transient flow conditions is challenging and more work is needed.Citation: Chen, X., H. Murakami, M. S. Hahn, G. E. Hammond, M. L. Rockhold, J. M. Zachara, and Y. Rubin (2012), Threedimensional Bayesian geostatistical aquifer characterization at the Hanford 300 Area using tracer test data, Water Resour. Res., 48, W06501,

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Soil Water Balance and Recharge Monitoring at the Hanford Site - FY09 Status Report

Cited by 9 publications

References 31 publications

Soil Water Balance and Recharge Monitoring at the Hanford Site ? FY 2010 Status Report

Soil Water Balance and Recharge Monitoring at the Hanford Site ? FY 2010 Status Report

Application of ensemble-based data assimilation techniques for aquifer characterization using tracer data at Hanford 300 area

Three‐dimensional Bayesian geostatistical aquifer characterization at the Hanford 300 Area using tracer test data

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