A review of non-invasive imaging methods and applications in contaminant hydrogeology research

Werth, Charles J.; Zhang, Changyong; Brusseau, Mark L.; Oostrom, Mart; Baumann, Thomas

doi:10.1016/j.jconhyd.2010.01.001

Cited by 180 publications

(121 citation statements)

References 249 publications

(367 reference statements)

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“…This finding is contrary to the behavior typically observed both in numerical simulations and lab scale aquifer cell experiments that have quantified the DNAPL source zone saturation (Christ et al, 2006;Phelan and Abriola, 2006;Brusseau et al, 2008;DiFilippo et al, 2010;DiFilippo and Brusseau, 2011). Although the preferential depletion of ganglia has been observed, leaving only high saturation pools in the source zone, solubilization studies using high resolution magnetic resonance imaging (MRI) techniques have found that the gradual dissolution of pooled regions from heterogeneous source zones can result in the formation of ganglia once a certain volume of the DNAPL pool has dissolved (Zhang et al, 2007;Zhang et al, 2008;Werth et al, 2010). In effect, regions containing high-saturation DNAPL pools are converted to ganglia-dominated zones as the source zone mass is depleted, rather than remaining as highsaturation pools until complete DNAPL mass removal occurs.…”

Section: Results Of Source Zone Mass Removal From Multicomponent Hetementioning

confidence: 99%

Metric Identification and Protocol Development for Characterizing DNAPL Source Zone Architecture and Associated Plume Response

Abriola¹,

Miller²,

Pennell³

et al. 2013

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)2. REPORT TYPE SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION / AVAILABILITY STATEMENT SUPPLEMENTARY NOTES ABSTRACTThe overarching goal of this research is to develop and demonstrate a comprehensive approach for field characterization of DNAPL source zones which quantifies the key features that control plume response. Here the intent is to integrate targeted (local-scale) in situ tests with transect-based observations of downstream contaminant flux or concentration and information on subsurface geologic variability. To address its primary goal, the research encompasses the following specific objectives: (1) identification of the most information rich metrics for linking NAPL architecture to plume response; (2) development and refinement of in situ test methods and modeling tools that can be used to quantify identified metrics in targeted regions of the source zone; (3) integration of these metrics and tools with current machine learning characterization methods for an overall source zone assessment protocol; and (4) development of simplified models for prediction of plume response. The research approach integrates batch, column and aquifer cell experiments with mathematical modeling and data processing tools to identify and quantify features of the DNAPL architecture controlling down gradient plume response. SUBJECT TERMSField characterization; Metric identification; DNAPL; SECURITY CLASSIFICATION OF:No classified information

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Section: Results Of Source Zone Mass Removal From Multicomponent Hetementioning

confidence: 99%

Metric Identification and Protocol Development for Characterizing DNAPL Source Zone Architecture and Associated Plume Response

Abriola¹,

Miller²,

Pennell³

et al. 2013

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“…In their work, they demonstrate the capability of the MRV method to capture temporally averaged three-dimensional flow fields in porous structures with a resolution as high as 0.6 mm. An overview of gamma radiation, X-ray microtomography, and magnetic resonance imaging including advantages, disadvantages, and applications is given by Werth et al (2010). However, all these non-optical methods are not able to record temporally resolved flow fields, and hence, turbulent statistics cannot be accomplished.…”

Section: Literature Reviewmentioning

confidence: 99%

Particle image velocimetry in a foam-like porous structure using refractive index matching: a method to characterize the hydrodynamic performance of porous structures

et al. 2012

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We present a method to measure two-dimensional velocity fields inside an artificial foam-like porous structure using particle image velocimetry and a refractive index matching technique to avoid optical distortion. The porous structure is manufactured by stereolithography with the epoxy resin WaterShed Ò XC 11122 as solid material, and anisole is used as refractive index-matched fluid. It was found that the direction of build-up of the stereolithographic structure plays an important role for the quality of the recorded images. The velocity fields measured in this study and the turbulent statistics derived thereof allow to characterize the hydrodynamic performance of the artificial foam-like structure and clarify the mechanisms of mixing. Results from this study compare well to results from a large eddy simulation reported by Hutter et al. (Chem Eng Sci 66:519-529, 2011b) and hence reinforce these simulations.

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“…Several noninvasive imaging techniques have been developed that allow direct or spectroscopic observation of pore-scale processes within the laboratory framework. Werth et al (2010) prepared a comprehensive review of the merits of these approaches as they apply to contaminant hydrogeology. One approach, optical imaging using ultraviolet (UV) or visual light in twodimensional (2D) model pore structures, which are etched into different substrates with transparent cover, affords many benefits, such as ease of fabrication, low cost, and fast acquisition times (Werth et al 2010).…”

Section: Pore-scale Flow and Transportmentioning

confidence: 99%

EMSL Pore Scale Modeling Challenge/Workshop

Hess¹,

Oostrom²,

Celia³

et al. 2011

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The design and implementation of cost-effective remediation strategies for subsurface contamination not only relies on descriptive models of contaminant distribution but predictive models of contaminant fate and transport. The development of such predictive models is of great importance to many government agencies including the Department of Energy (DOE), Department of Defense, and the Environmental Protection Agency. Accurate prediction of the fate and transport of environmental contaminants in the subsurface has driven development of increasingly sophisticated subsurface flow and transport models. Even without considering spatial and temporal scalability, contaminant transport at the field scale is complex, and this almost inevitably results in an especially sophisticated model being developed for a specific field site. Unfortunately, these models are not easily generalizable to other field sites or and can only be used by the model authors to generate meaningful results. Over time, this results in the existence of numerous specialized models that are not readily comparable to each other and difficult to cross-validate. There is a lack of fundamental experimental observations at the pore scale that can be used to support model development and validation at the field scale.

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A review of non-invasive imaging methods and applications in contaminant hydrogeology research

Cited by 180 publications

References 249 publications

Metric Identification and Protocol Development for Characterizing DNAPL Source Zone Architecture and Associated Plume Response

Metric Identification and Protocol Development for Characterizing DNAPL Source Zone Architecture and Associated Plume Response

Particle image velocimetry in a foam-like porous structure using refractive index matching: a method to characterize the hydrodynamic performance of porous structures

EMSL Pore Scale Modeling Challenge/Workshop

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