| Freeze Core Sampling to Validate Time-Lapse Resistivity Monitoring of the Hyporheic Zone. | |
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MedLine Citation:
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PMID: 23036232 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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A freeze core sampler was used to characterize hyporheic zone storage during a stream tracer test. The pore water from the frozen core showed tracer lingered in the hyporheic zone after the tracer had returned to background concentration in collocated well samples. These results confirmed evidence of lingering subsurface tracer seen in time-lapse electrical resistivity tomographs. The pore water exhibited brine exclusion (ion concentrations in ice lower than source water) in a sediment matrix, despite the fast freezing time. Although freeze core sampling provided qualitative evidence of lingering tracer, it proved difficult to quantify tracer concentration because the amount of brine exclusion during freezing could not be accurately determined. Nonetheless, the additional evidence for lingering tracer supports using time-lapse resistivity to detect regions of low fluid mobility within the hyporheic zone that can act as chemically reactive zones of importance in stream health. |
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Authors:
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Laura Toran; Brian Hughes; Jonathan Nyquist; Robert Ryan |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-10-4 |
Journal Detail:
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Title: Ground water Volume: - ISSN: 1745-6584 ISO Abbreviation: Ground Water Publication Date: 2012 Oct |
Date Detail:
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Created Date: 2012-10-5 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9882886 Medline TA: Ground Water Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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© 2012, The Author(s). Ground Water © 2012, National Ground Water Association. |
Affiliation:
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Department of Earth and Environmental Science, Temple University, Philadelphia, PA 19122. Department of Civil and Environmental Engineering, Temple University, Philadelphia, PA 19122. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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