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

Kisa Mwakanyamale, Lee Slater, Frederick Day-Lewis, Mehrez Elwaseif, Carole Johnson

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

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 groundwater-surface 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 (≥2d) of the complex dam operations driving stage fluctuations and hence groundwater-surface water exchange at the 300-Area.

Original languageEnglish (US)
Article numberL06401
JournalGeophysical Research Letters
Volume39
Issue number6
DOIs
StatePublished - Mar 28 2012

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groundwater-surface water interaction
frequency analysis
ground water
surface water
rivers
fiber optics
water exchange
groundwater
temperature
interactions
river
Columbia (Orbiter)
dams
water temperature
aquifers
qualitative analysis
pollutant transport
correlation coefficients
quantitative analysis
uranium

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

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Spatially variable stage-driven groundwater-surface water interaction inferred from time-frequency analysis of distributed temperature sensing data. / Mwakanyamale, Kisa; Slater, Lee; Day-Lewis, Frederick; Elwaseif, Mehrez; Johnson, Carole.

In: Geophysical Research Letters, Vol. 39, No. 6, L06401, 28.03.2012.

Research output: Contribution to journalArticle

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AU - Mwakanyamale, Kisa

AU - Slater, Lee

AU - Day-Lewis, Frederick

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AU - Johnson, Carole

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AB - 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 groundwater-surface 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 (≥2d) of the complex dam operations driving stage fluctuations and hence groundwater-surface water exchange at the 300-Area.

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