Vertical electrical sounding (VES) geophysical data collected in the Scott M. Matheson Wetlands Preserve near Moab, Utah
Dates
Publication Date
2018-11-30
Start Date
2015-03-31
End Date
2015-04-02
Citation
Briggs, M.A., Nelson, N.C., Gardner, P.M., and Lane, J.W., 2018, Electrical geophysical data collected in the Scott M. Matheson Wetlands Preserve near Moab, Utah: U.S. Geological Survey data release, https://doi.org/10.5066/F75M63ZF.
Summary
Vertical electrical soundings (VES) are used to develop depth-resolved models of aquifer resistivity by making electrical potential measurements at increasingly larger electrode spacing, with the array centered around a common point. Variations in modeled electrical resistivity with depth can be used to infer groundwater salinity and preferential fresh groundwater flow zones. Each of the 4 VES measurement integrates approximately 11 individual electrical soundings with 4 electrodes driven into the soil in a linear Wenner array with electrode spacings ranging from 1 to 40 m. Data were collected manually with a SuperSting electrical resistivity meter (AGI - Advanced Geosciences, Inc) and recorded by hand in a field book.
Summary
Vertical electrical soundings (VES) are used to develop depth-resolved models of aquifer resistivity by making electrical potential measurements at increasingly larger electrode spacing, with the array centered around a common point. Variations in modeled electrical resistivity with depth can be used to infer groundwater salinity and preferential fresh groundwater flow zones. Each of the 4 VES measurement integrates approximately 11 individual electrical soundings with 4 electrodes driven into the soil in a linear Wenner array with electrode spacings ranging from 1 to 40 m. Data were collected manually with a SuperSting electrical resistivity meter (AGI - Advanced Geosciences, Inc) and recorded by hand in a field book.
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Metadata_VES.xml Original FGDC Metadata
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Purpose
For this study, n=4 VES measurements were collected in support of larger-scale electromagnetic induction imaging (EMI) geophysical data described in another section of this data release. Although they are more time consuming to collect, VES measurements are made in direct contact with the land surface and may therefore provide more extensive (compared to EMI) information regarding depth-specific layering of bulk electrical conductivity to approximate 25 m depth using the electrode configuration utilized here. Ultimately these data were collected to infer discharge flowpaths of relatively fresh groundwater to the Colorado River that are embedded in natural brine groundwater.