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Seismic data for study of shallow mountain bedrock limits seepage-based headwater climate refugia, Shenandoah National Park, Virginia

Dates

Time Period
2015-09-15
Time Period
2015-12-03
Release Date
2017
Publication Date

Citation

M.A. Briggs, J.W. Lane, Jr., C.D. Snyder, E.A. White, Z.C. Johnson, D.L. Nelms, and N.P. Hitt, 2017, Seismic data for study of shallow mountain bedrock limits seepage-based headwater climate refugia, Shenandoah National Park, Virginia: U.S. Geological Survey data release, https://doi.org/10.5066/F7JW8C04.

Summary

A combination of long-term daily temperature records and depth to bedrock measurements were used to parametrize one-dimensional models of shallow aquifer vertical heat transport in Shenandoah National Park, VA, USA. Depth to bedrock can directly influence shallow aquifer flow and thermal sensitivity, but is typically ill-defined along the stream corridor in steep mountain catchments. We employed rapid, cost-effective passive seismic measurements to evaluate the variable thickness of the shallow colluvial and alluvial aquifer sediments along a headwater stream supporting coldwater-dependent brook trout (Salvelinus fontinalis) in Shenandoah National Park. The methods are fully documented in the associated journal article, Briggs, M.A., [...]

Contacts

Attached Files

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HVSR.zip 27.02 MB
REFRACTION.zip 2.61 MB
Briggs2017_Limnologica_seismic_data.jpg thumbnail 145.53 KB
README.txt 5.04 KB
briggs2017_Limnologica_seismic_data.xml
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Purpose

In September and December 2015, horizontal -to-vertical spectral ratio (HVSR) measurements were acquired at over 50 stations within Whiteoak Canyon using MOHO Tromino Model TEP-3C three-component seismometers to assess depth to bedrock. The HVSR method requires a measurement or estimate of shear wave velocity, which depends on sediment composition and density, for the conversion of measured resonance frequency to a depth to bedrock. Here we measured shear wave velocity directly using an active seismic technique with multiple horizontal shear-wave seismic sources recorded by a linear 24-channel seismic geophone array. This estimated shear-wave velocity was validated at an HVSR mearsurement site collocated with a riparian well with known depth to bedrock along the upper section of Whiteoak Canyon.

Rights

Public Domain

Additional Information

Identifiers

Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/F7JW8C04

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