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Metadata
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ID
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F-1-99-NC
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Abstract
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Chief Scientist: Jon Childs. Geophysical data
(Seistecprofiler, groundpenetratingradar) of field activity
F-1-99-NC in Lower Crystal Springs Reservoir from 05/12/1999
to 05/13/1999
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Chief Scientist
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Jon Childs
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Activity Type
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Geophysical
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Platform
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Fast Eddy
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Area of Operation
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Lower Crystal Springs Reservoir
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Location map
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Bounding Coordinates
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37.52310
-122.36612 -122.35659
37.51437
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Dates
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05/12/1999 (JD 132) to 05/13/1999 (JD 133)
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Analog Materials
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No analog holdings.
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Index map
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Crew
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Jon Childs
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Chief Scientist, USGS Western Region
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Pat Hart
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Unspecified, USGS Western Region
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Larry Kooker
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Electrical Technician, USGS Western Region
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Gerry O'Brien
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Driver, USGS Western Region
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Walter Barnhardt
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Unspecified, USGS Western Region
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Diane Minasian
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Unspecified, USGS Western Region
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Equipment Used
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Seistecprofiler
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groundpenetratingradar
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Purpose
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A two-day field activity on Lower Crystal Springs Reservoir
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(the portion of the reservoir north of Highway 92) to test the use of
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the Seistec, a high-resolution surface-towed seismic profiler, and
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ground-penetrating radar in fresh water environments. Permit to
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conduct this survey received from the San Francisco Water Department.
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Summary
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Seistec data (5/12/99) recorded with MudSeis in SEG-Y format. Data were written to hard disk and transferred (ftp) to nemo for ProMax processing. No hard copy or removeable media data were recorded.
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Notes
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Data acquisition: Seistec data (5/12/99) recorded with MudSeis in
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SEG-Y format. Data were written to hard disk and transferred (ftp) to nemo for
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ProMax processing. No hard copy or removeable media data were recorded.
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5/12/99 - Departed MarFac at 0815 (PST) for Crystal Springs; met Mike Byrne,
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Watershead Manager, at the boat ramp off Skyline Blvd, approx. 1/2 mile north of
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Highway 92. Boat inspected and approved for use in the reservoir. Mobilized the
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Seistec instrument, navigational and recording equipment. Launched Fast Eddie
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and Seistec; underway by about 11 am. Starting at noon (1900 GMT) recorded
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seven crossings of the reservoir, observing moderate penetration of sediment
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(15-20 meters) in places, and considerable bathymetric relief. Reservoir has a
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very steep western margin, and several incisions and platforms that may
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represent scarps or other features associated with the San Andreas Fault.
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Seistec acquisition parameters: 105 J power, 0.25 sec fire rate; 16 kHz
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sampling, 80 meter record length, Seistec internal receiver only, 300 Hz - 10=
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kHz bandpass
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5/13/99 - Departed MarFac at 0800 (PST), and arrived Crystal Springs approx.
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0830. Configured a small Zodiac raft to support the ground-penetrating radar
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(GPR) antennas. The GPR was tested in shallow water near the shore at the boat
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ramp, but wind conditions were too severe to launch the whaler and zodiac.
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Further refinement of the GPR deployment is required. Returned to MarFac by
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noon.
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Got Help?
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For F-1-99-NC, we would appreciate any information on -- analog materials, contract, days at sea, dive count, funding, information specialist, information to be derived, kms of navigation, national plan, NGDC Info, organization, owner, ports, project, project number, publications, scanned materials, seismic description, station count, station description, submersible, tabulated info.
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