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ID
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N-1-76-SC
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Also Known As
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SEDYNEX_1
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Abstract
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Chief Scientists: Dave Cacchione, Dave Drake. Geophysical
data (Geoprobe, currentmeter, pressuresensor,
underwatertelevision, thermistor, temperature,
opticalbackscattersensor, waterbucket, wavepressure,
remoteopticalsensor, ADP, dyedsand, barometer) of field
activity N-1-76-SC in One mile offshore of Mission Beach, San
Diego, California from 07/20/1976 to 07/30/1976
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Project/Theme
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Sediment Dynamics Experiment
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Chief Scientist
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Dave Cacchione
Dave Drake
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Activity Type
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Geophysical
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Platform
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NUC Tower
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Area of Operation
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One mile offshore of Mission Beach, San Diego, California, Southern California
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Bounding Coordinates
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34.75000
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-122.75000 -116.75000 |
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32.25000 |
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Dates
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07/20/1976 (JD 202) to 07/30/1976 (JD 212)
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Analog Materials
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list
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Crew
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Dave Cacchione
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Chief Scientist, USGS Western Region
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Dave Drake
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Chief Scientist, USGS Western Region
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John Dingler
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Associate Investigator, USGS Western Region
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Francis P. Shepard
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Associate Investigator, Scripps Institution Of Oceanography
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Clinton Winant
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Associate Investigator, Scripps Institution Of Oceanography
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Dale Good
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Associate Investigator, Naval Undersea Center
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Jack Olson
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Associate Investigator, Naval Undersea Center
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Paul Hanson
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Associate Investigator, Naval Undersea Center
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Equipment Used
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Geoprobe
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currentmeter
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pressuresensor
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underwatertelevision
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thermistor
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temperature
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opticalbackscattersensor
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waterbucket
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wavepressure
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remoteopticalsensor
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ADP
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dyedsand
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barometer
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Purpose
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1. To investigate the dynamic relationships between the suspended and
bottom sediment and the near-bottom flow field over a period of about one week
at a specific site on the inner continental shelf off southern California.
2. Tests and evaluation of the operational performance, handling and utility of
the Geoprobe station in the offshore zone.
3. Comparison of the performance characteristics of the current meters and
pressure sensor with that of other electromagnetic current meters and pressure
sensors.
4. Analysis of the time-dependent vertical distribution, chemical composition,
and hydraulic properties of suspended materials in the water column at the
experimental site.
5. Correlation of the movement of bottom and suspended sediment with the
dominant hydrodynamic mechanisms driving the near-bottom flow field. In
particular, an evaluation will be made of the effectiveness of shoaling internal
waves in producing sediment transport.
6. Measurements of current velocity and water temperature at several locations
near the sea floor to provide information on bottom boundary layer processes and
their role in producing sediment movement.
7. Correlation of the size and migration rate of the small scale bedforms with
the near-bottom flow field.
8. Grain size and mineralogic analyses of the sediments from selected sites
between the beach and the outer instrument packages.
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Information to be Derived
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Surface wave currents and pressure; Internal waves currents
and temperature; Surface tide currents and pressure; Wind-driven
currents; Bottom sediment size, composition, and photos; Suspended
sediment size and composition; Wind speed; Wind direction;
Air pressure; Surface water temperature
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Notes
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Personnel from USGS, SIO, and NUC. Naval Undersea Center Tower.
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Got Help?
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For N-1-76-SC, we would appreciate any information on -- contract, days at sea, dive count, funding, information specialist, kms of navigation, national plan, NGDC Info, organization, owner, ports, project number, publications, scanned materials, seismic description, station count, station description, submersible, summary, tabulated info.
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