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Metadata
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ID
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06015
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Also Known As
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06015
A-1-06-GM
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Abstract
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United States Geological Survey, Woods Hole, Massachusetts.
Chief Scientist: David Twichell. Data (Submetrix bathymetry,
Klein Sidescan sonar, Chirp subbottom profiler (512i), DGPS
navigation, Navigation-Hypack) of field activity 06015
(A-1-06-GM) in Chandeleur Islands, Louisiana, United States,
Gulf of Mexico,North America, North Atlantic from 07/06/2006
to 07/18/2006
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Organization
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United States Geological Survey, Woods Hole, Massachusetts
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Project/Theme
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Chandeleur Island Mapping
Coastal Change Hazards
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Chief Scientist
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David Twichell
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Platform
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Acadiana
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Area of Operation
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Chandeleur Islands, Louisiana, United States, Gulf of Mexico,
North America, North Atlantic
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Location map
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Bounding Coordinates
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30.13333
-88.91667 -88.73333
29.73333
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Ports
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LEAVE Biloxi, MS
ARRIVE Biloxi, MS
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Dates
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07/06/2006 (JD 187) to 07/18/2006 (JD 199)
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Analog Materials
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No analog holdings.
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Index map
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Information Specialist
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Crew
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David Twichell
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Chief Scientist
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Charles Worley - electronics technician
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Emile Bergeron -
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electronics technician
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Wayne Baldwin - scientist
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data archivist;
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David Twichell - chief scientist
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Joseph Malbrough
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Equipment Used
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Submetrix bathymetry
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Klein Sidescan sonar
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Chirp subbottom profiler
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((512i))
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DGPS navigation
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Navigation-Hypack
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Purpose
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The objectives of this cruise were to map the seafloor and
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shallow stratigraphy along the offshore side of the Chandeleur
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Islands off the eastern side of the Mississippi delta. This survey
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was done in collaboration with the USGS (St. Petersburg) and the
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Univ. of New Orleans who conducted geophysical surveys closer to
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shore than could be reached aboard the ACADIANA and along the back
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of the Chandeleur Islands. The reason for the mapping was to assess
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the effect of Hurricane Katrina oon the seafloor surrounding these
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islands.
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Information to be Derived
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Sea Floor Map;Bathymetric Maps;Morphology;
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Summary
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The Chandeleur Islands were severely damaged by Hurricanes
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Katrina and Rita, and the goal of this cruise was to map the inner
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shelf offshore of the northern part of the island chain to assess
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the impact of these hurricanes on the inner shelf. The survey
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covered an area approximately 5 km wide by 46 km long that sharted
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in water depths as shallow as 4.5m and ended in water depths
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reaching 16 m. A series of shore parrallel lines spaced
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approximately 150 m apart were complimented with a set of
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on-offshore lines spaced about 1 km apart. Sidescan sonar imagery,
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interferometric bathymetry and Chirp subbottom profiles were
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collected along all survey lines. The shore-parallel lines were
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spaced to provide continuous sidescan sonar coverage, and about 50%
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bathymetric coverage. All data were logged digitally, and were
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archived to DVD-ROM prior to the end of the cruise. Geophysical and
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navigation data were collected along 1877 km of survey lines.
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Notes
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Navigation technique: GPS.
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11 days at sea.
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1877 km kms. of continuous data.
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no stations occupied.
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Funding
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USGS Katrina Supplemental funds
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Got Help?
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For 06015, we would appreciate any information on -- activity type, analog materials, contract, days at sea, dive count, kms of navigation, national plan, NGDC Info, owner, project number, publications, scanned materials, seismic description, station count, station description, submersible, tabulated info.
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