Field Activity 2006-015-FA

Identifier 2006-015-FA
Purpose The objectives of this cruise were to map the sea floor and shallow stratigraphy along the offshore side of the Chandeleur Islands off the eastern side of the Mississippi delta. This survey was done in collaboration with the USGS (St. Petersburg) and the Univ. of New Orleans who conducted geophysical surveys closer to shore than could be reached aboard the ACADIANA and along the back of the Chandeleur Islands. The reason for the mapping was to assess the effect of Hurricane Katrina on the sea floor surrounding these islands.
Location Chandeleur Islands, Chandeleur Sound, Louisiana, United States, Gulf of Mexico, North America, North Atlantic;
Summary The Chandeleur Islands were severely damaged by Hurricanes Katrina and Rita, and the goal of this cruise was to map the inner shelf offshore of the northern part of the island chain to assess the impact of these hurricanes on the inner shelf. The survey covered an area approximately 5 km wide by 46 km long that started in water depths as shallow as 4.5 m and ended in water depths reaching 16 m. A series of shore parallel lines spaced approximately 150 m apart were complimented with a set of on/offshore lines spaced about 1 km apart. Sidescan sonar imagery, interferometric bathymetry and Chirp sub-bottom profiles were collected along all survey lines. The shore-parallel lines were spaced to provide continuous sidescan sonar coverage, and about 50% bathymetric coverage. All data were logged digitally and were archived to DVD-ROM prior to the end of the cruise. Geophysical and navigation data were collected along 1877 km of survey lines.
Info derived Sea floor map; Bathymetric maps; Morphology;
Comments Original Center People field contained: Charles Worley - electronics technician; Emile Bergeron - electronics technician; Wayne Baldwin - scientist, data archivist; Dave Twichell - chief scientist. Project = Chandeleur Island Mapping, Chandeleur Island Mapping
Platform
Length 58 feet
Itinerary
Start Biloxi, MS 2006-07-06
End Biloxi, MS 2006-07-18
Days in the field 11
Bounds
West -88.90945578
East -88.77579325
North 30.11252985
South 29.70435604

Personnel

Organization
384 Woods Hole Road
Quissett Campus
Woods Hole, MA02543-1598
(508) 548-8700
Principal investigators David C Twichell
Crew members
David C Twichell
Scientist, Staff
Wayne E Baldwin
Scientist, Staff
Emile Bergeron
Scientist, Staff
Charles R Worley
Scientist, Staff
Information specialist(s)
Wayne E Baldwin
Specialist, Information

Data types and categories

Data category: Location-Elevation, Seismics, Sonar
Data type: Navigation, Sub Bottom Profiler, Sidescan, Interferometric

Equipment used

Equipment Usage description Data types Datasets
Edgetech chirp subbottom profiler 512i Sub Bottom Profiler 2
DGPS Navigation (no data reported)
SEA SWATHplus-M 234 kHz Interferometric 1
Klein 3000 Sidescan 1

Datasets

Datasets produced in this activity

Dataset name Equipment Description Dataset contact
Chirp seismic data Edgetech chirp subbottom profiler 512i Linda P McCarthy
Chirp seismic images Edgetech chirp subbottom profiler 512i Linda P McCarthy
Bathymetry GIS data SEA SWATHplus-M 234 kHz Linda P McCarthy
Sidescan mosaic Klein 3000 Linda P McCarthy

Publications

Samples collected during this field activity