Abstract
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As part of the Barrier Island Evolution Research project, scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center conducted nearshore geophysical surveys off the northern Chandeleur Islands, Louisiana, in June of 2011. The overall objectives of the study are to better understand barrier-island geomorphic evolution, particularly storm-related depositional and erosional processes that shape the islands over annual to interannual timescales (1-5 years). Collection of geophysical data will allow us to identify relationships between the geologic history of the island and its present day morphology and sediment distribution. This mapping effort was the first in a series of three planned surveys in this area. High resolution geophysical data collected in each of three consecutive years along this rapidly changing barrier-island system will provide a unique time-series dataset that will significantly further the analyses and geomorphological interpretations of this and other coastal systems, improving our understanding of coastal response and evolution over short time scales (1-5 years). This data series includes the bathymetric data that were collected during two cruises (USGS Field Activity Numbers 11BIM01 and 11BIM02) aboard the Research Vessel (R/V) SurveyCat and the R/V TwinVee along the northern portion of the Chandeleur Islands, Breton National Wildlife Refuge, Louisiana. Data were acquired with the following equipment: a Systems Engineering and Assessment, Ltd., SWATHplus interferometric sonar (234 kilohertz), an EdgeTech 424 (4-24 kHz) chirp sub-bottom profiling system, and a Marimatech E-SEA Sound 206 (200 kHz) echosounder. This report serves as an archive of processed interferometric swath and single-beam bathymetry data. Geographic Iinformation System data products include a 50-meter cell-size interpolated bathymetry grid surface, trackline maps, and point data files. Additional files include error analysis maps, Field Activity Collection System logs, and formal Federal Geographic Data Committee metadata. NOTE: These data are scientific in nature and are implicitly not to be used for navigation. Any use of trade names is for descriptive purposes only and does not imply endorsement by the U.S. Government. |
Oblique aerial photograph looking north along the Chandeleur Islands and adjacent sand berm, June 2011. Photograph by Karen Morgan. [Click to enlarge] |
Acknowledgements
The authors of this publication would like thank the U.S. Fish and Wildlife Service for their support and continued cooperation in this important research at Breton Island National Wildlife Refuge. We would also like to recognize and thank Arnell Forde, Kara Doran, and Jolene Gittens (U.S. Geological Survey) for conducting scientific, editorial, metadata, and Web design reviews that improved content and presentation of this report. Any reference of private organizations or commercial branding in this document does not constitute an official endorsement of that service or product.
Information Statement
This DVD publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
Suggested Citation
DeWitt, N.T., Pfeiffer, W.R., Bernier, J.C., Buster, N.A., Miselis, J.L., Flocks, J.G., Reynolds, B.J., Wiese, D.S., and Kelso, K.W., 2014, Coastal bathymetry data collected in 2011 from the Chandeleur Islands, Louisiana (version 2.0, July 21, 2015): U.S. Geological Survey Data Series 848, 1 DVD, available at https://dx.doi.org/10.3133/ds848.
Contact
Nancy DeWitt
Geologist
U.S. Geological Survey
St. Petersburg Coastal and Marine Science Center
600 4th Street South
St. Petersburg, FL 33701
(727) 502-8000
ndewitt@usgs.gov
