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Hanes, D.M., Erikson, L.H., Lescinski, J.M.R, 2007, Tables in Seabed ripple morphology and surficial sediment size at the SAX04 experiments near Fort Walton Beach, Florida, fall 2004:.This is part of the following larger work.
Hanes, D.M., Erikson, L.H., Lescinski, J.M.R, 2007, Seabed ripple morphology and surficial sediment size at the SAX04 experiments near Fort Walton Beach, Florida, fall 2004: Open-File Report 2007-1232, U.S. Geological Survey, Coastal and Marine Geology Program, Menlo Park, CA.Online Links:
This is a Point data set.
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.001. Longitudes are given to the nearest 0.001. Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257222.
Mean heading, pitch, and roll measured at each ADP Drop: Station ID ADP ID Heading (decimal degrees) Pitch (decimal degrees) Roll (decimal degrees) Ripple wavelengths and orientations from INX: Drop ID 4 m scan lambda (meters) 4 m scan delta (degrees) 10 m scan lambda (meters) 10 m scan delta (degrees) Sweep radii (meters) Employeed lambda (meters) Employed delta (degrees) Employed Sweep used Summary of thresholds chosen to extract MTA data: Drop ID Filename Threshold value(s) employed (mV) Ripple heights obtained with the MTA: Drop ID ripple height (centimeters) Ripple heights obtained with the slide projector: Drop ID ripple height (centimeters) Data summary: Index Drop ID height (meters) Latitude (decimal degrees) Longitude (decimal degrees) Ripple wavelength (centimeters) Ripple orientation (degrees counter clockwise from East) Ripple height (centimeters) Sediment grain size (milimeters)
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Sediment transport in the coastal region is a complex process involving interactions between flow dynamics, sediments, and bedforms. Sediment type and bed geometry directly influence entrainment of sediments into suspension, and at sites where ripples occur (sand formations on the order of several cm high and less than two meter long wavelengths), the understanding of ripple dynamics is an essential component in improving sediment transport models. To gain a better understanding and ability to predict sediment transport, a field study was undertaken to investigate morphology, orientation, and dynamics of ripples on the seafloor.
U.S. Geological Survey, Coastal and Marine Geology Program, 2007, InfoBank.Online Links:
- <http://walrus.wr.usgs.gov/infobank/p/p104fl/html/p-1-04-fl.meta.html> <http://walrus.wr.usgs.gov/infobank/p/p204fl/html/p-2-04-fl.meta.html>
U.S. Geological Survey, Coastal and Marine Geology Program, 200412, Ripples for everyone! - Investigating how sediment moves on the sea floor in Sound Waves Monthly Newsletter, Coastal Science & Reasearch News from Across the USGS.Online Links:
All avaialble data were analyzed; in cases where multiple data were available for a given site and parameter, optimal results based on statistcal analyses are reported.
Ripple wavelength and height measurements are direct interpretations from sonar data corrected for tilt and rotation where necessary. Ripple heights are estimates based on best fit sinusoids to measured profile data. Grain sizes represent direct point measurements of surficial sediments.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints:
- Public domain data from the U.S. government is freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.
(831) 427-4718 (voice)
(831) 427-4748 (FAX)
dhanes@usgs.gov
Although this data set has been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
(831) 427-4718 (voice)
(831) 427-4748 (FAX)
dhanes@usgs.gov