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Turbulent Erosion
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2015
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F. G. Walton Smith
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Project Title: |
Turbulence-Controlled Erosion of Sand-Mud Sediments |
Project Status: |
Submitted |
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Principal Investigator: |
Kevin B. Briggs, NRL |
Project Institution: |
NRL |
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Project ID: |
103875 |
Version #: |
3 |
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Date Submitted: |
4/8/2013 4:25:00 PM |
Created By: |
Kevin B. Briggs |
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Date Last Modified: |
9/17/2014 10:16:00 AM |
URI Serial #: |
None |
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Funding Agencies: |
NAVY/NRL - BE032-04-44-T085-14 - Funded
OTHER - SERDP - Funded |
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Summary of Field Work: |
Deployment of instrument packages on the sea floor with instrumentation autonomous or cabled to ship for real-time data collection of current velocity profiles, seafloor roughness, and wave statistics; diver-collected data including cores and in situ seafloor erosion measurements; remotely deployed sediment profile imaging camera. |
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Summary of Facility Requirements: |
Vessel to deploy large instrument package (NRL quadpod) and anchor boat with cable distance to package; monitor for 7-8 days, while conducting diver operations to collected data around instrument package. Vessel to deploy SPI (Sediment Profile Imager) camera while underway or drifting; divers to collect cores around experimental site. Vessel to collect Acoustic Sediment Classification System data with ship's depth sounder by traversing experimental site. |
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Summary of other requirements and comments: |
CTD operation with Niskin bottles for collection of bottom water; scuba air compressor. Small boat for use as diver chase/diver recover vessel. |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
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Request ID: |
1006968 |
Created By: |
Kevin B. Briggs |
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Date Last Modified: |
9/17/2014 10:16:00 AM |
Date Submitted: |
5/20/2014 11:56:00 AM |
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Year: |
2015
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Ship/Facility: |
F. G. Walton Smith
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Optimum Start Date:
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3/24/2015 |
Dates to Avoid: |
Avoid New Moon (Mar 20) and Full Moon (Apr 4) to minimize tidal currents |
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Earliest Start Date: |
3/9/2015 |
Multi-Ship Op: |
No |
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Latest Start Date: |
3/24/2015 |
Other Ship(s): |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
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9 |
1 |
1 |
2 |
13 |
Repeating Cruise?
(within same year) |
No |
Interval: |
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# of Cruises: |
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Description of Repeating cruise requirements: |
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Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
Experiment site is remote: F.G. Walton Smith is nearest platform for minimizing transit to site. Also, F.G. Walton Smith is ideal platform for deploying quadpod and conducting diving operations from. Time of experiment to coincide with last of season's winter/first of spring storm fronts to ensure strength and speed of wind forcing for sediment resuspension and transport. Because of strong tidal currents hindering diver operations, we request a time period for science days that coincides with the minimum tidal range and maximum number of slack tide periods occurring within daylight hours for this time of year (March 26 - Apr 3). This allows loading of ship on March 24, transits on March 25 and April 4, and unloading on April 5. |
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Short Description of Op Area
for use in schedules: |
Dry Tortugas |
| Description of Op Area: |
Southwest Channel, between Loggerhead and Garden Keys |
| Op Area Size/Dia.: |
<1 n.mi. |
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Lat/Long |
Marsden Grid |
Navy Op Area |
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Beginning
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24.627017° N
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82.90725° W
map
24° 37.62102' N
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82° 54.435' W
map
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Ending
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24.624533° N
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82.906133° W
map
24° 37.47198' N
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82° 54.36798' W
map
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Show Degrees Minutes |
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Foreign Clearance Required? |
No |
Coastal States:
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 Important Info on Foreign Research Clearances
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Are you or any member in your science party bringing in any science equipment items which are regulated for export by the International Traffic in Arms Regulations (ITAR) and/or the Export Administration Regulations (EAR)?
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No |
If yes, have you applied for the necessary permits through your export control office?
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No |
| Questions about ITAR/EAR regulations?
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Comments about foreign clearance requirements or
description of any other special permitting requirements
(e.g., MMPA, ESA, IHA, Marine Sanctuaries, etc.) |
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Requested Start Port |
Intermediate Port(s) |
Requested End Port |
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Miami, FL, USA |
None |
Miami, FL, USA |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
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Important Info on Working in Foreign Ports
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Chief Scientist: |
Kevin B. Briggs, NRL |
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# in Science Party |
12 |
# of different science teams |
1 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
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1 |
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Explanation of Science Party Requirements and Technician Requirements |
NRL and UF will run bottom-instrumented
equipment, diving operations, and dive compressor; VIMS researchers will operate microcosms in ship's lab; vessel tech required for CTD. |
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 Dynamic Positioning | ADCP | Multibeam | Seismic |
| Dredging/Coring/Large Dia. Trawl Wire | Stern A-frame | Fiber Optic (.681) | 0.680 Coax Wire |
 SCUBA Diving | Radioisotope use - briefly describe | NO Radioisotope use/Natural level work | Other Operator Provided Inst. - Describe |
| 0 PI-Provided Vans - briefly describe | MOCNESS | | |
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Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling. |
Ship should remain stationary by anchoring, preferably 2-point (bow-stern) configuration. Two bow anchors suggested to add stability.
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
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