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Harvey freshwater
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2018
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Pelican
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Project Title: |
Measuring freshwater exports from Galveston Bay after Hurricane Harvey |
Project Status: |
Submitted |
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Principal Investigator: |
Kristen Thyng, TAMU_CS |
Project Institution: |
TAMU_CS |
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Project ID: |
105934 |
Version #: |
1 |
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Date Submitted: |
9/16/2017 2:33:00 PM |
Created By: |
Kristen Thyng |
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Date Last Modified: |
12/7/2017 10:50:00 AM |
URI Serial #: |
None |
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Funding Agencies: |
NSF/OCE/PO - 1762157 - Funded |
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Summary of Field Work: |
Characterize the salinity and temperature (density) structure and current in Galveston Bay and on the Texas shelf following Hurricane Harvey. These measurements will yield the residence time response of Galveston Bay to the reintroduction of salinity and the freshwater plume exiting the Bay.
We will take periodic CTD casts and underway acoustic Doppler current profiler (ADCP) measurements within Galveston Bay and on the Texas shelf outside the Bay. Periodic CTD casts along the Bay axis and ship channel will measure the horizontal and vertical stratification and capture the dynamics of the salt wedge intrusion along the ship channel. We will measure the structure of this underway ADCP current measurements together with simultaneous CTD profiling using a tow-yo CTD sled. Two transects are planned. One will extend 30 to 50 km offshore normal to the coast towards TABS Buoy F. The second transect will be parallel to shore from San Luis Pass to Bolivar Pass between the 10 and 20 m isobaths. We will have 3, 3-day cruises in the Bay and 3, 4-days cruises on the shelf, in September, October, and February. |
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Summary of Facility Requirements: |
We need to mount an ADCP over the side of the boat and be able to station keep for CTD profiling. For the offshore cruises, we will mount a winch for the tow-yo CTD sled and need to feed the cable through a block either on a crane or A-frame of the ship. Sufficient deck space to set up data acquisition station (25 sq ft) and stage the ADCP while not in the water. |
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Summary of other requirements and comments: |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
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Request ID: |
1009603 |
Created By: |
Kristen Thyng |
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Date Last Modified: |
9/16/2017 2:33:00 PM |
Date Submitted: |
9/16/2017 2:33:00 PM |
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Year: |
2018
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Ship/Facility: |
Pelican
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Optimum Start Date:
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2/26/2018 |
Dates to Avoid: |
Spring break week of March 12. |
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Earliest Start Date: |
2/26/2018 |
Multi-Ship Op: |
No |
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Latest Start Date: |
3/26/2018 |
Other Ship(s): |
None. |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
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3 |
1 |
1 |
0 |
5 |
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: |
This will be the third cruise (2 in 2017) to measure salinity, temperature, and currents near Galveston Bay. We want to do transects up-down coast and across the inner shelf to 50m while steaming for the shallower sites at 4kts for the ADCP unit. We expect this to take several days. We also hope to get several tidal cycles worth of bay plume information just outside the bay. |
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Short Description of Op Area
for use in schedules: |
Galveston Bay |
| Description of Op Area: |
Shelf area outside Galveston Bay within 50 meter isobath. |
| Op Area Size/Dia.: |
125 |
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Lat/Long |
Marsden Grid |
Navy Op Area |
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Beginning
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29.298324° N
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94.842368° W
map
29° 17.89944' N
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94° 50.54208' W
map
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Ending
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29.298324° N
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94.842368° W
map
29° 17.89944' N
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94° 50.54208' 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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Yes |
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.) |
The ADCP is export controlled. |
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Requested Start Port |
Intermediate Port(s) |
Requested End Port |
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Galveston, TX, USA |
None |
Galveston, TX, USA |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
We will start and end at Galveston. |
Important Info on Working in Foreign Ports
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Chief Scientist: |
Kristen Thyng, TAMU_CS |
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# in Science Party |
8 |
# of different science teams |
1 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
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3 |
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Explanation of Science Party Requirements and Technician Requirements |
The science party is self-sufficient. 1 technician is required to man the hull-mounted ADCP and 1 technician is required to operate the CTD. Another would help with monitoring in a different shift. |
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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. |
CTD rosette
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
N/A |
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