Benthic Flux Sampling Device
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Figure 1. The Benthic
Flux Sampling Device (BFSD). |
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Figure 2. Deploying the BFSD from
a pier at the Dodge Pond Acoustic Measurement Facility,
CT. |
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The Benthic Flux Sampling Device (BFSD) is an autonomous instrument
for in-situ measurement of toxicant flux rates from sediments.
A flux out of or into the sediment is measured by isolating
a volume of water above the sediment, drawing off samples from
this volume over time, and analyzing these samples for increase
or decrease in toxicant concentration. Increasing concentrations
indicate that the toxicant is fluxing out of the sediment.
Decreasing concentrations indicate that the toxicant is fluxing
into the sediment.
In Figure 1, right, the pyramid-shaped tubular
frame, open-bottomed chamber, and associated sampling and
control equipment can be seen. At the top of the frame is an
acoustically released buoy for BFSD recovery. At the bottom
of the frame are the open-bottomed chamber and associated sampling
gear, flow-through sensors, data acquisition and control unit,
video camera system, power supply, and oxygen supply system.
Capabilities (direct support):
- Two systems available on a cost reimbursable basis for direct
support to Navy and other agencies.
Applications:
- Puget Sound Naval Shipyard, WA
- Former Alameda NAS, CA
- Naval Base San Diego, CA
- Pearl Harbor, HI
- Shelter Island Yacht Basin, CA
- NUWC DIV NEWPORT Dodge Pond Acoustic
Measurement Facility, CT
More Information:
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