NOAA’s CENTER for OPERATIONAL OCEANOGRAPHIC PRODUCTS and SERVICES NOAA/NOS/CO-OPS Maritime Services Current Observation Project San Francisco Bay and Vicinity.

NOAA’s CENTER for OPERATIONAL OCEANOGRAPHIC PRODUCTS and SERVICES

NOAA/NOS/CO-OPSMaritime Services

Current Observation ProjectSan Francisco Bay and Vicinity

Carl KammererProject Lead


Background

• NOAA is in the process of developing a hydrodynamic model of San Francisco Bay (outside the Gate to Antioch/Rio Vista).

• CO-OPS will be surveying currents in support of this modeling effort.

• Whenever possible, CO-OPS wants to leverage resources to meet the needs of many. In addition to modeling, accurate and relevant tidal current data supports:• Navigation• Resource Protection• Engineering (energy, bridges, etc.)• Restoration/remediation• Recreation


Tentative Plans

FY2011 - User Meetings and Reconnaissance.• On-water recon at potential sites identifies:

– Bottom Type– Depth– Salinity– Traffic/Usage

• We also determine possible staging locations and capable vessels.


Tentative Plans

2012 and 2013 we plan on conducting a current observation survey.

• 25 stations in 2012• 20 stations in 2013• Data are analyzed after recovery of instruments• New/updated predictions will follow a year later

– Special predictions can be made available sooner if needed.


Model-Driven (teal)

& Historic Locations (white)


6 Reference & 3 Active PORTS® Stations


• Based on user requests from– Other Federal, State and Local Government Organizations– Professional Mariners– Other Marine Organizations– Public

• Oceanographic Significance• Historic Locations• International Hydrographic Organization (IHO)

recommended criteria.

Additional Locations


Method

• Measurements will be made with acoustic Doppler current profilers (ADCP):– They are self contained (not real-

time).– They will be upward looking.– There will be no cabling or

infrastructure requirements.


There are 2 basic types of platforms that will be used for this survey:

• Bottom Mounted– Shallower water ( <100 feet )– Where trawling is present

• Taut-Line Subsurface Buoy (SUBS)– Deeper Water– No Trawling or other impacts– Does have some motion with currents.

• There will be no surface presence from either platform.

Platforms


• Less than .75 meters high– TRBM– MTRBM– ES2– Recovered in entirety

via acoustic release

PlatformsPlatformsBottom Mounts

MTRBMTRBM


PlatformsSUBS

Taut-Line Subsurface Buoy• From a few meters to tens of

meters, depending upon requirements

• Float with ADCP• Second buoy if needed for

floatation• Acoustic Release• Chain/cable (left on bottom)• Anchor (typically steel- left

on bottom)


• Deployment– About 15 minutes on site, depending upon conditions and

platforms type.– Arrive on station & check traffic.– Lower or free fall to bottom.

• Typical vessel has A-Frame or crane with a winch.

– CTD cast.– Record required metadata

• Date, time, lat and long, depth, etc.

• 35 to 70 days on bottom – Again… no surface presence.

SURVEY


• Recovery– About 30 minutes on site, depending upon conditions and

platforms type.– Arrive on station & check traffic.– Signal acoustic release.

• Recover using winch and A-frame or if bottom mount• Recover by hand or winch & crane for SUBS

– CTD cast.– Record required metadata

• Date, time, lat and long, depth, etc.

• Data are downloaded and transferred to CO-OPS in Silver Spring, MD.

SURVEY


Raw Data

Metadata

Residuals (Non-Tidal)

Tidal Constituents

Products:Tidal Current Tables

Web Predictionstidesandcurrents.noaa.gov

Reports

Processing


Questions?

Contact: [email protected]

office: 603-862-3285Cell: 301-908-1545

mailto:[email protected]

NOAA’s CENTER for OPERATIONAL OCEANOGRAPHIC PRODUCTS and SERVICES NOAA/NOS/CO-OPS Maritime Services Current Observation Project San Francisco Bay and Vicinity.

Documents

services model

current observation

services tentative plans2012

relevant tidal current

possible staging locations

modeling effort

water recon

mountedshallower water