NOAA’s CENTER for OPERATIONAL OCEANOGRAPHIC PRODUCTS and SERVICES CO-OPS NWLON and Seasonal...

NOAA’s CENTER for OPERATIONAL OCEANOGRAPHIC PRODUCTS and SERVICESNOAA’s CENTER for OPERATIONAL OCEANOGRAPHIC PRODUCTS and SERVICES

CO-OPS NWLON and Seasonal Gauging in the Great Lakes - FY14 Efforts

September 16, 2014


Overview of Great Lakes NWLON Stations


Basic Gauge Configuration

Additional instrumentation not shown: CORS antenna (roof) and water temperature (5 ft. below LWD in lake or river environment)


Primary DCP

Redundant DCP

Primary Encoder

Redundant Encoder

Inside gauge house


The Sump

Heat Lamp

Floats

Counter weight

The heat lamp keeps the water from freezing during the cold winter months. The float rides the water surface and rises and falls with the water level providing an indication of the lake or river water level. The counter weight balances the movement of the float to keep the float tape on the gears of the encoder.


NGS geodetic benchmarks are used to validate the vertical stability of the water level network. In the Great Lakes there are be a minimum of five marks tied to each water level station.

Station Benchmarks


Seasonal Gauging

•Funded through NOAA’s Coastal Storms Program •Microwave Water Level sensor technology used to measure water level from June through September.

•Installations began May 15th and were completed May 31st.

•Partners include GLERL, Superior NERRS and Old Woman Creek NERRS.

NOAA’s CENTER for OPERATIONAL OCEANOGRAPHIC PRODUCTS and SERVICESNOAA’s CENTER for OPERATIONAL OCEANOGRAPHIC PRODUCTS and SERVICES9

Typical MWWL Gauge Installation


Old Woman Creek NERRS


Muskegon, MI


Manitowoc, WI


Potential Seasonal Sites for FY15

Traverse City, MI (Great Lakes Maritime Academy)

Michigan City, MI (Indiana Dunes National Park)

Sodus Bay, NY

Grand Marais, MI


Data Processing

Seasonal gauges are processed after the entire data set has been collected. Data is monitored in real-time.

6 minute data collected is QC’ed against neighbors for accuracy.

Hourly values are used to determine averages and max/min values.

Daily mean is average of hourly values from 01:00 through 24:00.

Monthly mean is average of all hourly values taken throughout the month.


Next Steps Station Removal October 2014. Datums computations and Hydraulic Corrector

calculations. Use data to test Hydraulic Corrector interpolation

model – findings will help scope seasonal gauging effort for IGLD.

Reevaluate FY15 sites to ensure value toward Partner efforts and IGLD unknowns.


Questions

Colleen Roche, P.E.

Center for Operational Oceanographic Products and Services

[email protected]

(301) 713-2900

NOAA’s CENTER for OPERATIONAL OCEANOGRAPHIC PRODUCTS and SERVICES CO-OPS NWLON and Seasonal...

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