the chesapeake bay interpretive buoy system

Science, Service, & Stewardship

The Chesapeake Bay Interpretive Buoy System

05 November 2008

Validation and Quality Assurance of CBIBS Water Quality DataCBP Analytical Methods and Quality Assurance WorkgroupDoug Wilson & Peter Bergstrom, NCBO


CBIBS: Objectives

John Smith Water Trail

Education & Outreach

Chesapeake Bay Observing

System(IOOS)

• System built around an Integrated information network - connects buoys, data, web, education, information resources – embracing IOOS concepts and standards

• Education – buoy information willbe used in classrooms

• Buoys are Trailheads/markers for CJSCNHT; convey local and historicreference

• Versatile coastal observingplatforms with broad suite of measurements

“The Chesapeake Bay Interpretive Buoy System (CBIBS) is an innovative system to collect, transmit and interpret real-time environmental data from the Chesapeake Bay to a wide variety of constituents – including scientists, on-the-water users, educators, and natural resource decision-makers – and to fill critical observational gaps in the Chesapeake Bay.”


CBIBS: Target audience

CBIBS employs integrated ocean observing system methods and technology to meet the needs of Chesapeake Bay users. CBIBS is a component of the U.S. Integrated Ocean Observing System, supported by the NOAA Chesapeake Bay Office (NCBO) and Chesapeake Bay Observing System (CBOS) partners. CBIBS provides an unparalleled opportunity to demonstrate the broad utility of observing systems.

Environmental and natural resource planners and decision makers, and the scientists, analysts, andapplications developers who support them.


CBIBS: The System

Presently six buoys in the Chesapeake BayJamestown J 37.2044 N 76.7774 W 13 5/07Point Lookout PL 38.0330 N 76.3356 W 13 7/07Patapsco SN 39.1519 N 76.3913 W 7 8/07Stingray Point SR 37.5674 N 76.2572 W 7 7/08Susquehanna S 36.8460 N 76.3025 W 12 9/08Nauticus N 39.5444 N 76.0766 W 3 9/08


CBIBS Platforms

Platform: AXYS Technologies WATCHKEEPER BuoyBased on Tideland Signal SB-138P SentinelAXYS Watchman 500 Controller2200# Steel Anchor 1” Mooring Chain w/ 2.5:1 Scope

Comms: VZW / Airlink Pinpoint E Verizon EVDO static IP

Meteorology: RM Young 05103 Wind Speed / DirectionRotronics Temperature / Relative HumidityVaisala Barometer 10 min sampling / reporting

Currents: NORTEK 1 mHz Aquadopp Profiler 600 1Hz samples vector averaged from

:50 to top of each hourWaves: AXYS Technologies TRIAXYS OEM Wave Sensor

20 min sample from :40 to top of each hour

Water Quality: WETLabs WQM measuring temperature, conductivity, pressure, dissolved oxygen, turbidity, and chlorophyll A300 1 sec samples averaged :53 to :58 reported hourly

New for 2008: ISUS V3 Nitrate for SusquehannaGPS Water Level for Norfolk


CBIBS Access: www.buoybay.orgThe primary web site for CBIBS is WWW.BUOYBAY.ORG.The site addresses the three user groups with sections devoted to:


CBIBS Access: www.buoybay.org

Explore Buoy Data and Access Data and Metadata

These pages serve the needs of the traditional observing system users.

They include a Google Maps-based buoy locator page;

a page displaying all the most recent data readings;

a comprehensive graphing tool to visualize data time series;

and a page to download single sensor or integrated data sets.


CBIBS Access: Data Management• AXYS Watchman 500 data collection platform • AXYS DMS (running on a commercial ‘virtual’ server system) downloads data to

an SQL data base. • XML-based Web Services connect this data ‘back end’ to data management

‘middleware’.• Data Archive Handler performs transformations and preliminary QA/QC checks

& stores data.• Data Retrieval Handler interfaces with Storage and provides external and

internal access to the data.• Contains an OpenDAP server,

access to external data sources, and a Client Data Request Handler. Requests include browser based or designated users (e.g., the Verizon voice IVR, NWS, CBOS, applications, kiosks) via an API key.


CBIBS Access: Data Management

• For internal management, applications provide notification for off-line buoys,erroneous sensors, or deviations from a geographic location (‘anchor watch’).

• The system also supports applications for data delivery through RSS feeds and widgets, or any XML requests.

• A free-standing kiosk – duplicating the look of the buoy an featuring an audioand touchscreen interface - has been implemented on shore in view of the Nauticus buoy on the Elizabeth River in Norfolk, VA.


CBIBS DATA: Wind and Waves


CBIBS DATA: Water Quality and Currents


CBIBS Water Quality Data

~WL

CBIBS Water Quality Measurements made with WETLabs WQM

Pumped CTDO2

Temperature: Seabird SBE 3

Conductivity: Seabird SBE4

Dissolved Oxygen: Seabird SBE 43

Pressure: Druck Silicon Diaphragm

Turbidity: WETLabs FLNTU 700 nm

Chlorophyll A: WETLabs FLNTU 470/695 nm

Multiple Anti-Fouling Strategies:

Bleach Injection

Inline TBT cartridges

Copper cladding


Instrument Specifications

Range Resolution Accuracy

Temperature -5 - 50°C 0.01°C ±0.15°C

-5 – 35 °C 0.001 °C ±0.002 °C

Conductivity 0 - 100 mS/cm 0.001 - 0.1 mS/cm ±0.5% of reading

0–90 mS/cm 0.005 mS/cm ±0.003 mS/cm

Pressure 0 - 61 m 0.001 m ±0.12 m

0 - 100m .01m ±0.1 m

Dissolved Oxygen 0 - 20 mg/L 0.01 mg/L ±1% of reading or 0.1 mg/L

120% Sat. 0.01 mg/l ±0.1 mg/l

Chlorophyll A 0 - 400 mg/L 0.1 mg/L Depends on Calibration Stds

0 – 100 mg/L 0.04 mg/L ±0.2 mg/L

Turbidity 0 - 1,000 NTU 0.1 NTU ±2% of reading or 0.3 NTU

0 – 100 NTU 0.04 NTU ±0.1 NTU

Conclusion: Instruments are functionally equivalent with primarily variations in range


CBIBS Water Quality

• Approximate sensor depths are 0.5 (T, C) to 0.8 (Tu, Chl) meters• WQ Data are averages of 300 1-sec readings taken from :53 to :58 and

reported at :00• Sampling parameters and reporting times could be varied; Met data are

presently reported every :10 • Field deployment tests show all WQM sensors remain within 5% of

sampled values for at least 90 days (DO worst; others much better)• Presently returning for factory calibration but will be setting up a test,

evaluation, and calibration facility (that can incorporate other existing resources)

NCBO is presently developing a data validation, quality assurance, and maintenance plan for the CBIBS system. Would like for the data to

• Meet standards set by CBP for WQ data• Be useful to CBP if possible• Benefit from experience of CBP in WQ data collection and use

the chesapeake bay interpretive buoy system

Documents