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Patrick J. McCurry, P.Eng National Manager, Hydrometric Operations Ottawa, Canada

Water Survey Of Canada Presentation to WMO Meeting on The Assessment of the Performance of Measurement Instrumentation Geneva, Switzerland April 25, 2007. Patrick J. McCurry, P.Eng National Manager, Hydrometric Operations Ottawa, Canada. Overview. Focus of efforts Issues being faced

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Patrick J. McCurry, P.Eng National Manager, Hydrometric Operations Ottawa, Canada

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  1. Water Survey Of Canada Presentation to WMO Meeting onThe Assessment of the Performance of Measurement Instrumentation Geneva, SwitzerlandApril 25, 2007 Patrick J. McCurry, P.Eng National Manager, Hydrometric Operations Ottawa, Canada

  2. Overview • Focus of efforts • Issues being faced • What has WSC Done • Issues still to be addressed

  3. New Technologies • Focus over past 10 years: • Acoustic Doppler • Profilers: ADCP’s – moving boat, section-by-section, in-situ • Velocimeters: ADVM’s – in-situ • AVM • Point velocity: Flowtrackers, section-by-section • Transectional: AFFRA • Non-contact/non-intrusive • Stage: radar & laser • Surface velocity: radar

  4. Issues Related to New Technology Acceptance & Introduction • Suitability for program • Stable or still evolving? • Efficiencies, cost effectiveness • Impacts on: • Standards, procedures, methodologies • Occupational health and safety • Required skill, knowledge, training • Reduced number of experts • Retirements, staffing cuts, limited new hiring

  5. What has WSC Done? • Leveraged with other “Hydrologic Services”: • Federal-provincial-territorial agreements • Technology sharing/evaluation is limited • With USGS • Memorandum of Cooperation • Sharing of knowledge, expertise, resources for initiatives of mutual interest • Technology development, evaluation, acceptance, training • With other governments (domestic & international) • Nothing formal but increasing number of informal linkages and exchanges of experiences, issues, solutions via e-mail • Universities and other Research Institutes • Scattered work with scientists

  6. What has WSC Done? • Worked closely with USGS on the hydroacoustic and non-contact technology development, enhancement, evaluation, acceptance, quality assurance, and training, including: • Testing commercially available hydroacoustic, radar and laser technologies • Working with selected manufacturers & research scientists to enhance technology for market readiness, and to develop “next generation” products • Investigation of flow disturbance around transducer heads • How to deal with moving bed situations for hydroacoustics • Application of, and alternatives to, GPS for hydroacoustics • Measurement platforms – tethered and remote control boats

  7. What has WSC Done? • Conducted comparison testing of hydroacoustics to Price AA meters: • TRDI ADCP & StreamPro, Sontek ADP & Flowtracker • Developed and followed test procedures for acceptance of upgrades to system firmware and software • Written operational specifications for (moving boat) acoustic Doppler technology • Procurement for operational program based on units meeting those specs (Qualified Products)

  8. What has WSC Done? • Implemented a policy on use of acoustic Doppler data in rating curve development as applied to final data production • ADCP procedural manuals completed & issued • Field Procedures & Data Review and Approval • ADCP accreditation process developed, approved and implemented

  9. ADCP Procedures & Accreditation

  10. Issues to be Addressed • Data integrity • Are data based on measurements with hydroacoustic and non-contact instruments homogeneous with historical data? • How to conduct an investigation into this? • Data validity • Is it valid to compare the output from hydroacoustic instrumentation with rotating cup instrumentation? • Flow disturbance around transducer heads • From transducer casing itself • Boat hull • Blanking distance below transducer head • Number of transects • Moving beds • Swaying of floating platforms for section-by-section measurements

  11. Thank You !

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