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What’s New in Hydroacoustics? September 2008

What’s New in Hydroacoustics? September 2008. Kevin Oberg. With help from David Mueller, Chad Wagner, Ryan Jackson, Mike Rehmel , and Jon Czuba. What’s New?. Equipment Software Methods & Policy Publications Training. RS Live, RiverRay , ADC WRII, new tools Moving bed tests, Other

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What’s New in Hydroacoustics? September 2008

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  1. What’s New in Hydroacoustics?September 2008 Kevin Oberg With help from David Mueller, Chad Wagner, Ryan Jackson, Mike Rehmel, and Jon Czuba

  2. What’s New? • Equipment • Software • Methods & Policy • Publications • Training • RS Live, RiverRay, ADC • WRII, new tools • Moving bed tests, Other • New reports • Webinars, schedule for formal training courses, Web-based training Equipment | Software | Methods/Policy | Publications | Training

  3. New SonTek YSI Profilers S5 • 5-beam profiler • 4 beam Janus configuration • 3 Mhz • Velocity profiling range ~0.2 m to 5.0 m • 1 vertical beam for depth measurement • 1 Mhz • Range ~0.15 - 15m Pre-release specs – Subject to change Units not available for sale – Oct. 2008 Equipment | Software | Methods/Policy | Publications | Training

  4. New SonTek YSI Profilers • 9-beam 3-frequency profiler • 4 beams at 1 Mhz • 4 beams at 3 Mhz • 1 beam @ 500 kHz (depth) • Nominal velocity profiling range ~0.3 m – 30.0 m • Vertical beam range ~80m M9 Units not available for sale – Oct. 2008 Pre-release specs – Subject to change Equipment | Software | Methods/Policy | Publications | Training

  5. Prototype ADP, GPS, & Float SonTek/YSI plans to offer a trimaran and their own monohull design, not necessarily similar to this monohull Pre-release specs – Subject to change Units not available for sale – Oct. 2008 Equipment | Software | Methods/Policy | Publications | Training

  6. Automatic Configuration • Automatic velocity cell size adjustment • Automatic switching between pulse-coherent and narrowband • M9 profiler will switch between 1 and 3 Mhz on the fly Equipment | Software | Methods/Policy | Publications | Training

  7. Software and Data • Data are stored in profiler. • Data viewed and profiler controlled with laptop and/or Windows Mobile device (Motorola Q Phone) • Bluetooth or Freewave telemetry Pre-release specs – Subject to change Units not available for sale – Oct. 2008 Equipment | Software | Methods/Policy | Publications | Training

  8. Ott ADC Equipment | Software | Methods/Policy | Publications | Training

  9. Comparison Qm’s Equipment | Software | Methods/Policy | Publications | Training

  10. Lag in Velocity Due to Sampling Volume Equipment | Software | Methods/Policy | Publications | Training

  11. Sampling Volume FlowTracker Ott ADC Equipment | Software | Methods/Policy | Publications | Training

  12. ADC Enhancements • Compute/record/display flow angles • Store velocity time series (not just final value) • Provide software that supports analysis of above data • Real time beam checks • When point velocity measurement is invalid, prompt user for doing another velocity observation (at a different location) • Working with Ott to implement enhancements Equipment | Software | Methods/Policy | Publications | Training

  13. TRDI – RiverRay • Phased array transducer (flat face) • 30-degree beams (larger unmeasured area) • Single frequency – 600 kHz • 2 prototypes delivered in September Units not available for sale as of Sept. 2008 Equipment | Software | Methods/Policy | Publications | Training

  14. TRDI – RiverRay • Integrated float with Bluetooth comms (default) Units not available for sale as of Sept. 2008 Equipment | Software | Methods/Policy | Publications | Training

  15. RiverRay Features • Will default to an ‘auto’ mode. • Will consist of both pulse coherent (WM 5/11-like and incoherent modes (WM1) all at the same time • Depth cell sizes will depend on depth and which ‘mode’ is used to make the velocity measurement Equipment | Software | Methods/Policy | Publications | Training

  16. Use of Ultra-Mobile PCs Example UMPC with Wireless and Bluetooth Cost: ~$1,000 Instrument News article – Sonny Anderson Equipment | Software | Methods/Policy | Publications | Training

  17. High Speed Tethered Boat • Noticed many problems in fast flows • Air entrainment and/or ADCP being ‘pulled’ out of the water • RFP for a new boat is out. Equipment | Software | Methods/Policy | Publications | Training

  18. RC Boat – OceanScience Problems with High-speed boat - nose submerging in low velocities. Caused by deformation of plastic used. OS working on solution. Equipment | Software | Methods/Policy | Publications | Training

  19. RC Boat – SeaRobotics CA WSC using 2 boats for mapping applications. Still some work needed Equipment | Software | Methods/Policy | Publications | Training

  20. WinRiver II Status • Numerous bugs in version 2.02 • OSW has tested several beta releases since early August. • Program is more stable now; waiting on a final beta to test • Release of 2.03 in November? Equipment| Software | Methods/Policy | Publications | Training

  21. Communications • OSW strongly encourages users to use USB-to-serial adapters with laptops – even those that have a built-in RS-232 • See Hydroacoustics Forums for info on suggested models (https://simon.er.usgs.gov/smf/) • HIF will stock a 2-port USB-to-serial adapter for purchase. Cost ~ $35. Equipment| Software | Methods/Policy | Publications | Training

  22. MidSection Software – Sontek • Methods as documented by Sontek seem correct • Limited testing has been done Equipment| Software | Methods/Policy | Publications | Training

  23. MidSection (SxS) Software – TRDI • Some concerns about algorithms used in TRDI SxS software • WRII 2.02 SxS can crash and user will be unable to resume Qm • TRDI addressing technical concerns. Changes may appear in WRII version 2.03? • Very limited testing Equipment| Software | Methods/Policy | Publications | Training

  24. MidSection Software • OSW strongly discourages use of ‘home-grown’ SxS computations due to various possible technical problems such as: • Flow angles • Extrapolation • Valid manual computations are time consuming and are difficult to check Equipment| Software | Methods/Policy | Publications | Training

  25. Automated QA / QC Equipment| Software | Methods/Policy | Publications | Training

  26. Automated QA / QC • Prototype auto QA/QC delivered to TRDI and SonTek 18 months ago. • Both vendors say they are committed to incorporating this into their software. • TRDI has promised to focus on this in their first major update to WinRiver II in 2009 • SonTek/YSI is incorporating some of this into RiverSurveyor-Live software Equipment| Software | Methods/Policy | Publications | Training

  27. Extrapolation Analysis Tool Equipment| Software | Methods/Policy | Publications | Training

  28. SMBA(Stationary Moving bed Analysis) • Updated to process corrections from multiple moving bed tests • Effectiveness of the approach used to do this is still being studied Equipment| Software | Methods/Policy | Publications | Training

  29. LC (Loop Correction) • Distributes loop correction across cross section based on near bed velocities • Preferred loop correction method • Improvements planned • User interface • Check quality of compass cal • Report number of invalid ensembles Equipment| Software | Methods/Policy | Publications | Training

  30. GPS – Collect VTG & GGA • VTG is Doppler-based measurement • Less sensitive to multi-path effects • Usually results in better quality data VTG GGA Equipment| Software | Methods/Policy | Publications | Training

  31. Moving-Bed Tests • USGS policy will require that a moving-bed test (MBT) be collected prior to every Qm • No exceptions! • Use the SMBA and LC software to analyze MBT’s 560 feet in 540 s => 1 ft/s MB velocity Equipment| Software | Methods/Policy | Publications | Training

  32. Moving-Bed Tests • Three acceptable methods for performing a MBT • stationary test - no GPS • stationary test - with GPS, or • the loop method • For stationary MBT’s, we suggest multiple MBT’s Flow DUP Equipment| Software | Methods/Policy | Publications | Training

  33. Moving-Bed Conditions • Order of preference • DGPS • Loop correction method • Multiple stationary MBT’s • Section by section software DUP Equipment| Software | Methods/Policy | Publications | Training

  34. Current USGS Policy for Qm’s • USGS policy is that 4-transect mean is used as a measured discharge under steady flow conditions • Policy was arrived at somewhat arbitrarily – did not have a rigorous scientific basis • Reflects need to have good spatial and temporal averaging Equipment| Software | Methods/Policy | Publications | Training

  35. Number of Transects Analysis • 28 comparisons having 12-transects were used • 12-transect mean was assumed to be ‘true’ Q • Percent difference for 1-, 2-, 4-, 6- and 8-pass means computed Equipment| Software | Methods/Policy | Publications | Training

  36. RG Exposure Time Analysis Oberg and Mueller (2007a). “Validation of Streamflow Measurements Made with ADCPs.” Journal of Hydraulic Engineering, 133(12), 1421-1432. Equipment| Software | Methods/Policy | Publications | Training

  37. Exposure Time For ADCP Qm’s • Exposure time (D) is the total time spent sampling the flow • Oberg and Mueller (2007) suggest that D is more important than number of transects for reducing uncertainty in Q • OSW is conducting tests to validate this hypothesis Equipment| Software | Methods/Policy | Publications | Training

  38. StreamPro Exposure Time Equipment| Software | Methods/Policy | Publications | Training

  39. Validation Data Possible policy – For steady flows, D must be ≥ 720 s & minimum of 2 transects Equipment| Software | Methods/Policy | Publications | Training

  40. Discharge Measure-ment ‘Manual’ Techniques and Methods Report Expected to be approved and published – Oct-Dec 2008 Compilation of OSW technical memos, QA Plan, and Simpson report, plus new guidance Replacement for ‘Simpson’ report Equipment| Software | Methods/Policy | Publications | Training

  41. Capability Fact Sheet Equipment| Software | Methods/Policy | Publications | Training

  42. Evaluation of GPS Receivers and VTG • Report will be published in 2009. • Selected results: • Recommend use Novatel Smart Antenna or Hemisphere Crescent A100 • Trimble AgGPS 132 and similar models have some known issues with VTG data • Testing of these receivers is underway; Environment Canada uses Novatel • Don’t use handheld receivers Equipment| Software | Methods/Policy | Publications | Training

  43. Using ADCPs in Moving Bed Conditions • Web-based class has been developed • Currently undergoing review / revision • Should be available early in FY09 • Will be offered via NTC / DOILearn Flow DUP Equipment| Software | Methods/Policy | Publications | Training

  44. Status of Classes • 10 – 12 1-week classes taught annually! • 7 Basic ADCP • 2 Index Velocity • 2 Refresher classes • Classes are in high demand. • Short courses at Data Conferences & elsewhere • Possible velocity mapping / analysis class in late 2009 Equipment| Software | Methods/Policy | Publications | Training

  45. Proposed Schedule Equipment| Software | Methods/Policy | Publications | Training

  46. Other Training Info • Will be looking to add new Web-based classes, perhaps Key Concepts, Water Modes, etc. (costly) • OSW has maintained their own training registration system. We will no longer use that system. Users will register via DOILearn. • Supervisor approvals needed in timely manner if you want to get into the class Equipment| Software | Methods/Policy | Publications | Training

  47. Questions?

  48. Changes Needed • SxS • GPS – Loop (1 and 2) after that multiple MBT’s and SxS are even. If cannot BT • GPS – have to have good GPS and comp cal • Loop – must be able to BT and comp cal • SMBT - • Home-grown SxS • Caveats about units not available for sale • HIF Stocking USB-serial

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