acoustic doppler technology for streamflow data collection
Post on 07-Jan-2016
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Acoustic Doppler Technology for Streamflow
Data CollectionDon Hayes
Richmond, Va.
History
• Vane
• Electro-magnetic Velocity Meter
• Acoustic Velocity Meter
• Acoustic Doppler Current Profilers
Acoustic Doppler Current Profilers
ADCP Applications• Instantaneous Discharge Measurement
• Continuous Measurement—fixed mount
• Hydrographic Survey
• Calibrate and Validate Two-Dimensional Hydrodynamic Models
• Estimating Sediment Concentrations Using Acoustic Backscatter
Why do people want to use ADCP’s?
1. More accurate measurements
2. Better science (model calibration, water quality studies, etc.)
3. Safety and Efficiency
Theory of DischargeTheory of DischargeMeasurementsMeasurements
Conventional Discharge Measurement
Width
Depth
Velocity
Acoustic Profiler Discharge Measurement
Measured and Unmeasured Areas
VerticalShore estimate
TriangularShore estimate
Top estimate
Bottom estimate
Measured
It is not magicIt is not magicQuality Assurance is importantQuality Assurance is important
Progression of ADCP Use
Indiana’s Original Tethered Boat
• Catamaran design
• Aluminum frame
• Wireless modems
Handle
Foam floats
Electronics box
ADCP
OceanScience RiverBoat
• Cost is ~$2,500. Comes with ADCP cable and radio/power connectors
• Can be adapted to other profilers (SonTek)
• 47 purchased by USGS
ADCP
Slot for
rudder
Tennessee Tethered Boat
Cost: < $600 US
Nortek BoogieDopp
• Integrated radio modem interface
• Deployed from “boogie board”
• Discharge computation software runs on WinCE (PocketPC)
• Discharge is computed in real time, post-processing can be done at the office (review of data, velocity profiles)
Remote Controlled Boat Prototype running at 18 ft/s
SonTek FlowTracker
• Keypad
• LED display
• 2/4 MB recorder
• Similar to Aquacalc
• Measurements stored as binary file (*.wad)
Questions?
top related