Transcript Internal ADCP Lunchtime Presentation

Acoustic Doppler Current Profiler
Technology
December 20, 2005
Trevor Lykens, Tim Sisk, Chris Tomichek
Acoustic Doppler Solutions
Introduction to ADCP Technology
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Acoustic Doppler Solutions
What is ADCP?
 Acoustic Doppler Current Profiler
 What does it measure?
 How does it measure?
Why use an ADCP?
Who uses ADCP’s?
How much does it cost?
Why did we use ADCP recently?
What is an ADCP?
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Acoustic Doppler Current Profiler
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Works like the radar gun
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Uses sound to make measurements …
 SONAR (like RADAR in air)
SOund NAvigation & Ranging
Acoustic Doppler Solutions
What Does It Measure?
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ADCPs measures 3F’s
1. How fast? … speed, velocity
2. How far?… distance, range, depth
3. How full? … volume
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WHILE MOVING!!!!
Acoustic Doppler Solutions
How Does It Measure?
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ADCP
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Acoustic Doppler Solutions
Uses Beams to Measure Water in Motion
Discharge / Velocity
Measurement
Distance = 150 ft
0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.8 1.0 1.0 1.0 1.0 0.9 0.8 0.7 0.6 0.4 0.2
0.2 0.3 0.4 0.5 0.6 0.6 0.8 0.8 1.0 1.0 1.0 1.0 0.8 0.8 0.7 0.4 0.3 0.1
0.1 0.3 0.4 0.5 0.5 0.6 0.7 0.7 0.9 0.9 0.9 0.9 0.8 0.7 0.6 0.3 0.2 0.4
0.3 0.3 0.4 0.4 0.5 0.5 0.5 0.7 0.7 0.7 0.7 0.6 0.5 0.4 0.2
0.2 0.3 0.3 0.3 0.4 0.4 0.4 0.5 0.5 0.5 0.5 0.5 0.4 0.3
0.
4
0.2 0.2 0.3 0.3 0.3 0.4 0.4 0.4 0.4 0.4 0.4
0.4 0.2 0.2 0.2 0.2 0.2 0.2
Acoustic Doppler Solutions
Why Use an ADCP?
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Acoustic Doppler Solutions
Moving Discharge / Velocity Measurement
 Much faster than traditional means. Improves
efficiency, saves money (one run <5 min)
Highly accurate measurements
Hundreds of readings made per pass
 More measurements for peace of mind with
data quality
Who Uses ADCPs?
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Acoustic Doppler Solutions
USGS
Army Corps of
Engineers
State/Federal Agencies
Universities
Irrigation Districts
Defense Contractors
Consultants
ADCPs…
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Acoustic Doppler Solutions
Can measure quickly from bridges or pulley
system
 Avoids pitfalls of user in the water
No Maintenance cost
 Save time and money in maintaining the
instrument
Lower overall cost
 Save time and money
Applications
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Acoustic Doppler Solutions
Measuring Discharge
Wave studies
Sediment Transport
Studies
Scour and erosion
studies
Bathymetry Mapping
IFIM Studies
How Much Does It Cost?
(RDI Instruments ADCP Cost Table Through CT Vendor)
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Purchase Price
Rental
per week
$23,000
$960
Stream Pro:
Used in small streams and brooks
(3 in – 6.5 ft)
Comes with custom mount
$15,000
$600
Sentinel:
Used in canals and larger rivers
(Distance Varies)
Permanently mounts on bottom or side
$19,000
$750
Rio Grande:
Used in larger rivers and streams
(1.5 ft – 225 ft).
Typically mounted on boat
Acoustic Doppler Solutions
Rio Grande 1200kHz
Measures from 1.5-ft. to 60-ft.
Most versatile unit
Mounts to a boat or Trimaran
Software very easy to use
Very Accurate
Acoustic Doppler Solutions
Rio Grande 600kHz
Measures from 3.5-ft. to 225-ft.
Mounts to a boat or Trimaran
Software very easy to use
Very Accurate
Acoustic Doppler Solutions
Rio/Stream-Pro In Action
Acoustic Doppler Solutions
ADCP: Stream-Pro
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Permits more effective
measurement methods in
shallower depths of 4 in – 6.5 ft
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Measures currents from top to
bottom at the same instant – 2 in
resolution or even finer
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Bottom-tracking capability allows
moving across stream
continuously
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Safer: avoids operator in the water
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Convenient: wireless link permits
flexible operation from shore,
bridge, & cableway
Acoustic Doppler Solutions
WinRiver Software
 Setup Wizard
 Depth
 Boat Speed
 Water Speed
 Bottom Type
 No Need to Memorize Commands
Acoustic Doppler Solutions
WinRiver User Interface Screen
Acoustic Doppler Solutions
Creates Reports
Acoustic Doppler Solutions
Our Recent Application
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Acoustic Doppler Solutions
ConEd – West Springfield Station in Mass.
10 Transects across the Connecticut River
 Bathymetry
 Velocities
 Total flow
Rented Rio-Grande 1200 kHz unit
 Fabricated mount for our boat
 Laptop data collection
Why Did We Use ADCP
Technology?
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Client required by NPDES permit to perform a
thermal plume study of discharge effects at West
Springfield Station
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Efficient means to gather bathymetric, velocity, and
therefore flow data
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Relatively inexpensive (see cost table)
Acoustic Doppler Solutions
• WSS Intake
• Unit 1&2 Discharge
• Unit 3 Discharge
• Mouth of Mill River
• Sewage effluent Discharge
• Mouth of Westfield River
West Springfield Transects
Acoustic Doppler Solutions
Study Results
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Acoustic Doppler Solutions
Performed 10 transects in the CT River in <4 hrs
Calculated cumulative flow in river was within ~5% at
all transects
 Very rainy day with pulsing inflows
Collected data is being incorporated into Thermal
Plume hydraulic modeling (John Richardson @ Blue
Hill Hydraulics)
 Output was simple text file
 Also can have ASCII output files
 Create own output reports or graphs with
WinRiver
The ADCP was very User-Friendly
ADCP Summary
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ADCP Technology is accepted by academia, state and
federal agencies, etc.
Relatively inexpensive and produces quality data
Multiple ADCP models make the technology very
versatile (Resolution, Depth, etc.)
Very user-friendly software and tech support
 RDI has 24/7 Telephone Support
 RDI University (take classes on line for free)
Acoustic Doppler Solutions
Questions?
For more info contact Chris Tomichek,
Tim Sisk, or Trevor Lykens
Acoustic Doppler Solutions