ADCP: White Point Swash
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Transcript of ADCP: White Point Swash
ADCP: White ADCP: White Point SwashPoint Swash
Amanda BettingerAmanda BettingerLindsay KarpinskiLindsay Karpinski
John Henry FrancisJohn Henry FrancisMatt DunsmoreMatt Dunsmore
Nick FischerNick FischerMSCI 311MSCI 311
December 7, 2007December 7, 2007
What is an ADCPWhat is an ADCP Acoustic Doppler Acoustic Doppler
Current ProfilerCurrent Profiler Measures wave and Measures wave and
current velocities current velocities and direction and direction through the through the specified water specified water column using an column using an acoustic signal.acoustic signal.
Eularian system Eularian system (measures at one (measures at one point over time)point over time)
Workhorse Sentinel ADCP
Study Site: White Point Study Site: White Point SwashSwash
ADCP Location
Study Site: White Point Study Site: White Point SwashSwash
ADCP Location
ADCP Set upADCP Set up
Prior to the deployment the ADCP Prior to the deployment the ADCP had to be configured in the set up had to be configured in the set up software and loaded onto the software and loaded onto the machine.machine.
The ADCP had to be tested prior to The ADCP had to be tested prior to deployment to ensure that all deployment to ensure that all function are working properly.function are working properly.
ADCP configurationADCP configuration
Blanking distance: 0.15 m (15 cm)Blanking distance: 0.15 m (15 cm) Bin size: 0.05 m (5 cm)Bin size: 0.05 m (5 cm) Sampling Frequency: 1 Hz, every 5 Sampling Frequency: 1 Hz, every 5
minsmins Deployed: 10/18/07 12:54 pm for 31 Deployed: 10/18/07 12:54 pm for 31
daysdays Pulse Coherent Mode (mode 11)Pulse Coherent Mode (mode 11)
ADCP Deployment ADCP Deployment InformationInformation
The ADCP was deployed in an The ADCP was deployed in an aluminum frame approximately 0.5 aluminum frame approximately 0.5 m x 0.5 m held down by 2 lead m x 0.5 m held down by 2 lead weights approx 50 lbs each.weights approx 50 lbs each.
The frame was buried in slightly The frame was buried in slightly under 0.5 m of sediment, under 0.5 m of sediment, approximately ¾ of the frame was approximately ¾ of the frame was buried.buried.
TroubleshootingTroubleshooting
The ADCP was originally deployed for a The ADCP was originally deployed for a 3 day period for testing purposes.3 day period for testing purposes.
Problems that were encountered Problems that were encountered include:include: It was not in the proper modeIt was not in the proper mode
Bottom Tracking was needed to recognize the Bottom Tracking was needed to recognize the surfacesurface
The surface was not being recognized by The surface was not being recognized by the instrumentthe instrument
Rods were bend/ broken that may have Rods were bend/ broken that may have caused movementcaused movement
Data ProcessingData Processing
The WinADCP program was used to The WinADCP program was used to export the data from the binary file export the data from the binary file to a convenient text file that can be to a convenient text file that can be loaded into Matlab.loaded into Matlab.
ProfilesProfiles
Data Analysis: Temperature Data Analysis: Temperature and Depthand Depth
Data Analysis: Magnitude Data Analysis: Magnitude and Direction of Velocitiesand Direction of Velocities
Data Analysis: Velocity Data Analysis: Velocity DirectionDirection
Further AnalysisFurther Analysis
Discharge rates can be calculated Discharge rates can be calculated using the magnitude and direction of using the magnitude and direction of the velocity.the velocity.
A similar procedure can be done to A similar procedure can be done to look at seasonal variability of the look at seasonal variability of the tidal influence and discharge rates.tidal influence and discharge rates.