bryce molder & paul villard - trieca conference...bryce molder & paul villard geo morphix...
TRANSCRIPT
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Bryce Molder & Paul VillardGEO Morphix Ltd.
Unmanned Aerial Vehicles as a Tool forMonitoring and EvaluatingNatural Channel Designs
TRIECA ConferenceMarch 20-21, 2019
Pearson Convention Centre, Toronto
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1. Background
2. UAV Applications
3. Limitations
4. Conclusions
ESC monitoringMonitoring NCD’sTopographical surveysSpecialized applications
Vegetation / WaterWeather
SummaryNext stepsFlying requirements
UAVHow it functions
OUTLINE
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BACKGROUND
• DJI Phantom Vision 2+• DJI Phantom 4 Pro• HD Playback• Flight Time: 15 mins• Flight Speed: < 10 m/s
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HOW IT FUNCTIONS
• Photogrammetry• Generate 3D models from 2D photos
taken at different angles• Processing Softwares
• Pix 4D• PrecisionMapper
BACKGROUND
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• PIX4D screenshot
BACKGROUNDHOW IT FUNCTIONS
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BACKGROUNDHOW IT FUNCTIONS
1000 m of channel
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UAV APPLICATIONS
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UAV APPLICATIONSESC MONITORING
Easy Identification of…
325 m
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UAV APPLICATIONSESC Monitoring
Aerial Perspective
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UAV APPLICATIONSESC MONITORING
Ground Perspective
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UAV APPLICATIONS
MONITORING NCD’s
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UAV APPLICATIONS
MONITORING NCD’s
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UAV APPLICATIONS
MONITORING NCD’s
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UAV APPLICATIONS
MONITORING NCD’s
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• Informing ESC plans• As-builts• Geomorphological monitoring (e.g., erosion)
UAV APPLICATIONS
SURVEYS
• Photo resolution• Ground Sampling Distance <-> Altitude (20 – 50 m)• Use and distribution of Ground Control Points
(surveyed with RTK)
Accuracy
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UAV APPLICATIONS
SURVEYS
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UAV APPLICATIONS
SURVEYS
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19
UAV APPLICATIONS
SURVEYS
RMS = 0.11Mean = 0.09
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UAV APPLICATIONS
SURVEYS
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UAV APPLICATIONS
SURVEYS
Max = 0.14Min = 0.004RMS = 0.07
Mean = 0.06
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UAV APPLICATIONS
SURVEYS
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UAV APPLICATIONS
OTHER APPLICATIONS
• Stockpile / Volume estimation• Material availability
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UAV APPLICATIONS
OTHER APPLICATIONS
• Stockpile / Volume estimation• Vegetation I.D. (multispectral camera)• Groundwater inputs (thermal infrared camera)
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LIMITATIONS
• Weather (wind, rain)• Vegetation cover and water surface (Supplement
survey with RTK, LiDAR)• Range of operation (flight time, communication
distance)• Low precision without GCPs• Flying requirements (e.g., permits, privacy etc.)
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CONCLUSIONS• Affordable• Efficient (rapid surveys with good coverage)• Birds-eye perspective facilitates review of corridor
conditions / ESC• Steep slopes
NEXT STEPS• Compare Photogrammetry software• Develop UAV inspection / survey standards
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FLYING REQUIREMENTS
• SFOC Special Flight Operations Certificate
• Flight Training• 100 ft distance to people,
buildings, etc.• Flight Log• Contact Air Control Centres
in case of emergency• Blowhorn, fire extinguisher
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THANK YOU
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