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Airborne Lidar Mapping of Beach Changes: Techniques and Applications

Learn about Airborne Lidar Mapping and Differential GPS Navigation for studying beach changes, with a focus on equipment, data resolution, and validation methods. This comprehensive overview covers the use of Lidar surveys, in-situ beach surveys, and modeling to measure seasonal changes and volumes in beach and cliff elevations.

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Airborne Lidar Mapping of Beach Changes: Techniques and Applications

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  1. Airborne Lidar Mapping of Beach Changes Dick Seymour Scripps Institution of Oceanography

  2. What is Airborne Lidar Mapping?

  3. Differential GPS Navigation

  4. Airborne Lidar Equipment In addition to the scanner, includes on-board data storage, digital camera bore-sighted with the lidar, inertial motion sensors and GPS system

  5. Typical Mapping Coverage Altitude 1000 m Span ~700 m Resolution 1 sq m Vertical Accuracy ~10 cm

  6. Validating Vertical Accuracy

  7. Dana Point Dana Point LIDAR Resolution In this view, the returns have been averaged to produce a pixel about 70 cm square.

  8. SCBPS at SIO Southern California Beach Processes Study Sponsors: U.S. Army Corps of Engineers Calif. Dept. of Boating & Waterways P.I.s: Bob Guza, Bill O’Reilly, Dick Seymour Lidar Surveys, In-Situ Beach Surveys, Modelling

  9. SCBPS Lidar Surveys Semi Annual Spring/Fall to capture extremes of erosion and accretion

  10. Measuring Seasonal Changes

  11. Torrey Pines Beach

  12. Beach and Cliff Elevations

  13. Beach Fill Volume Determination

  14. Property Boundary Determination

  15. WetlandsStudies

  16. River Valleys and Border Lands

  17. Illegal SandMovement Pre and post surveys gave accurate volumes

  18. City Level Web Products Regional Level Beach Level Profile Level http://cdip.ucsd.edu/SCBPS

  19. Global Warming Scary Stuff

  20. Side-look Lidar for Cliff Erosion

  21. Insitu Surveys Monthly: Low tide above waterline (exposed beach). Twice/Year: Extend to 8m depth TorreyPines San Onofre

  22. Surfzone Imaging Low Swell 1.5m Hs 20 s period

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