Continuously operating dune-mounted lidar system at the Field Research Facility : a report detailing lidar collection, processing, evaluation, and product development
Brodie, Katherine L.; Dyer, A. Tristan.; Spore, Nicholas J.; Slocum, Richard K.; O’Dea, Annika M.; Whitesides, E. Tucker.; Renaud, Alexander D.
The Coastal and Hydraulics Laboratory, Field Research Facility (FRF), stationary lidar tower in Duck, NC, provides hourly, high-density point cloud data of the ocean, foreshore, and dune. This report documents the system and approaches used to collect, process, and analyze the lidar data. Data collection consists of a single 30-minute linescan and three framescans collected every hour. The linescans generate a two-dimensional cross-shore timeseries of the dry beach, swash, inner-surf zone waves, and water levels. The three framescans are used to generate a three-dimensional point-cloud and digital elevation model of the dry beach, quantifying changes along 500 meters of beach. Data are processed in near-real-time using automated algorithms that translate raw data into accurate geo-referenced coordinates by co-registering all data to fixed objects. Linescan data provide quantitative measurements of beach morphology change on very short timescales (seconds to minutes), as well as time-series statistics that include wave run-up elevations, inner-surf zone waves, and setup. This system improves upon the FRF capacity to observe the beach and surfzone onshore of the sandbar in near-real-time. These measurements will therefore serve as a crucial component of the FRF Coastal Model Testbed, providing detailed morphological and hydrodynamic observations at the shoreline.
Coastal and Hydraulics Laboratory (U.S.)Engineer Research and Development Center (U.S.)
Coastal engineering; Data collection platforms; Electronic data processing; Optical data processing; Optical radar
Special Report (Engineer Research and Development Center (U.S.)) ; no. ERDC/CHL SR-18-3
Approved for Public Release; Distribution is Unlimited