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- [ONLINE] ED41A-VR8907: Utilizing UAVs to Monitor Coastal Change
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Andrea Powao, GeoFORCE (First Author, Presenting Author)
Carissa Morin, GeoFORCE
Dylan Chumley, GeoFORCE
Chelsea Tapia, GeoFORCE
Timothy Goudge, University of Texas at Austin
Mariel Nelson, University of California Berkeley
Coastlines face more dramatic change as sea levels rise and storms intensify. Erosion and deposition rates vary greatly; for example, Bryant Beach shifted 2 m in just two years, while Sargent Beach receded ~500 m from 1943 to 2023. Monitoring coastal change is as crucial as ever, as it expands our understanding of beach and geological shifts, and enables identifying high‑risk areas to establish warning zones. These zones protect sensitive habitats, valuable infrastructure, and local communities. Our research evaluated such methods of monitoring, which is UAV-mounted LiDAR, which scans terrain using infrared to detect elevation, and UAV‑based imaging processed via Structure‑from‑Motion (SfM) to generate 3D topography. LiDAR proved the most reliable method as it easily revealed dune growth, shoreline movement, and vegetation changes, all indicative of increased coastal stability. This study shows that LiDAR offers high‑resolution, early detection of coastal change, making it a reliable tool for coastal management.
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