2025 Volume 81 Issue 16 Article ID: 24-16174
Recent advancements in remote sensing technology are enhancing the understanding of topography and particle size distribution. This study examines the effect of high-resolution topographical and particle size data from UAV on riverbed variation analysis accuracy. We conducted pre- and post-flood surveys using UAV photogrammetry and particle size investigations. Varying topographical resolution from 200m to 5m improved the average error in riverbed variation volume from 0.497m to 0.396m. Accuracy improved in areas with rapid longitudinal changes, such as sandbars. Detailed particle size distribution further reduced the error in riverbed variation volume.
