2022 Volume 78 Issue 2 Pages I_1177-I_1182
In recent years, the development of 3D data collected by airborne lidar survey and airborne bathymetric lidar survey have been promoted, and 3D data of various mesh sizes have become available. We examined the applicability to these hydraulic analysis and examined the index for selecting the mesh size corresponding to the required accuracy regardless of the river scale. In ALB survey, river bottom data as well as river topo data may be missing due to the influence of vegetation, water depth, and water quality. And the gap between the interpolated topography and the actual topography becomes large, especially in mountain rivers with severe undulations. Therefore, we focused on topographical features, examined the effect of missing ALB data on the calculated water level in hydraulic analysis, and clarified the mechanism.
PROCEEDINGS OF HYDRAULIC ENGINEERING
