PROPOSAL OF EVALUATION METHOD ON FULL SECTION FISHWAY USING 3D POINT CLOUD MODEL

Abstract

 We proposed a method to evaluate the function of a full-section fishway using a 3D point cloud model created from aerial photographs taken by a UAV. In this study, we were able to quickly assess the current condition of the drop-off between fishway pools, which is an important factor in the function of a fishway, and evaluate the potential for fish migration. The area of the pools, the angle of the water vein in each pool and the number of water vein, and the number of inflow and outflow pools, which contribute to securing various migration routes in the full-section fishway, were evaluated for the diversity of upstream routes in the fishway. It was concluded that this method can evaluate the function of the fishway from the viewpoint of the physical environment, and that it is easy to evaluate the ease of fish migration in the fishway.