Abstract
Due to the remarkable development of UAV in recent years, the application in river engineering increases widely mainly for the measurement of river topography. However, UAV has not been used for river flow measurements. Therefore, aerial STIV (Space-Time Image Velocimetry) technique has been developed that utilizes the stabilized video images and further the STVV (Space-Time Volume Velocimetry) was devised to obtain two-dimensional velocity fields from the video images shoot from UAV. In this study, the effectiveness of STVV was investigated via the comparison with the other measurement techniques while measuring the river reach of about 1km of the snowmelt flood of the Shinano River that contains curved flow and pier effects.
