Measurement of the 2011 Tohoku Tsunami Flow Velocity by the Aerial Video Analysis

Abstract

Tsunami flow velocity is important for understanding how tsunami penetrates inland and improving tsunami numerical models, though it is difficult to measure inland tsunami flow velocity. In this paper, in order to measure tsunami flow velocities and the tsunami flow characteristics, the authors analyzed the aerial video by 2-D projective transformation and mapping on GIS. Finally, we compared measured velocities with calculated ones by tsunami numerical analysis and verified its accuracy.