Geometrical estimation of water spouts from the digital information recorded on the photographs

Abstract

The process of the geometrical estimation of water spouts from the digital information recorded on the photographs is explained in detail. As an example, a pair of water spouts appeared on the sea in eastern Muroran-city on January 4, 2008 is taken up. As a result, the following results are obtained. The water spouts were formed on the sea about 10,200m away from Itanki-beach. The heights of them and their interval were about 460m and 480m, respectively. The widths of the splash of them were about 40m near the sea surface.