SPATIOTEMPORAL MEASUREMENT OF WATER SURFACE AND BED ELEVATION WITH MOVING OPTICAL CUTTING METHOD

Abstract

This paper presents the novel spatiotemporal measuring technique for water surface and bed elevation on flume experiments as movable bed. This method is application of optical cutting method, moving laser beam as a light source at high speed to measure water surface and bed elevation in high spatiotemporal resolution with contactless. The characteristics of this measurement are effective to elucidate physical mechanism of sand waves often show high frequency undulation and unsteady movement. This study applied the measurement to flume experiments, the measured results are well.