Several measurement systems recorded the slide and wave properties along the channel axis. Two Laser Distance Sensors ( LDS ) scanned the slide profiles prior to impact the water body, seven Capacitance Wave Gauges (CWG) recorded the wave profiles, and Particle Image Velocimetry (PIV) was applied to determine the velocity vector fields in the slide impact zone. The wave types were determined from the wave profiles and controlled for selected tests with video recordings. Details on the physical model are given by Heller (2007).