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GEOPHYSICAL HYDRAULICS

MARITIME HYDRAULICS

Impulse wave - wave propagation (7)

This photo shows a subaerial landslide generated impulse wave in a hydraulic model at VAW. The wave profiles are measured with Capacitance Wave Gages CWG. The test parameters are:

still water depth

0.300 m

slide thickness

0.235 m

slide impact velocity

6.66 m/s

bulk slide volume

0.0334 m3

bulk slide density

1,634 kg/m3

grain density

2,745 kg/m3

slide mass

54.6 kg

grain diameter

4 mm

slide impact angle

90°

slide width

0.500 m

The primary impulse wave is at about 6.5 m away from the slide impact location. Subaerial landslide generated impulse waves decay fast which may be observed from the wet back wall zone.

[Reference: Heller, V. (2007). Landslide generated impulse waves - Prediction of near field characteristics. Ph.D. Thesis 17531, ETH Zurich, Zurich (http://e-collection.ethbib.ethz.ch/cgi-bin/show.pl?type=diss&nr=17531).]

© Laboratory of Hydraulics, Hydrology and Glaciology (VAW), Swiss Federal Institute of Technology Zurich, Switzerland