Reduction of maximum tsunami run-up due to the interaction with beachfront development – application of single sinusoidal waves
Experiments are presented that focus on the interaction of single sinusoidal long waves with beachfront development on the shore. A pump-driven methodology is applied to generate the tested waves in the wave flume. The approaching waves firstly propagate over a horizontal bottom, then climbing up a...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2013-11-01
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| Series: | Natural Hazards and Earth System Sciences |
| Online Access: | http://www.nat-hazards-earth-syst-sci.net/13/2991/2013/nhess-13-2991-2013.pdf |
| Summary: | Experiments are presented that focus on the interaction of single sinusoidal
long waves with beachfront development on the shore. A pump-driven
methodology is applied to generate the tested waves in the wave flume. The
approaching waves firstly propagate over a horizontal bottom, then climbing
up a 1 in 40 beach slope. The experiments reported here are confined to the
surf similarity parameter of the waves ranging from ξ =7.69–10.49. The
maximum run-up of the tested waves under undisturbed conditions agrees well
with analytical results of
of Madsen and Schäffer (2010).
Beachfront development is modelled with cubic concrete blocks
(macro-roughness (MR) elements). The obstruction ratio, the number of element
rows parallel to the shoreline as well as the way of arranging the MR
elements influences the overall reduction of maximum run-up compared to the
undisturbed run-up conditions. Staggered and aligned as well as rotated and
non-rotated arrangements are tested. As a result, nomograms are finally
compiled to depict the maximum run-up reduction over the surf similarity
parameter. In addition, some guidance on practical application of the
results to an example location is given. |
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| ISSN: | 1561-8633 1684-9981 |