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Journal of Ocean University of China

, Volume 16, Issue 4, pp 649–654 | Cite as

Energy dissipation within the wave run-up at stepped revetments

  • Nils B. Kerpen
  • Daniel B. Bung
  • Daniel Valero
  • Torsten Schlurmann
Article

Abstract

To understand the processes and energy dissipation performance caused by turbulence during the wave run-up over a stepped revetment, hydraulic model tests with steady flow conditions are conducted and correlated with unsteady flow conditions of the wave run-up within a short time frame. Under irregular waves, the run-up reduction over a stepped revetment is dependent on the Iribarren number and decreases for decreasing Iribarren numbers. Velocity gradients are found to be similar in a steady and unsteady flow regime near the pseudo-bottom.

Key words

run-up stepped revetment roughness energy dissipation 

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Notes

Acknowledgements

The present work is part of the joint research project ‘waveSTEPS’ funded by the German Federal Ministry of Education and Research (BMBF) through the German Coastal Engineering Research council (KFKI, 03KIS108 and 03KIS119). The authors gratefully acknowledge the support of the experimental work by Kornelius Müller within the wave flume experiments and Jochen Vogel within the current flume experiments.

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Copyright information

© Science Press, Ocean University of China and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Nils B. Kerpen
    • 1
  • Daniel B. Bung
    • 2
  • Daniel Valero
    • 2
  • Torsten Schlurmann
    • 1
  1. 1.Ludwig-Franzius-InstituteLeibniz Universität HannoverHannoverGermany
  2. 2.Hydraulic Engineering SectionFachhochschule AachenAachenGermany

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