Experimental study on the overtopping behaviour of steep slopes - Transition between mild slopes and vertical walls

Lander Victor, Peter A Troch

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Extensive knowledge is available on the overtopping behaviour of traditional smooth impermeable sea defence structures, such as mildly sloping dikes and vertical walls, both typically featuring a high crest freeboard to reduce wave overtopping. A particular design application emerges in the development of wave energy converters of the overtopping type, where maximisation of wave overtopping is required, i.e. smooth impermeable steep sloping structures with low crest freeboards subjected to non-breaking waves. To date, only relatively limited knowledge is available on the overtopping behaviour of those structures. In this study, the average overtopping rate obtained from new experiments has been analysed and compared with existing prediction methods. This study contributes to a better knowledge on the overtopping behaviour of the steep low-crested structures, which is positioned in between that of mildly sloping dikes and vertical walls on the one hand, and in between that of structures with zero crest freeboards and relatively large crest freeboards on the other hand. The existing prediction methods seem unable to predict the significant effects of the slope angle and small relative crest freeboards on the average overtopping rate accurately. Therefore, a new set of prediction formulae is proposed based on the new experiments combined with existing data from literature. These formulae include wave overtopping at vertical walls subjected to non-impacting waves and at structures with zero crest freeboard.

Original languageEnglish (US)
Title of host publicationProceedings of the Coastal Engineering Conference
StatePublished - 2012
Externally publishedYes
Event33rd International Conference on Coastal Engineering 2012, ICCE 2012 - Santander, Spain
Duration: Jul 1 2012Jul 6 2012

Other

Other33rd International Conference on Coastal Engineering 2012, ICCE 2012
CountrySpain
CitySantander
Period7/1/127/6/12

Fingerprint

overtopping
experimental study
Levees
dike
prediction
Experiments
slope angle
wave energy
experiment

Keywords

  • Low crest freeboard
  • Non-breaking waves
  • Steep slope
  • Wave overtopping

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Ocean Engineering
  • Oceanography

Cite this

Experimental study on the overtopping behaviour of steep slopes - Transition between mild slopes and vertical walls. / Victor, Lander; Troch, Peter A.

Proceedings of the Coastal Engineering Conference. 2012.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Victor, L & Troch, PA 2012, Experimental study on the overtopping behaviour of steep slopes - Transition between mild slopes and vertical walls. in Proceedings of the Coastal Engineering Conference. 33rd International Conference on Coastal Engineering 2012, ICCE 2012, Santander, Spain, 7/1/12.
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