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

Lander Victor, Peter Troch

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

3 Scopus citations

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 33rd International Conference on Coastal Engineering 2012, ICCE 2012
PublisherAmerican Society of Civil Engineers (ASCE)
ISBN (Print)9780989661119
DOIs
StatePublished - 2012
Externally publishedYes
Event33rd International Conference on Coastal Engineering 2012, ICCE 2012 - Santander, Spain
Duration: Jul 1 2012Jul 6 2012

Publication series

NameProceedings of the Coastal Engineering Conference
ISSN (Print)0161-3782

Other

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

Keywords

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

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Ocean Engineering
  • Oceanography

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  • Cite this

    Victor, L., & Troch, P. (2012). Experimental study on the overtopping behaviour of steep slopes - Transition between mild slopes and vertical walls. In Proceedings of the 33rd International Conference on Coastal Engineering 2012, ICCE 2012 (Proceedings of the Coastal Engineering Conference). American Society of Civil Engineers (ASCE). https://doi.org/10.9753/icce.v33.structures.61