Abstract
Wave overtopping discharges at coastal structures are well described in the EurOtop Manual (2007), including the distribution of overtopping wave volumes. Each volume that overtops a dike or levee will have a certain flow velocity and depth record in time, often given by the maximum velocity and flow depth. This paper describes some further development of the theory on flow depth and velocities on the crest, but will also show an inconsistency with respect to the mass balance. The second part of the paper gives an analysis of measured values on real dikes, simulated by the Wave Overtopping Simulator. It gives also the method of "cumulative hydraulic load" to compare overtopping discharges for different wave conditions. A large wave height with less overtopping waves, but larger overtopping wave volumes, is more damaging than a small wave height with more, but smaller overtopping volumes, even if the overtopping discharge is similar. The reasons to develop the cumulative hydraulic load have been compared with the recently in the US developed method of erosional equivalence.
Highlights
Small and large scale model testing is often applied to measure wave overtopping at coastal structures
This paper presents the "cumulative hydraulic load" and this has been compared with the developed theory on "erosional equivalence" by Dean et al (2010)
More research is required to solve this discrepancy and probably the flow depth and velocity must become more dependent on wave period
Summary
Small and large scale model testing is often applied to measure wave overtopping at coastal structures. The Wave Overtopping Simulator (Van der Meer et al 2006, 2007, 2008, 2009) simulates the overtopping wave tongues at the crest of a real dike and the development has been based on existing theory of flow depths and flow velocities. It appears, that this existing theory leads to a discrepancy and this discrepancy will be described in the paper. It is not easy to measure flow depth and flow velocity in reality on a dike as the flow is very turbulent and a lot of air is entrapped This is in contrast to small scale model testing. This paper presents the "cumulative hydraulic load" and this has been compared with the developed theory on "erosional equivalence" by Dean et al (2010)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
