1. Update of the Eurotop Manual: new insights on wave overtopping
Jentsje van der Meer
William Allsop, Tom Bruce, Julien DeRouck, Leopoldo Franco, Andreas Kortenhaus, Tim Pullen, Holger Schüttrumpf, Peter Troch, Barbara Zanuttigh

2. Contents Tolerable wave overtopping Formulae: approaches
Wave run-up on steep slopes
Wave overtopping
Slopes
Vertical structures
Very steep slopes

3. Tolerable wave overtopping
Limits for:
Structural design of breakwaters, seawalls, dikes and dams
Property behind the defence
People and vehicles

4. Influence of wave height on same discharge
A small wave height gives many but small overtopping wave volumes. A large wave height gives a few but very large overtopping wave volumes.
Video

5. 5 l/s per m for Hm0 = 1 m; Nw = 1079; Now = 234
Movie on:
or:

6. Limits for structural damage

7. Limits for property behind structure

8. Limits for people and vehicles

9. Shape parameter in Weibull distribution
EurOtop (2007): b = 0.75

10. Different approach of formulae in EurOtop (2016)
Mean value approach. Use the formula as given with the mean value of the stochastic parameter(s). This should be done to predict or compare with test data. Model factor m (often a coefficient) is given with σ(m).
In EurOtop (2007) probabilistic design;
Design or safety assessment approach. This is an easy semi-probabilistic approach (partial safety factor); this is the mean value approach above, but now with the inclusion of the uncertainty of the prediction: m = μ(m) + σ(m);
In EurOtop (2007) deterministic design;
Probabilistic approach. Consider the stochastic parameter(s) with their given standard deviation and assuming a normal or log-normal distribution;
The 5%-exceedance lines, or 90%-confidence band, can be calculated by using μ(m) ± 1.64σ(m) for the stochastic parameter(s).

11. Different approaches

12. Wave run-up on steep slopes (new)

13. Wave run-up on steep slopes (new)
Very shallow foreshores
What about very steep slopes?
Use new overtopping formulae.

14. From slopes to vertical; various cotα; sm-1,0=0.04

15. cotα = 10; 6; 4; 3; 2; 1.5; 1.0; 0.5; 0.33; 0.25

16. cotα = 10; 6; 4; 3; 2; 1.5; 1.0; 0.5; 0.33; 0.25

17. cotα = 10; 6; 4; 3; 2; 1.5; 1.0; 0.5; 0.33; 0.25

18. cotα = 10; 6; 4; 3; 2; 1.5; 1.0; 0.5; 0.33; 0.25

19. cotα = 10; 6; 4; 3; 2; 1.5; 1.0; 0.5; 0.33; 0.25

20. cotα = 10; 6; 4; 3; 2; 1.5; 1.0; 0.5; 0.33; 0.25

21. cotα = 10; 6; 4; 3; 2; 1.5; 1.0; 0.5; 0.33; 0.25

22. cotα = 10; 6; 4; 3; 2; 1.5; 1.0; 0.5; 0.33; 0.25

23. cotα = 10; 6; 4; 3; 2; 1.5; 1.0; 0.5; 0.33; 0.25

24. cotα = 10; 6; 4; 3; 2; 1.5; 1.0; 0.5; 0.33; 0.25

25. Influence of slope angle for overtopping

26. Wave run-up for very steep slopes

27. Overtopping over sloping structures
Slopes: up to zero freeboard
Maximum

28. More insight in overtopping formulae
Vertical walls: three situations
No h*
Allsop et al., 1995
Franco et al., 1998

29. Vertical structures No influencing foreshore:
Influencing foreshore, non-impulsive:
Influencing foreshore, impulsive:
valid for 0 < Rc/Hm0 < 1.35
valid for Rc/Hm0  1.35

30. Thank you!