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Department of Civil Engineering Ghent University Experimental study of overtopping behavior of steep low-crested coastal structures David GALLACH-SÁNCHEZ, Peter TROCH, Andreas KORTENHAUS
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Department of Civil Engineering
Ghent University
Experimental study of overtopping behavior
of steep low-crested coastal structures
David GALLACH-SÁNCHEZ, Peter TROCH, Andreas KORTENHAUS
Department of Civil Engineering
Ghent University4
ConclusionsIntroduction UG13 UG14Literature Experiments
Wave overtopping concepts
Literature review
New experiments
at Ghent University
Dataset UG13
Dataset UG14
Department of Civil Engineering
Ghent University5
ConclusionsIntroduction UG13 UG14Literature Experiments
Wave overtopping concepts
q (average overtopping rate)
Hm0 (Wave height)
Tp (Wave period)
𝛼 (Slope angle)
Rc (Freeboard)
Department of Civil Engineering
Ghent University6
Introduction ConclusionsUG13 UG14Literature Experiments
EurOtop (2007) formula has
a limited range of applicationq
gHm03
= 0.2 exp −2.6RcHm0
Not depending
on slope angle
Slope
Relative
freeboard
Range of application
Mild Steep Very
steep
Vertical
wall
Large Small Very
small
Zero
Standard
conditions
Knowledge gap
Department of Civil Engineering
Ghent University7
Introduction ConclusionsUG13 UG14Literature Experiments
Van der Meer & Bruce (2014) formula
has an extended range of applicationq
gHm03
= A ∙ exp − BRcHm0
1.3 New!
Depending on slope angle
Range of application
Slope
Relative
freeboard
Mild Steep Very
steep
Vertical
wall
Large Small Very
small
Zero
Department of Civil Engineering
Ghent University8
Introduction ConclusionsUG13 UG14Literature Experiments
There is still a knowledge gap
to be covered
Lack of overtopping data for (very) steep slopes
Very few overtopping data for very small and zero freeboard
No information about differences between
deep water and shallow water overtopping performance
Check on overtopping prediction formulae
EurOtop (2007)
Van der Meer & Bruce (2014)
Department of Civil Engineering
Ghent University9
Introduction ConclusionsUG13 UG14Literature Experiments
To improve overtopping knowledge
we performed tests at Ghent University
Department of Civil Engineering
Ghent University10
Introduction ConclusionsUG13 UG14Literature Experiments
To improve overtopping knowledge
we performed tests at Ghent University
Overtopping box
Based on the weigh cell technique
Developed by Victor & Troch (2010)
Department of Civil Engineering
Ghent University11
Introduction ConclusionsUG13 UG14Literature Experiments
UG13 and UG14 extend the knowledge
towards steep low-crested structures
UG13 UG14
Slopes Mild Vertical walls Mild Vertical walls
Crest freeboard Large Zero Large Zero
Water deepness Deep water Shallow water
Department of Civil Engineering
Ghent University12
Introduction ConclusionsUG13 UG14Literature Experiments
UG13 and UG14 improve
the overtopping knowledge
EurOtop (2007) formula needs an update
Van der Meer & Bruce (2014) formula fits well but
underpredicts overtopping for zero freeboard
Shallow water effects produce an increase
of overtopping for large relative freeboards
Next steps:
Individual wave overtopping volumes of UG13 and UG14
More tests on shallow water conditions
Department of Civil Engineering
Ghent University
Experimental study of overtopping behavior
of steep low-crested coastal structures
David GALLACH-SÁNCHEZ, Peter TROCH, Andreas KORTENHAUS
