Flow depths and velocities at crest and landward slope of a dike, in theory and with the wave overtopping simulator

Flow depths and velocities at crest and landward slope of a dike, in theory and with the wave overtopping simulator

Van der Meer, J.W.
Hardeman, B.
Steendam, G.J.
Schüttrumpf, H.
Verheij, H.J.

Civil Engineering and Geosciences

Hydraulic Engineering

2011-06-30

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.

dikes
levees
overtopping
flow depth
flow velocity
wave overtopping simulator
erosional index

http://resolver.tudelft.nl/uuid:e14f478c-dd62-42e3-9191-aeef909e0d95

32nd International Conference on Coastal Engineering, ICCE 2010, June 30 – July 5 2010, Shanghai, China

Institutional Repository

conference paper

(c) 2011 The Author(s)