Wave overtopping and scale effects

Experimental case study New Afsluitdijk

Master thesis (2019)

Authors

N. Huppes Civil Engineering & Geosciences

Contributors

S.G.J. Aarninkhof Coastal Engineering - CEG (supervisor 1)
Bas Hofland Hydraulic Structures and Flood Risk - CEG (supervisor 2)
C. Kuiper Coastal Engineering - CEG (supervisor 2)
Bas Reedijk (supervisor 2)
Michael van de Koppel (supervisor 2)
Faculty
Civil Engineering & Geosciences
Copyright: © 2019 Niek Huppes
Overtopping Wave overtopping Physical modelling Experimental Afsluitdijk Roughness factor Roughness coefficient Scale effects Composite slope Levvel-blocs Xbloc+ New Afsluitdijk Physical model tests Block revetment Flume
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Published Date

30-01-2019

Language

English

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Faculty

Civil Engineering & Geosciences

Abstract

After more than 85 years, the iconic Afsluitdijk is in need of a reinforcement. During the latest safety assessment of Rijkswaterstaat the dike did not meet the standards at two components; the amount of wave overtopping (>10 l/m/s) and armour stability. This research goes into detail about the overtopping on the Afsluitdijk. In the new design a lot a of different factors influence the amount of wave overtopping: the roughness of several elements and a berm. The combination of these different factors makes it difficult to make a reliable estimation of the amount of wave overtopping. In the design new materials are used of which the effect on wave overtopping is unknown. The band width of the design is very narrow so an accurate prediction of the amount of overtopping in the prototype is necessary. Physical model tests of two different dike section are used in this research. These dike sections are tested on different scales (small to large) to validate the final design on prototype scale. Not much is known about the possible scale effects on wave overtopping so this research goes into more detail on this issue.