Wave run-up on the Zeebrugge rubble mound breakwater: full-scale measurement results versus laboratory results
De Rouck, J.; Van de Walle, B.; Troch, P.; van der Meer, J.W.; Van Damme, L.; Medina, J.R.; Willems, M.; Frigaard, P. (2007). Wave run-up on the Zeebrugge rubble mound breakwater: full-scale measurement results versus laboratory results. J. Coast. Res. 23(3): 584-591. https://dx.doi.org/10.2112/04-0157A.1
In: Journal of Coastal Research. Coastal Education and Research Foundation: Fort Lauderdale. ISSN 0749-0208; e-ISSN 1551-5036, meer
A clear difference between full-scale wave run-up measurements and small-scale model test results had been noticed during a MAST II project. This finding initiated a thorough study of wave run-up through the European MAST III OPTICREST project. Full-scale measurements have been carried out on the Zeebrugge rubble mound breakwater. This breakwater has been modeled in three laboratories: two 2D models at a scale of 1 : 30 and one 3D model at a scale of 1 : 40 have been built at Flanders Hydraulics (Belgium), at Universidad Politécnica de Valencia (Spain), and at Aalborg University (Denmark). Wave run-up has been measured by a digital run-up gauge. This gauge has proven to measure wave run-up more accurately than the traditional wire gauge. Wave spectra measured in Zeebrugge have been reproduced in the laboratories. Results of small-scale model tests and full-scale measurement results have been compared. This comparison confirmed the MAST II outcome: wave run-up is underestimated by small-scale model tests. The difference between full-scale measurement results and small-scale model test results is the result of model effects. The porosity of the armor layer has a significant influence on wave run-up and may explain the dependency of wave run-up on the water level observed in Zeebrugge. An influence of the spectral shape has also been noticed.
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