WAVE RUN-UP SIMULATIONS ON REAL DIKES

Proceedings of the International Conference on Coastal Engineering

Andre van Hoven¹  Gosse Jan Steendam²  Astrid Labrujere³  Jentsje Wouter van der Meer⁴ 

[1] Deltares;Infram;Rijkswaterstaat Centre for Water Management;Van der Meer Consulting bv and UNESCO-IHE

关键词: wave run-up;    wave overtopping;    hydraulic simulator;    grass cover;    dike;    levee;    breach;   

DOI  :  10.9753/icce.v35.structures.42

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

A new Wave Run-up Simulator has been designed, constructed, calibrated and used for testing of the seaward face of dikes. The upper part of dikes or levees often have a clay layer with a grass cover. The new device is able to test the strength of the grass cover under simulation of up-rushing waves for pre-defined storm conditions. The cumulative overload method has been developed to describe the strength of grass covers on the crest and landward side of dikes, for overtopping wave volumes. In essence there is not a lot of difference between the hydraulic load from an overtopping wave volume or from an up-rushing wave. Therefore the hypothesis has been evaluated that the cumulative overload method should also be applicable for up-rushing waves. Tests on a real dike have been used to validate this hypothesis. The main conclusions are that the new Wave Overtopping Simulator works really well, but that the results on testing till so far has not yet been sufficient for a full validation of the method. More research is required. Furthermore, a new technique has been developed to measure the strength of a grass sod on a dike: the grass pulling device. Tests with this device showed that it is possible to measure the critical velocity (= strength) of a grass cover, which is much easier than performing tests with a Wave Run-up or Overtopping Simulator.

【 授权许可】

CC BY