Two new publications on the interaction of waves and revetments

16/12/2020

Revetments protect dikes from erosion caused by waves and currents and thus are an essential element of flood and storm surge protection. Due to a limited understanding of the wave-structure-interaction, the design of the mortar-grouted riprap revetment (MGRR), which is frequently build on the North Sea coast, is yet solely based on empirical knowledge.

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  wave running up on a revetment Copyright: IWW

Crack formation due to tensile bending stresses

On the topic of crack formation due to tensile bending stresses in Mortar-Grouted Riprap Revetments, which is a major damage mechanism, the article "Tensile Bending Stresses in Mortar-Grouted Riprap Revetments Due to Wave Loading" was published in the Journal of Marine Science and Engineering. In it, full-scale hydraulic model tests are used to describe the wave loading. Subsequently, the tensile bending stresses are calculated with a structural model. Click here to go directly to the publication.

Wave run-up on revetments

Another important parameter in dike design is the wave run-up height, which is used to determine the crest height and the number of overtopping waves. Mortar-Grouted Riprap Revetments significantly reduce the wave runup height compared to an impermeable and smooth revetment. Thus, an improved prediction of the previously unquantified wave run-up height for Mortar-Grouted Riprap Revetments contributes to an economical and safe design. Together with the Department of Hydromechanics, Coastal and Ocean Engineering of the Leichtweiß-Institute for Hydraulic Engineering and Water Resources, the article "Wave Run-Up on Mortar-Grouted Riprap Revetments" was published in the journal "Water". Click here to go directly to the publication.