Print Email Facebook Twitter Modelling effects of an asphalt road at a dike crest on dike cover erosion onset during wave overtopping Title Modelling effects of an asphalt road at a dike crest on dike cover erosion onset during wave overtopping Author Bomers, A. (University of Twente) Aguilar Lopez, J.P. (TU Delft Water Resources; University of Twente) Warmink, JJ (University of Twente) Hulscher, Suzanne J.M.H. (University of Twente) Date 2018-03-31 Abstract Structures integrated in a grass-covered dike may increase erosion development. Currently, safety assessment methods for flood defences are only applicable for a conventional grass-covered dike and the effects of structures on dike cover erosion are poorly understood. Since many dikes have a road on top, it is important to study the effect of such a road structure on erosion onset during wave overtopping. To investigate this effect, a coupled hydrodynamic–eroison model was developed. The erosion onset caused by overtopping waves was predicted by combining the time-varying bed shear stresses from the hydrodynamic model with a depth-dependent erosion model. The results show that roads on top of a dike increase the erosion of the neighbouring grass cover. This increase in erosion may have a negative impact on dike stability. Therefore, we recommend considering effects of constructions on top of dike profiles during safety assessments. Explicitly, consideration of the roughness transitions in the safety assessments of dikes is recommended. Subject Asphalt roadBed shear stressesCFD simulationDike erosionFloodingWave overtopping To reference this document use: http://resolver.tudelft.nl/uuid:381c315e-23a6-4eef-8e32-dd9b88aed749 DOI https://doi.org/10.1007/s11069-018-3287-y ISSN 0921-030X Source Natural Hazards, 93, 1-30 Bibliographical note The article was published Open Access under the Dutch Compact Agreement; however, due to an internal system error, previous HTML rendering of the article did not reflect this. Part of collection Institutional Repository Document type journal article Rights © 2018 A. Bomers, J.P. Aguilar Lopez, JJ Warmink, Suzanne J.M.H. Hulscher Files PDF 10.1007_s11069_018_3287_y.pdf 2.81 MB Close viewer /islandora/object/uuid:381c315e-23a6-4eef-8e32-dd9b88aed749/datastream/OBJ/view