Road impact on erosion development during overtopping flood events
toon extra info.
A. Bomers Bsc
|[Netherlands] : [publisher not identified]|
|1 online resource (PDF, IV, 84 pages) illustrations|
|Student report, University of Twente, Civil Engineering and Management|
|Toelichting (Engels)||In the Netherlands, a large number of riverine flood defences are combined with roads located at the crest. However, the influence of this road on erosion development during wave overtopping is not yet known. The objective of the research is therefore to quantify the influence of a road located on top of a flood defence on the erosion development during wave overtopping. Experiments were performed with the wave overtopping simulator, which is a device to perform destructive tests on inner slopes of dikes in order to establish the erosion resistance against overtopping waves. In Millingen aan de Rijn an experiment was performed on a dike with a road on top. Measurements of this experiment were used as boundary conditions and validation data. A coupled hydrodynamic-bed model was developed. With the use of COMSOL Multiphysics a CFD simulation was performed, which models the water released by the wave overtopping simulator and the hydrodynamics along the dike profile. Tests with a discharge of 50 and 100 l/s per meter were simulated. With the computed bed shear stresses, the amount of scour was determined.|