Physical Modelling of the Sea Defence Structures at Wenduine for Structural Design

Physical small scale model tests are carried out on behalf of the structural design of the coastal protection at the Belgian coastal town Wenduine. A vertical wall is constructed on the promenade on top of the dike to protect the coastal town and hinterland against flooding. The necessary wall height to limit wave overtopping discharges to an acceptable predefined level is determined. Individual wave overtopping volumes are also studied. For the structural design, horizontal forces on the vertical wall are determined. Several storm conditions with different water levels are considered.

The average level of Belgian coastal towns is situated around high water sea level. This poses a major risk of flooding during severe storms. A master plan for coastal safety was established by the Flemish government to strengthen the flooding sensitive spots at the coastline (Afdeling Kust, 2011). The Roundabout at the dike of the Belgian coastal town Wenduine was assessed as a very weak link. Sea defence structures to protect this coastal area and the hinterland are indispensable.