As already anticipated in Section 3.4
, with the MWL rise, coastal defense structures will be exposed to larger wave heights than the design values, in particular all the structures that are built in shallow waters where the depth imposes the maximal wave height because of bathymetric breaking. If MWL rise is 1
m, the crest of these structures will have to be raised between 2 and 3
m to keep the same overtopping volumes. Moreover, the structures will observe more frequent and more severe damage unless the armor layers are reinforced. Schematically, with the increase of damages, the stakeholder will adopt one of the following scenarios according to the severity ...