Van Oord DMC was awarded the Contract for the Design and Construction of the Addu City Development project in the Maldives. The design of the shore protection works has been verified by means of 2D physical model testing at DHI in Denmark.
The steep foreshore and shallow reef flat (very typical for atolls) caused extensive shoaling and wave breaking, resulting in significant water level set-up and low-frequency waves on top of the reef flat. These nearshore wave transformation effects were dominant for the measured overtopping discharges, which could not be predicted or reproduced with existing overtopping calculation methods. Also, the magnitude of the water level set-up and the confined volume in the wave flume created a water level set-down near the wave generator. Therefore the offshore water level had to be corrected and calibrated by adding water to the flume at the start of the test.
