Wave And Wave Overtopping Measurements In A Complex Area And At A Real Dike

Abstract

Wave overtopping is not easy to measure in real field situations. A 12-years long program started in 2018 to measure wind, wave and water level conditions in a complex estuary, together with wave overtopping measurements at dikes. The first winter storm was measured on 8 January 2019 and first results were described in Van der Meer et al. (2019). Wave and water level conditions are measured directly in front of the dike. Overtopping is measured with two identical overtopping boxes that were placed in the dike, but at different levels, see Figure 1. A measuring pole in front of the dike has measured wave and water level conditions for 10 years already and the design of the overtopping boxes was based on those data. In recent years, a system was invented that measures wave run-up and wave overtopping with two parallel lasers, see Figure 2. The laser scanner system was placed next to the overtopping boxes to enable a proper validation. First results were presented in Oosterlo et al. (2021a; 2021b). This paper describes the further storms that have been measured up to now, including new measurement devices, improvements to measurement devices and new analysis methods. This all brings new insights, but more storms and improvements of measurements are needed to come to a full understanding of this complex estuary.