The adoption has for its object et determining the overtopping discharge on and the forces on a storm wall. The tests cover the overtopping problems on the quays of the port of Oostende which is determined from an assessment that there is currently an unsafe situation when extreme storms (very high risk of flooding). From the test results of these formulas to be deduced which allow to overtopping for vege rable configraties and to calculate forces, given the dimensions of the quay and storm walls and the waves. On the basis of the forces and overtopping then the optimum height of the storm wall are calculated. The forces will be used to dimension the necessary foundation and calculate the structural stability of the storm wall