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The waves for design are expected to have a period of 15 s and coming with an angle of 45 degrees with respect to the vector perpendicular to the shoreline. Top view Offshore waves 45° Pier Horizontal view L>50 m 0.07 Problem 1. Offshore design wave (1 Points). As a first step, determine the deep water wave whose wave height has a return period of 100 years. Use the Weibull distribution parameters and storm occurrence rate from the table to calculate the design wave. Problem 2. Determination of pier length (2 points). The pier includes a docking site at its end. As a safety measure, the dock (end of pier) must be 50 m away from the breaking zone and the sediment closure depth. Determine the length of the pier and the depth at the docking site. Hint 1: For the breaking criterion use k=0.78-H/h. You can use the approximation of section 3.4.2 (i.e. the angle is approximately 0 at the breaking zone). Use the wave height of Prob. 1 Hint 2: For the closure depth use the "deeper seaward closure depth" and the formula of Hallermeier and Birkemeier. Compute He with Hs and as from the table. Problem 3. Condition at the end of the pier (2 Points). Determine the actual wave propagation angle of the design wave at the end of the pier and the wave height. Note that you need to solve problem 2 to know where is the end of the pier.

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