A straight shoreline is disturbed by a coastal structure which is semi-circular shaped in plan view. If the waves approach the shore normally as indicated by the black arrow in the figure below, roughly sketch the wave crest curves around the structure. Assume that the shoreline bathymetry is uniform in the alongshore direction.

1. Estimate the maximum wave heights at points A and B in the region behind the breakwater in the attached plan. Given: H₁ = 5 ft; T = 6s; d =22 ft. Answers Maximum H at point A: T Maximum H at point B: 420 ft 350 ft A ↑。 B 30⁰ 1400 ft

A concrete coated steel gas pipeline is to be laid between two offshore platforms in 100 m water depth where the maximum environmental conditions include waves of 20 m wave height and 14 s period. The pipeline outside diameter is 46 cm, and the clay bottom slope is 1 on 100. Determine the submerged unit weight of the pipe. Assume linear wave theory is valid and that the bottom current is negligible.

A wide channel is 1 m deep and has a velocity of flow v as 2.13 m/s. If a disturbance is caused, an elementary wave can travel upstream with a velocity of (a) 1.00 m/s POI (c) 3.13 m/s (b) 2.13 m/s (d) 5.16 m/s

For both hydrostatic force and theoretical depth of center of pressure plotted vs depth of immersion, what happens when the vertical end face of quadrant becomes fully submerged.