[2] Deep water waves with wavelength of 100m and approach angle of 60° propagating

towards the shore as shown in Figure below. At depth d=20m wave height H20= 3m.

a) Find deep water wave height (Ho) and wave height at 5m water depth (Hs).

b) Extend the wave ray in Figure down to the location of the star shown on the shoreline

qualitatively (schematically)

c) Explain briefly why the shape of the shoreline is altered as shown in the figure below.

d) If the wave direction at the deep water is 90°, what will happen to the wave and the beach

profile?

Bottom Contours

of

d-20

d=15-

d=10-

d-5- --

Ho=?

Lo= 100 m

Shore line d-0

ao 60

Top view