Question 3

A hurricane has a maximum sustained local wind speed of U₁0 = 45 ms-¹.

a) What is the appropriate hurricane category?

b) What is the deep-water significant wave height (Hs) and peak frequency (fp) of waves produced

by the hurricane associated with U10?

c) If this wind speed occurs over water h = 15 m deep, determine the dimensionless shallow water

frequency whp and suggest whether we should use the JONSWAP or TMA spectrum to describe

the waves generated by this storm.

d) Plot the spectral energy density associated with this wind speed using the appropriate spectrum

you identified in part (c).

e) Using the spectrum from (d), determine the significant wave height H, at this depth of h = 15

m.