EXAMPLE PROBLEM II-2-1

FIND:

1-hr average winds for wave prediction

GIVEN:

10-, 50-, and 100-year values of observed winds at a buoy located in the center of a large lake (*U*10

= 20.3 m/s, *U*50 = 24.8 m/s, *U*100 = 28.2 m/s). It is also known that the averaging interval for the buoy

winds is 5 min.

SOLUTION:

Using Figure II-2-1, the ratio of the fastest 5-min wind speed to the average 1-hr wind speed is

approximately 1.09. Using this as a constant conversion factor, the 10-, 50-, and 100-year, 1-hr wind

speeds are estimated as *U*'10=18.6 m/s, *U*'50=22.8 m/s, and *U*'100=25.9 m/s.

II-2-4

Meteorology and Wave Climate

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