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EXAMPLE PROBLEM ************** 



GIVEN : Consider a hurricane at latitude 350N. with R = 36 nautical miles, 

 Ap = 29.92 - 27.61 = 2.31 inches of mercury, and V^, forward speed, = 

 26 knots. Assume for simplicity that a = 1.0. 



FIND : The deepwater significant wave height and period. 

 SOLUTION : 



Using Equation 3-35 



U 



U 



max 



0.868 [73/p -p Y' - R(0.575f)l 

 0.868 [73(2.31)^^ - 36(0.575X0.300)1 



^max =" 0-^^8 (110.95 - 6.23) = 90.9 knots. 



Using Equation 3-34 



Ur = 0.865 U^,^ + 0.5 V^ 



Uj^ = 0.865 (90.9) + 0.5 (26) = 91.6 knots. 



Using Equation 3-31 



H^ = 16.5 e 



RAp 

 100 



0.208 aVc 



1 + 



Vu 



R 



where the exponent 



RAp _ 36(2.31) 



100 



100 



= 0.832, 



and 



then 



eO.832 = 2.30 



H^ = 16.5 eO-832 



1 + 



0.208 X 1 X 26 



V9I.6 



Hq = 16.5 (2.30) (1.564) = 59.4 feet. 



3-60 



