where 



U = adjusted wind stress factor = 0.71 U 



1.23 



(eq. 3-28a) 



U = surface windspeed 



(2) Example Calculation . 

 U = 80 km/hr (22.22 m/s) 

 F = 89.3 km (89,300 m) 

 D = 0.01 km (10.37 m) 

 U^ = 0.71 U^-23 = 0.71 (22.22)^-23 = 32.19 m/s 



^, (9.806) (89 300) ^3^3^^^ 

 U^ (32.19)^ 



M. (9.806) (10.37) ^ ^^^^3^ 

 U^ (32.19)^ 



H^ = 0,^83^32^ tanh[o.530 (0.098l)3/^]x 



tanh 



0.00565 [845.09]^^^ 



[CO 



tanh (0.53) (0.0981) 



3/4 



]i 



H„ = 2.61 m 



(eq. 3-39) 



T. = 



_ 7.54 (32.19) 



9.806 



tanh 



0.833'(0.098l]-^'^^ X 



tanh. 



0.0379 [845. 09]^^^^ 



tanh 



r(0.833)(0.098l)-^^^1 



(eq. 3-40) 



T„ = 6.55 s 



See tabulation and graph on next page. 



8-19 



