10^ 



10' 



10' 







1 



d 



/ 





k-' 



/. 



^ 



^ 





d 



' 5 



^^ 



i20 



OetpBOter Wava Hql. 



Peok Period 



Tp= "*^^ 

 3.5g 





1 



\ 



1 



i 



^ 



/ 

















1 



f 



























0.075 0.125 0.175 0.225 0-275 



Oimensionless Wove Hql., H:gH,/' 



Figure 2. Dimensionless fetch versus dimensionless 

 wave height as a function of d/Ho. 



(4) To calculate the adjusted windspeed, U^^, the following pro- 

 cedure should be used: 



(a) If windspeed is observed at any level other than 33 feet 

 (10 meters) windspeed on land or water, the adjustment to the 33- 

 foot level is approximated by: 



Uio 



1/7 



-m^ 



where Uiq is the 10-meter windspeed in meters per second, Z 

 the height of wind measurement above the surface in meters, and 

 Uz the measured windspeed in meters per second. This method 

 is valid up to about Z = 66 feet (20 m.eters) . If the windspeed 

 was measured at 33 feet, Uiq = Uz* 



(b) If windspeed was measured overland, correct to overwater 

 windspeed by 



