Page 



Fig. 16. Duration graph. Wave velocity as a function of 



duration t and wind velocity v, using nondimensional 

 parameters IO7 



Fig. 17« Duration graph. Wave height as a function of 



duration t and wind velocity v using nondimensional 

 parameters IO8 



Fig. 18. Minimum fetch, in kilometers (Xjjj), for developing the 

 stage B ,p(l) and p* = I.35 at different wind 

 velocities 109 



Fig. 19. Minimum dioration, in hours (t^), for developing the 

 stage Pip, p(l) and p* = I.35 at different wind 

 velocities 110 



Fig. 20. Wave height (H) and period (T) in the first stages 



of complex sea development (Pm-wave) as functions of 



distance from coast line (fetch x) at different hours 



of duration after a wind of v = I6 m/sec started to 



blow over an undisturbed water surface 113 



Fig. 21. Wave steepness, H/A » as a function of fetch x and 

 duration (hours) at a wind velocity v = I6 ra/sec, 

 corresponding to figure 20 114 



Fig. 22. Wave height (H) and period (T) in the first stages of 

 complex wave development (Pm-wave) as functions of 

 duration t after a wind of v = I6 m/sec started to 

 blow over an unlimited fetch and an xindisturbed water 

 surface 115 



Fig, 23. Wave age, (T^/v, as a function of fetch x and duration 

 (hours) after a wind of v = I6 m/sec started to blow 

 over an undisturbed water siirface II6 



Fig. 24. Wave velocity (T* as a function of fetch x and wind 

 velocity v, using nondimensional parameters. Theo- 

 retical relationships shown by curves, observations 

 by symbols 120 



Fig. 25. Representation of observed data at low fetches. The 

 three curves show the theoretical relationship 

 <5^/o~^m = 9(gx/v^) at V = 5 m/sec, 10 m/sec and 20 m/sec 

 wind velocity. Observations are indicated by 

 symbols 122 



Fig. 26. Wave height H as function of fetch x and wind velocity 

 V, using nondimensional parameters. Theoretical 

 relationships shown by curves, observations by symbols 123 



136 



