■^ = 0.4 and |- = 0.6 

 s 



SOLUTION: From Figure 7-41 the transmission by overtopping coefficient is 

 greater than 0.0 approximately 50 percent of the time for F/R = 0.6 . 



FIND: 



(b) What is the wave height equaled or exceeded 1 percent of the time for 



this example. 



(«t) 



1% 



SOLUTION : From Figure 7-42 CF = 0.93 for -r- = 0.4 and from Figure 7-41, 



(»t)i% = o-^5h . 



so 



(^t)i% " (0-^5H^) (0.93) = 0.42Hg 

 *************************************** 



*************** EXAMPLE PROBLEM H*************** 



^ ./ equals 



FIND ; The percentage of time that 



for F/R = 0.8 and ^=0.1 . 

 s h 



equals or exceeds a value of 0.2 



SOLUTION 



the 



ON: From Figure 7-41, (h ) 2:0.2 H for approximately 6 percent of 

 time. \ /P 



*************************************** 



CJ 



1.0 

 0.8 

 0.6 

 0.4 

 0.2 



0.1 



0.2 



0.4 0.8 1.0 

 B/h 



2.0 3.0. 



K), 



Figure 7-42. Correction factor, CF , to multiply by \^' ^ for — > 0.1 . 



ri n 



s 



*************** EXAMPLE PROBLEM 12*************** 



FIND : Transmitted wave heights for the following conditions for a smooth 

 impermeable breakwater (assume irregular waves): 



7-71 



