Then, 



I 400 



thus. 



1.27 

 L 315.46 



- > 0.5 

 L 



The appropriate set of design curves is then determined; 

 the flow chart in Figure 12 shows that Figure 9 has the appro- 

 priate curves, and that the results are presumed correct at 

 model scales. From Figure 9, for H'/gT^ = 0.0038, 



3.0 . 



The runup is 



« = (I) '«i 



.^) = (3.0) (9.82) 

 R = 29.5 feet (9.0 meters) . 

 For cot 0=2, the scale-correction factor, from Figure 13, is 



k = 1.136 . 

 Thus, the corrected runup is 



R = (1.136) (29.5) = 33.5 feet (10.2 meters) . 



************* EXAMPLE PROBLEM 3************* 



GIVEN : A design geometrically similar to that in example problem 2, 

 where an impermeable, smooth, 1 on 2 structure is fronted by a 1 on 

 10 bottom slope. Toe depth for the structure is dg = 10 feet, but 

 the bottom slope extends seaward to a depth of 50 feet beyond which 



29 



