The runup, uncorrected for scale effects, is 



R = (2.0) (H^) 

 = (2.0)(2.68) 



R = 5.4 meters (17.7 feet). 

 The scale correction factor, k, is discussed in Section VI. 



Alternatively, use of Figure 6 together with equation (8) gives 

 lue of R/H^ 

 from Figure 14. 



a value of R/H' = 1.97, which is essentially the value determined 



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



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



EXAMPLE PROBLEM 5************** 



GIVEN : An impermeable smooth 1 on 2 structure is fronted by a 1 on 10 

 beach slope. Toe depth for the structure is d s = 3.0 meters (9.8 

 feet), but the beach slope extends seaward to a depth of 15.0 

 meters (49.2 feet), beyond which the slope is approximately 1 on 

 100. The design wave approaches normal to the structure and has 

 a height of H = 2.8 meters (9.2 feet) and period of T = 9.0 

 seconds, measured at a depth of 16.0 meters (52.5 feet). 



FIND : Determine the height of wave runup using the appropriate set 

 of curves given in Section V,l. 



SOLUTION : The wave height given is not the deepwater wave height; 

 it is measured, however, above the gentle 1 on 100 bottom slope 

 which approximates a horizontal surface. To determine the shoal- 

 ing coefficient, K g , for the location of measurement, calculate 



d_ _ /_d_ 

 L " \gT 5 



16 f . , 



- tt (2ir) 



(9.8) (9) 2 ' 



= (0.02016) (6.283) 

 7- = 0.12667. 



Lin 



54 



