breaking wave depth, wave pressures on a wall may be approximated in the 

 following manner: 



The dynamic part of the pressure will be 



wC 



wdj 



(7-94) 



Figure 7-104. Wave pressures from broken waves: wall seaward of still-water 

 line. 



where w is the unit weight of water. If the dynamic pressure is uniformly 

 distributed from the still-water level to a height h^ above SWL, where h^ 

 is given as 



h = 0.78H, 

 e b 



then the dynamic component of the wave force is given as 



R = p h = 



(7-95) 



wd, h 



h e 



and the overturning moment caused by the dynamic force as 



M = R d + ^ 

 m m\ s 1 j 



where d„ is the depth at the structure. 



(7-96) 



(7-97) 



The hydrostatic component will vary from zero at a height h^ above SWL 

 to a maximum pg at the wall base. This maximum will be given as. 



w (d^ + hj 



(7-98) 



7-193 



