40 60 80 100 120 140 



Applied hp per foot of Breakwater 



180 



Figure 155. Effect of applied horsepower per foot, and wavelength, L, on 

 effectiveness of hydraulic breakwater (various wave heights, H) 

 at a 40-foot water depth (after Herbich, Ziegler, and Bowers, 

 1956). 



220 



«5 200 



o 



1.0 20 3.0 4.0 5.0 60 7.0 8.0 9.0 



Diameter of Supply Pipe in feet 



10.0 



Figure 156. Effect of supply pipeline diameter, length of supply pipeline, 

 and supply pipeline velocity on total horsepower requirements of 

 hydraulic breakwater, extrapolated from small-scale laboratory 

 data (after Herbich, Ziegler, and Bowers, 1956). 



216 



