-BF. 



Q* = Ae 



(20) 



where 



Q» = Owen's dimensionless overtopping 



= Q/(TgH ) 



s p 



Q = mean overtopping volume rate, LVT 



f = mean zero upcrossing wave period, T 



F* = Owen's dimensionless freeboard 



= F/ (^viHr) 



F = freeboard, L 

 38. Values for A and B are presented in Table 1. 

 slopes of 1 : 1 , 1:2, and 1:4 are from the experimental data 

 been interpolated. Owen cautions against applying his method to situations 

 other than those he tested. His experimental parameter ranges were as 

 follows: 



The values for 

 The others have 



0.05 < F* < 0.30 



10~ 6 < Q» < 10" 2 



1.5 < d s /H s < 5.5 



0.035 < H /L < 0.055 

 so 



Table 1 



Empirical Coefficients for Owen's Overtopping 



Equation (from Owen 1980) 





Seawall Slope 





A 





B 



1:1 



7.94 



X 



10" 3 



20.12 



1:1.5 



1.02 



X 



10" 2 



20.12 



1:2 



1.25 



X 



10- 2 



22.06 



1:2.5 



1.45 



X 



10" 2 



26.1 



1:3 



1.63 



X 



io- 2 



31.9 



1:3.5 



1.78 



X 



io- 2 



38.9 



1:4 



1.92 



X 



10~ 2 



46.96 



1:4.5 



2.15 



X 



IO' 2 



55.7 



1:5 



2.5 



X 



10~ 2 



65.2 



22 



