The Equations for Weights of Subsur: 
fata of sub-surface stone 
gales.\¢) In this method, a 
% sd, whose maximum een velocity is 
the depth d. This value is 
The only method presently available 
weights is that suggested by Iriba 
hypothetical wave height H' is 
the same as that which exists 
a 
is 
2 
wu 
Ble (6) 
Oe esha ea 
L 
where awe the height of a wave steepened by the breakwater, is d etalaeas by 
SUA E Tg equation (5) to points over the breakwater slope. This hypothetical 
} 19 
wave height is then substituted in equations (3) or ()) with K' - YG ke or 0,019 
(as determined from Iribarren). 
Charts and Tables 
The following charts and tables have been included to facilitate the 
solution of the basic equation 
; Comes (Hier He 
WW ON oy (7) 
(1.09 cosee - sinee )3 (S.= Se)3 
where 1.03 for seawater 
Q 
fh 
Cc 
Cc 
5 
LSS) 
5 
t 
Q 
tw 
Lean} 
iy} 
=z 1.00 for fresh water. 
ta 
h 
—~ 
ro 
f= 
fut} 
3} 
Q 
wm 
Hy 
tf 
Table 1 - lists values of _angleee , the slope ratio, and (1.09 
cose - sino \3 for slopes ranging from 1 on 1.1 to 
aL igi ALO) 
Plates 1 to 5 - are curves showing the variation of W/K' from 
equation (7) for seawater, with wave height H (or H'). 
Values of the functions have been computed for slopes 
of 1 on 13 to 1 on 10 with stone density being used as 
@ parameter. 
hows the variation of K' with d/L for slopes ranging 
Plate 6 = sh 
nea dl copay de Te) AL xenay 3} 
f+ 
ww 
