120
R.H. Charlier and Chr. P. De Meyer
hm
(4.347
-
J
HO0"473
"]
-- = 0.0063 exp ~
TO.~.o931V,.D~.U)
Lo
so
The total D-profile thickness is :
8 = ho + hm
(57)
The maximum value s~l of the coastal constant sy can be calculated from :
28 9fHoa6s(H°"] 0.9
(
,--0.0797
SymT
,,9|Ho 2.66t
|
In= 10.7950
"
~ j Dso ll" {I h { "J t (58)
x
In /
.J
The location of the maximum coastal constant Sy~ in the D-profile is defined with
the aid of the maximum value Sy~, its location A2m and a dimensionless
distribution function Sy/Sym of the form :
(i) for t52 > 62m (i.e. landwards of the location of Sym)
0.93
Sy/S~<
+ 0.07
(59)
1 - 1.01X2. n
(ii) for 62 < ~2m (i.e. seawards of the location of s.n)
0.99
sy/sy,, -
+ 0.01
(60)
I + 1.14X2.11
in both cases :
(H `]-I(H "]2
(61)
where A m =
For the computation of the equilibrium D-profile first is calculated the
equilibrium distance between the onshore and offshore profiles, with the division
between them at the water line (Wr).
d H o
2W r L o
[
{"
"~-0.717 "]-2.38
I ,0.132~-0.447|H0 /
J
---1'51
103In° tJs° t-~--o )
+0"111"0"3
(62)