146
R.I-I. Charlier and Chr. P. De Meyer
The problem that now arises is how to diminish Q as the beach retreats. Two
possible methods come to mind. Denoting Q in the first stage by Q~ and in the
second stage by Q2, we could either set "
~
~1~' ~ |C .= ~1"- Slt I .~' r
H
t:i "%,.
- zs
1
°[-"
-~Y] 6 y ..--" -7"
~'-~__~_
,
usl
:_
,
Fig. 35 : Continuity equation (second stage)
B
Q2 = --QI
(104)
BH
which diminishes Q by the ratio of the remaining height of beach above MSL
to the original berm height or referring to fig. 35, set"
AreaEBCF
B 2D + B
Q2 -
Q1 -
-Q1
(105)
AreaABCD
BH 2D + BH
R.I-I. Charlier and Chr. P. De Meyer
The problem that now arises is how to diminish Q as the beach retreats. Two
possible methods come to mind. Denoting Q in the first stage by Q~ and in the
second stage by Q2, we could either set "
~
~1~' ~ |C .= ~1"- Slt I .~' r
H
t:i "%,.
- zs
1
°[-"
-~Y] 6 y ..--" -7"
~'-~__~_
,
usl
:_
,
Fig. 35 : Continuity equation (second stage)
B
Q2 = --QI
(104)
BH
which diminishes Q by the ratio of the remaining height of beach above MSL
to the original berm height or referring to fig. 35, set"
AreaEBCF
B 2D + B
Q2 -
Q1 -
-Q1
(105)
AreaABCD
BH 2D + BH