Geoscience Reference
In-Depth Information
Stability in waves
For the stability regarding waves, the element on top is considered in terms of formula
(5.7) and Table 5.3.
H
s
10
≤
Δ⋅
t
D
t
D
08
098 192
.
=
043
.
⇒
complies
.
⋅
.
Stability in current
The main influence on current in a large lake will be caused by the wind, the magni-
tude of which is unknown. So we look at the maximum allowable current that may
be present before instability occurs according to formula (5.8):
u
cr
12
12
Δ
D
12
9810
⋅
98 1925
=
.1 m/s
1
≤⇒
u
g
=⋅
⋅
⋅
⋅
t
D
⇒
u
.
2
9
.
.
98 1
g
D
cr
t
D
It is highly unlikely that this current will occur in a lake due to wind effects. The
geotextile tubes thus comply also in terms of stability due to water currents.
