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Costal Inlets Research Program
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> Figure 5. Initial inlet channel at start of Run 1
Inlet Equilibrium Experiments: Conditions and Results
Run 4
CHL-TR-01-20
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depth
of
0.03
m
(0.1
ft)
and
width
of
0.3
m (1
ft)
was
carved
in the
sand
from
ocean
to
bay
(Figure
5).
One
tidal
cycle
was
run.
Bay
tide
range
was
measured
to
be 10
percent
of
ocean
range.
The
channel
area
was
near
or
just
greater
than
un-
stable
equilibrium
indicating
it
would
most
likely
close,
and
the
length/minimum
area
combination
was
judged
to produce
too
much
inlet
choking.
There
was
minimal
response
in the channel
area.
Figure
5.
Initial
inlet
channel
at
start
of Run 1
Run 2
The
inlet
initial
area
was
increased
by
mechanically
deepening to
6.1
cm
(0.2
ft).
After
2.5
tide
cycles
the
inlet
minimum
area
was
not
appreciably
chang-
ing.
Maximum
current
had
fallen
to 22
cm/sec,
and
sediment
movement
was
de-
creasing.
The
channel
length/minimum
area
combination
still
created
a
strongly
friction
dominated
inlet.
Run 3
The
inlet
channel
was
widened
mechanically,
and
tide
plus
waves
were
run.
Appreciable
currents
were
maintained
in the channel
(39
cm/sec).
It
was
judged
that
appropriate
initial
conditions
were
obtained.
13
Chapter
4
Experiments
and
Results
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