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Costal Inlets Research Program
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> Table 4-6 Summary of Morphology Change at Goldsmitth Inlet, 1955 to Present
Figure 4-50. Goldsmith Inlet, east bank wetlands, with protective sand bank, 8 October 2002
Summary of morphology change at Goldsmith Inlet - TR-05-20229
TR-05-2
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The
relatively
large
tidal
range and
large
sediment
grain
size
contribute
to
maintenance of
inlet
stability.
Continual
degradation
of the
jetty
at
Goldsmith
Inlet,
which
allows
sediment to enter the
inlet,
acts
to
reduce
inlet
stability.
Channel
migration
between
1996
and
2002
is
not
known.
It is
inferred
that
increasing
rates
of sediment bypassing
around
the
jetty
and
close
to
shore,
owing
to
full
impoundment
on the
west
side
and
spit
growth
on the
east
side,
promote
eastward
migration
of the
inlet
entrance.
Migration
of the channel
creates
an
increasingly
sigmoidal
or
"S"-shaped
configuration,
which
decreases
the
flushing
capacity
of the
inlet
because
of increasing
length
of channel and
associated
increase
in
friction
.
Table
4-6
Summary
of
Morphology
Change
at
Goldsmith
Inlet,
1955
to
Present
Date
Inlet
entrance
Inlet
channel
Inlet
Exit
1955
--
Natural
in-channel
flood
shoal
--
1963
-
1964
Construction
of
jetty
--
1964
New
work
dredging
New
work
dredging
New
work
dredging
Impoundment
west
Natural
flood
shoal
migration
of
jetty
and
Initial
formation
of
present
1964
-
1972
associated
erosion
east
and
west
lobes
east
of
jetty
Initial
formation
of
spit
east
of
jetty
Mature
and
stable
east
lobe
1972
-
1976
--
Assumed
acceleration
of
sediment
intrusion
Closure
of
Inlet
Closure
of
eastern
natural
Continued
flood
shoal
1976
-
1980
(1980)
channel
growth
Assumed
stability
through
regular
Mature
and
stable
west
dredging
lobe
1980
-
1990
--
Establishment
of
Period
of
channel
infilling
natural
effective
begins
sediment
bypassing
Continued
spit
Development
of
attached
west
development
bank
shoal
Continued
period
of
1990
-
2002
channel
infilling
Initial
channel
Channel
infilling
in
mid
-
migration
channel
Rapid
spit
formation
Inundation
of
Wetlands
Continued
period
of
2002
-
2003
presumably
from
raised
Rapid
eastward
channel
infilling
elevation
of
channel
infilling
channel
migration
Dredging
and
April
2004
--
--
reorientation
of
inlet
202
Chapter
4
Morphology
Change,
and
Channel
Shoaling
and
Migration
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