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Costal Inlets Research Program
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> Fig. 11. Side-mounted ADCP sensor for moving deployment application (photo from the US Geological Survey).
Table 2. Coastal, inshore and nearshore ADCP deployment configurations
Fig. 12. Example of a taught line ADCP mount for mid-depth deployment.
Fitzgerald-etal-CEJ-03
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January
13,
2004
14:38
WSPC/101-CEJ
00092
Recent
Developments
in
the
Geomorphic
Investigation
583
F
ig.
11.
Side-mounted
ADCP
sensor
for
moving
deployment
application
(photo
from
the
US
Geo-
logical
Survey).
Figure
14
shows
a
time
series
of ADCP
data
collected
from
a
shallow
estu-
ary
using
a
bottom-mounted
configuration.
The
grayscale
plot
(originally
in
color)
indicates
the
intensity
of
the
velocity
in
the
along-estuary
direction
with
respect
to
depth
(Zarillo,
2002).
The
lower
panel
shows
the
vertically
averaged
velocity
and
clearly
shows
the
current
speed
and
direction
changing
at
the
semidiurnal
tidal
frequency
dominant
in
the
estuary.
Since ADCP
technolgy
and
be used to
collect
current
data
over
a
vertical
profile
or
even
along
an
horizontal
profile
across
a
chan-
nel
or
inlet
throat,
it is
possible
to
apply
ADCP
data
to
calibrate
three-dimensional
hydrodynamic
models.
For
example,
Fig.
15 compares ADCP
derived
velocity
in
six
vertical
bins
with
predicted
velocity
in
5-vertical
layers
of a
numerical
circulation
model
in a
shallow
estuary.
2.7.3
.
Nearshore
directional
wave measurements
The
measurement
of wave
energy,
and
in
particular,
directional
spectra,
has
been
one
of
the
more
difficult
problems
in
observational
coastal
engineering.
ADCPs
combine
the
required
functionality
to measure
both
waves
and
currents
in
relatively
shallow
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