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Costal Inlets Research Program
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FIELD DATA COLLECTION - cd01-cialone-kraus0002
Tidal Circulation Modeling
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Fig
2.
Instrument
tripod
NUMERICAL
SIMULATIONS
The
field-data
collection
supports
both
circulation
and
wave
numerical
models
for
Grays
Harbor.
The
ADvanced
CIRCulation
(ADCIRC)
long-wave
hydrodynamic
model
can
define
the
circulation
and
water
level
associated
with
both
tide
and
wind
(Luettich
et
al.
1992).
A
two-dimensional
(depth-averaged)
version
of
ADCIRC
was
applied.
The
Corps'
Coastal
Inlets
Research
Program
(CIRP)
has
enhanced
ADCIRC
to
include
flooding
and
drying,
and it
has
exercised
the
model
in
shallow
water
estuarine
conditions
such
as at
Willapa
Bay,
Washington
and as a
reconnaissance
-level
study
at
Grays
Harbor,
Washington.
The
reconnaissance
-level
application
of
the
ADCIRC
model
at
Grays
Harbor
was enhanced and
refined
with
field
data
collected
in
the
Corps'
navigation
study.
The
steady-state
spectral
wave
model
STWAVE
has
been
modified
in
the
CIRP
to
represent
the
wave-current
interaction
including
the
wave-action
equation,
current-induced
breaking,
and
wave
blocking
by a
current
(Smith
et
al.
1999).
Communication
between
ADCIRC
and
STWAVE
is
necessary
in
this
study
for
computing
wave-generated
currents
through
the
transfer
of
the
radiation
stresses
from
STWAVE
to
ADCIRC
and
the
transfer
of
tide-,
wind-,
and
wave-generated
currents
from
ADCIRC
to
STWAVE.
In
addition
to
improved
wave
modeling
in
the
presence
of a
strong
current,
STWAVE
will
give
reliable
estimates
of
sea-state
in
the
channel.
It can also
quantify
storm
wave
conditions
as a
function
of
the
wind.
The
CIRP
is
presently
upgrading
STWAVE
to
include
diffraction
through
a
gap,
as
found
at
the
Grays
Harbor
jetties
that
open to
the
bay.
Cialone
& Kraus
3
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