Abstract.
The
transport
mechanisms
of
floating
marine
debris
in
coastal
zones
remain
poorly
understood,
primarily
due
to
the
complex
geometry
and
influence
processes
which
pose
difficulties
incorporating
them
into
Lagrangian
numerical
models
at
scales.
model
presented
this
study
addresses
these
challenges
using
nested
grids
varying
hydrodynamic
resolutions
(2.5
km,
350
m,
70
m).
couples
Eulerian
data
with
a
particle
solver
accurately
simulate
motion
plastic
particles
regions.
A
validation
was
conducted
drifter
assess
model’s
skill
confidence
simulation
predictions.
results
demonstrated
high
stability
72-hour
forecast
horizons
score
values
close
shoreline.
Additionally,
beaching
sensitivity
analysis
performed
determine
parameterisations
suitable
for
zones.
This
that
real-time
distance
shore
during
simulations
most
accurate
method
detecting
land-water
boundary
scales,
representing
residence
times
spatiotemporal
patterns.
Simulations
were
single
coarse
grid,
both
same
input
from
river
outflows
pilot
test
Barcelona
coastline
morphology
structures,
two
major
mouths,
large
harbour.
revealed
marked
differences
amounts
times.
Both
exhibited
levels
beaching,
grid
registering
91.5
%
low-resolution
showing
95.8
surpassing
other
studies
larger
Beaching
variability
within
demarcated
areas
between
simulations,
highest
flux
observed
near
Llobregat
River
mouth
release
point.
inner
port
area
showed
have
18
longer
when
high-resolution
data,
demonstrating
ability
solve
geometrical
structures.
By
grids,
can
resolve
potential
accumulation
litter
hot-spots
Environmental Pollution,
Journal Year:
2024,
Volume and Issue:
361, P. 124863 - 124863
Published: Aug. 30, 2024
The
weight
of
marine
litter
has
been
marginally
considered
in
comparison
to
counting
and
categorizing
items.
However,
determines
dynamics
on
water
coasts,
it
is
an
essential
parameter
for
planning
optimizing
clean-up
activities.
This
work
reviewed
80
publications
that
reported
both
the
number
beached
macro-litter
worldwide.
On
average,
a
item
weighed
19.5
±
20.3
g,
with
median
13.4
g.
Plastics
composed
80%
by
51%
global
bulk.
A
plastic
12.9
13.8
g
9
analysis
based
continents
bodies
returned
similar
values,
which
can
be
used
estimate
beaches
from
past
future
visual
census
surveys,
remote
sensing
imagery.
Overall,
this
improve
monitoring
reports
support
modelling,
thereby
contributing
environmental
protection
mitigation
efforts.
Marine Pollution Bulletin,
Journal Year:
2024,
Volume and Issue:
201, P. 116191 - 116191
Published: Feb. 29, 2024
Management
of
plastic
litter
in
Marine
Protected
Areas
(MPAs)
is
expensive
but
crucial
to
avoid
harms
critical
environments.
In
the
present
work,
an
open-source
numerical
modelling
chain
proposed
estimate
seasonal
pathways
and
fates
macro-plastics,
hence
support
effective
planning
implementation
sea
beach
cleaning
operations.
The
approach
applied
nearshore
region
that
includes
MPA
Capo
Milazzo
(Italy).
A
sensitivity
analysis
on
influence
tides,
wind,
waves
river
floods
over
year
indicates
seasonality
only
slightly
affects
location
extension
macro-plastic
accumulation
zones,
operations
should
be
performed
autumn.
Instead,
rivers
distribution
for
optimal
interventions
coastal
area.
Geoscientific model development,
Journal Year:
2024,
Volume and Issue:
17(6), P. 2221 - 2245
Published: March 19, 2024
Abstract.
The
transport
mechanisms
of
floating
marine
debris
in
coastal
zones
remain
poorly
understood
due
to
complex
geometries
and
the
influence
processes,
posing
difficulties
incorporating
them
into
Lagrangian
numerical
models.
model
LOCATE
overcomes
these
challenges
by
coupling
Eulerian
hydrodynamic
data
at
varying
resolutions
within
nested
grids
using
Parcels,
a
particle
solver,
accurately
simulate
motion
plastic
particles
where
high
spatial
coverage
resolution
are
required
resolve
processes.
Nested
performed
better
than
coarse-resolution
grid
when
analysing
model's
dispersion
skill
comparing
drifter
simulated
trajectories.
A
sensitivity
analysis
different
beaching
conditions
spatiotemporal
patterns
demonstrated
notable
differences
land–water
boundary
detection
between
high-resolution
shoreline
data.
latter
formed
basis
for
module
that
parameterised
calculating
distance
shore
during
simulation.
realistic
discharge
scenario
comparison
around
Barcelona
coastline
distance-based
conjunction
with
or
revealed
very
levels
(>91.5%)
each
case,
demonstrating
importance
appropriately
parameterising
scales.
In
this
scenario,
variability
residence
times
was
observed
simulations.
These
derived
from
how
option
resolved
shoreline,
being
much
higher
areas
intricate
configurations
grids,
thus
resolving
structures
were
undetectable
grid.
can
effectively
integrate
deposition
scales
uniformity.
Frontiers in Marine Science,
Journal Year:
2025,
Volume and Issue:
11
Published: Jan. 27, 2025
Introduction
Coastal
areas
are
considered
potential
sinks
for
plastic
in
marine
environments.
Data
from
a
Lagrangian
numerical
simulation
at
coastal
scale
using
high-resolution
hydrodynamic
information
and
observational
data
of
river
debris
discharge
were
analysed
to
determine
the
environmental
variables
meteorological
forcing
or
coastline
orientation
contributing
particle
beaching.
Method
A
beaching
likelihood
parameter
was
developed
quantitatively
measure
propensity
an
area
receive
accumulate
particles
known
outflow
source.
Statistical
analyses
conducted
reveal
possible
relationships
with
variables.
mass
budget
calculated
release
used
simulation.
Results
Areas
close
points
received
highest
amounts
also
registered
values.
Significant
wave
height
mildly
affected
(Pearson’s
r
=0.36).
Relative
perpendicular
directions
promoted
coastlines
lower
azimuths
(vertical
orientation),
whereas
those
higher
(horizontal
orientation)
more
by
relative
alongshore
directions.
The
contribution
on
beaches
where
cleanup
available
6.0%
total
collected.
Discussion
revealed
influence
geometry
deposition
area.
Comparisons
other
studies
regarding
residence
times
challenging
due
difference.
complexity
process
makes
it
difficult
establish
variables,
although
clear
association
between
direction
established.
two
rivers
included
orders
magnitude
than
indicated
Journal of Marine Science and Engineering,
Journal Year:
2025,
Volume and Issue:
13(2), P. 341 - 341
Published: Feb. 13, 2025
The
water
quality
in
port
domains
is
highly
dependent
on
the
capacity
for
renewal
and
mixing
with
external
water.
This
study
uses
Lagrangian
modelling
to
investigate
time
Barcelona,
Tarragona,
Gijón
harbours
(Spain),
which
represent
semi-enclosed
micro-tidal
meso-tidal
environments.
For
this
purpose,
different
particle-tracking
simulations
have
been
carried
out
each
of
ports
trends
circulation
both
surface
layer
at
bottom.
results
indicate
that
microtidal
Mediterranean
ports,
longer
bottom
(32
days
Barcelona
61
Tarragona).
Conversely,
mesotidal
Gijón,
located
Cantabrian
coast,
opposite
pattern
observed,
higher
times
(14
days).
While
from
exhibit
magnitudes
comparable
situ
measurements
previous
studies,
it
remains
essential
evaluate
specific
characteristics
method
compare
these
findings
other
similar
works.
