Marine Pollution Bulletin,
Journal Year:
2023,
Volume and Issue:
196, P. 115503 - 115503
Published: Oct. 1, 2023
Plastics
in
rivers
and
lakes
have
direct
local
impact,
may
also
reach
the
world's
oceans.
Monitoring
river
plastic
pollution
is
therefore
key
to
quantify,
understand
reduce
plastics
all
aquatic
ecosystems.
The
lack
of
harmonization
between
ongoing
monitoring
efforts
compromises
comparison
combination
available
data.
United
Nations
Environment
Programme
(UNEP)
launched
guidelines
on
freshwater
monitoring,
provide
a
starting
point
for
practitioners
scientists
towards
harmonized
data
collection,
analysis,
reporting.
We
developed
five-step
workflow
support
design
effective
strategies.
was
applied
three
(Rhine,
Mekong
Odaw)
across
relevant
gradients,
including
geography,
hydrology,
levels.
show
that
despite
simplicity
selected
methods
limited
duration
our
approach
provides
crucial
insights
state
very
different
basins
globally.
Frontiers in Water,
Journal Year:
2022,
Volume and Issue:
3
Published: Jan. 26, 2022
Land-based
plastic
waste,
carried
to
the
sea
through
rivers,
is
considered
a
main
source
of
marine
pollution.
However,
most
plastics
that
leak
into
environment
never
make
it
ocean.
Only
small
fraction
are
found
in
terrestrial
and
aquatic
compartments
river
systems
emitted,
vast
majority
can
be
retained
for
years,
decades,
potentially
centuries.
In
this
perspective
paper
we
introduce
concept
as
reservoirs.
Under
normal
conditions,
hydrometeorological
variables
(such
wind,
runoff
discharge)
mobilize,
transport
deposit
within
different
(e.g.,
riverbanks,
floodplains,
lakes,
estuaries).
The
emptying
these
reservoirs
primarily
occurs
under
extreme
hydrological
conditions
storms,
floods).
specifically
focus
on
retention
mechanisms
compartments,
their
effect
fate
accumulated
various
timescales.
We
aim
rivers
(long-term)
sinks
pollution,
provide
suggestions
future
research
directions.
The Science of The Total Environment,
Journal Year:
2023,
Volume and Issue:
875, P. 162644 - 162644
Published: March 7, 2023
Knowledge
on
environmental
plastic
emission
and
spatial
temporal
accumulation
is
vital
for
the
development
of
successful
mitigation
strategies
risk
assessments
plastics.
In
this
study,
emissions
both
micro
macro
from
value
chain
to
environment
were
assessed
a
global
level
through
mass
flow
analysis
(MFA).
All
countries,
10
sectors,
8
polymers
7
compartments
(terrestrial,
freshwater
or
oceanic)
are
distinguished
in
model.
The
results
assess
loss
0.8
million
tonnes
(mt)
microplastics
8.7
mt
macroplastics
2017.
This
respectively
0.2
%
2.1
plastics
produced
same
year.
packaging
sector
contributed
most
macroplastic
emissions,
tyre
wear
microplastic
emissions.
With
MFA
results,
accumulation,
degradation
transportation
considered
Accumulation
dispersion
model
(ADM)
until
2050.
predicts
macro-
2.2
gigatonnes
(Gt)
3.1
Gt
2050
(scenario:
yearly
consumption
increase
4
%).
will
be
30
less
when
production
reduction
1
modeled
1.5
2.3
respectively.
Almost
2.15
accumulate
with
zero
after
2022
due
leakage
landfills
processes.
Results
compared
other
modeling
studies
quantifying
environment.
current
study
lower
ocean
higher
surface
waters
like
lakes
rivers.
Non
aquatic,
terrestrial
observed
emitted
approach
used
flexible
adaptable
that
addresses
over
time
space,
detail
country
compartments.
Nature Water,
Journal Year:
2023,
Volume and Issue:
1(6), P. 514 - 522
Published: June 15, 2023
Abstract
Plastic
pollution
in
the
world’s
rivers
and
ocean
is
increasingly
threatening
ecosystem
health
human
livelihood.
In
contrast
to
what
commonly
assumed,
most
mismanaged
plastic
waste
that
enters
environment
not
exported
into
ocean.
Rivers
are
therefore
only
conduits
but
also
reservoirs
of
pollution.
mobilization,
transport
retention
dynamics
influenced
by
hydrological
processes
river
catchment
features
(for
example,
land
use,
vegetation
morphology).
Increased
discharge
has
been
associated
with
elevated
rates,
although
exact
relation
between
two
can
vary
over
time
space.
However,
precise
role
an
extreme
event
on
still
unknown.
Here
we
show
fluvial
floods
drive
macroplastic
(>2.5
cm)
(items
h
−1
)
accumulation
m
−2
systems.
We
collected
unique
observational
evidence
during
July
2021
flood
along
whole
Dutch
part
Meuse.
multiplied
a
factor
100
compared
non-flood
conditions
(3.3
×
10
4
versus
2.3
2
items
).
Over
one-third
modelled
annual
item
was
estimated
occur
within
6
days
discharge.
Between
Maastricht
Ravenstein
(291
km
131
from
mouth),
period
decreased
90%,
suggesting
dispersal
mobilized
limited
due
entrapment
riverbanks,
floodplains.
riverbanks
significantly
river,
corroborating
river’s
function
as
reservoir.
Using
new
evidence,
demonstrate
crucial
drivers
Floods
amplify
mobilization
plastics,
effects
local,
river-scale
limited.
anticipate
our
findings
will
serve
starting
point
for
improving
global
estimates
transport,
export
sea.
Moreover,
results
provide
essential
insights
future
large-scale
long-term
quantitative
assessments
Reliable
observations
fundamental
understanding
key
designing
effective
prevention
reduction
strategies.
Environmental Science Processes & Impacts,
Journal Year:
2021,
Volume and Issue:
23(4), P. 535 - 552
Published: Jan. 1, 2021
The
contextualization
of
macroplastics
in
a
budget
framework
can
help
to
improve
our
understanding
the
physical
processes
determining
macroplastic
behaviour
and
impacts
rivers.
Hence,
better
management
practices
be
adopted.
Environmental Pollution,
Journal Year:
2022,
Volume and Issue:
312, P. 119948 - 119948
Published: Aug. 24, 2022
Plastic
pollution
in
the
natural
environment
is
causing
increasing
concern
at
both
local
and
global
scale.
Understanding
dispersion
of
plastic
through
key
importance
for
effective
implementation
preventive
measures
cleanup
strategies.
Over
past
few
years,
various
models
have
been
developed
to
estimate
transport
plastics
rivers,
using
limited
observations
river
systems.
However,
there
a
large
discrepancy
between
amount
being
modelled
leave
systems,
that
has
found
seas
oceans.
Here,
we
investigate
one
possible
causes
this
mismatch
by
performing
an
extensive
uncertainty
analysis
riverine
export
estimates.
We
examine
from
homogenisation
observations,
model
parameter
uncertainty,
underlying
assumptions
models.
To
end,
use
to-date
most
complete
time-series
macroplastic
(macroplastics
contain
mass
transported
rivers),
coming
three
European
rivers.
The
results
show
structure
up
four
orders
magnitude,
while
introduces
additional
magnitude
Additionally,
assume
variations
flux
are
primarily
driven
discharge.
correlations
discharge
(and
other
environmental
drivers)
never
above
0.5,
strongly
vary
catchments.
Overall,
conclude
yearly
load
rivers
remains
poorly
constrained.
Earth s Future,
Journal Year:
2022,
Volume and Issue:
10(8)
Published: July 12, 2022
Abstract
Plastic
pollution
in
aquatic
ecosystems
is
a
growing
threat
to
ecosystem
health
and
human
livelihood.
Recent
studies
show
that
the
majority
of
environmental
plastics
accumulate
within
river
systems
for
years,
decades
potentially
even
longer.
Long‐term
system‐scale
observations
are
key
improve
understanding
transport
retention
dynamics,
identify
sources
sinks,
assess
potential
risks.
The
goal
this
study
was
quantify
explain
variation
floating
plastic
Rhine‐Meuse
delta,
using
novel
1‐year
observational
data
set.
We
found
strong
positive
correlations
between
discharge.
During
peak
discharge
events,
up
six
times
higher
than
under
normal
conditions.
varied
factor
four
along
Rhine
Meuse
rivers,
which
hypothesized
be
related
complex
network,
locations
urban
areas,
tidal
dynamics.
Altogether,
our
findings
demonstrate
important
role
hydrology
as
driving
force
Our
emphasizes
need
exploring
other
factors
may
spatiotemporal
transport.
world's
most
polluted
rivers
connected
ocean
through
deltas.
Providing
reliable
data‐driven
insights
dynamics
optimize
prevention
reduction
strategies.
With
paper
we
aim
contribute
both
advancing
fundamental
establishment
long‐term
harmonized
collection
at
basin
scale.
