Hydrological Processes,
Год журнала:
2024,
Номер
38(11)
Опубликована: Ноя. 1, 2024
ABSTRACT
We
investigate
how
seasonal
flow
variations
and
a
climatic
regime
that
is
dominated
by
the
El
Niño–Southern
Oscillation
(ENSO)
influence
Sb
flux
dynamics
in
an
Australian
river
impacted
mining.
Sampling
(
n
=
496)
spans
hydrologically
complex
7‐year
period
of
drought,
bushfires
floods
from
2016
to
2023,
during
which
17%
samples
exceeded
drinking
water
guideline
concentration
(3
μg
L
−1
).
Aqueous
(Sb
Aq
)
concentration–discharge
C
–
Q
relationships
are
non‐continuous/non‐linear
across
range,
with
chemodynamic
behaviour
at
moderate
flows
reflecting
hydrological
connection
primary
Sb‐source
area
combined
variable
dilution.
In
contrast
chemostatic
occurred
extreme
low
high
flows,
disconnection
source
persistent
dilution,
respectively.
was
significantly
positively
correlated
p
<
0.01,
Spearman's
ρ
0.58)
index
representing
proportional
contribution
sub‐catchment
mineral‐field
area,
suggesting
sufficient
localised
rainfall
mining‐impacted
contributes
downstream
peaks
concentrations.
particulate
P
annual
loads
study
spanned
24–5174
1.2–2820
kg,
respectively
were
strongly
dependant
interannual
variability
dry
wet
years.
extrapolate
daily
load‐daily
discharge
d
for
estimate
over
53‐year
(1970–2023)
continuous
data
(mean
total
1865
kg
±
[SE]
247).
Positive
correlations
between
Southern
Index
both
0.05)
53
years
suggests
ENSO
fluctuations
transport
dynamics.
Upstream
load
estimates
correspond
coastal
floodplain
sedimentary
mass,
approximately
10%–45%
estimated
exported
since
1880
accumulated
on
Macleay
floodplain.
Data
suggest
current
rates
export,
complete
flushing‐leaching
mine
tailings‐derived
upper
catchment
may
take
order
600–1000
Hydrological Processes,
Год журнала:
2023,
Номер
37(2)
Опубликована: Янв. 24, 2023
Abstract
Landscape
organized
(or
structured)
heterogeneity
influences
hydrological
and
biogeochemical
patterns
across
space
time.
We
developed
landscape
indices
that
describe
the
spatial
configuration
of
nutrient
sources
sinks
as
a
function
their
distance
to
stream
(lateral
dimension)
or
outlet
(longitudinal
intersection
with
flow‐accumulation
areas.
Using
monthly
nitrate,
total
phosphorus
(TP),
soluble
reactive
(SRP)
daily
discharge
(Q)
data
from
221
rural
catchments
(1–300
km
2
)
2010–2020,
we
observed
higher
variability
in
flow‐weighted
mean
concentrations
smaller
than
larger
ones.
The
configurations
also
decreased
increasing
catchment
size.
A
index,
calculated
arable
land
use
weighted
by
on
flow
accumulation,
improved
prediction
TP
SRP,
but
not
compared
unweighted
use.
conclude
transfer
more
nitrate
transfer,
zones
riparian
areas
are
critical
source
for
respectively.
By
contrast,
lateral
(upslope–downslope)
longitudinal
(upstream–downstream)
dimensions
did
have
an
identifiable
influence
nutrients
temporal
dynamics.
this
study
can
help
design
landscapes
minimize
diffuse
losses
streams
show
management
is
first
order
control
losses.
Soil Science Society of America Journal,
Год журнала:
2024,
Номер
88(4), С. 981 - 999
Опубликована: Июнь 7, 2024
Abstract
The
soil
supports
many
ecosystem
services
(ES)
essential
to
human
well‐being.
Rapid
developments
in
digital
mapping
(DSM)
allow
the
of
types
and
properties
with
improved
resolution
accuracy.
However,
potential
DSM
improve
assessment
ES
is
not
fully
exploited.
To
better
understand
this
potential,
we
synthesized
peer‐reviewed
literature.
We
examined
what
empirical
studies
reveal
about
role
four
major
provided
by
forest:
(I)
timber
production,
(II)
carbon
storage,
(III)
regulation
water
flow
provision
clean
water,
(IV)
as
a
habitat
for
organisms.
Results
revealed
that
are
strongly
related
ES.
Therefore,
using
could
greatly
forests.
Several
variables
were
specific
regardless
region
or
types,
but
others
found
be
situation‐specific
(climate
type)
need
considered
at
proper
scale
within
land
classification
framework.
products
have
turning
qualitative
relationships
between
quantitative
ones.
This
also
lead
discovery
new
soil–ES
relationships.
For
realized,
progress
should
made
most
crucial
parameters
greater
precision
promoting
use
assessment.
Water Resources Research,
Год журнала:
2024,
Номер
60(7)
Опубликована: Июнь 27, 2024
Abstract
Intact
peatlands
provide
hydrological
ecosystem
services,
such
as
regulating
water
regimes
and
immobilizing
pollutants
within
catchments.
Climate
change
impacts
including
drought
wildfire
may
impair
their
functioning,
potentially
impacting
service
delivery.
Here
we
investigate
stream
quality
changes
following
the
combined
of
a
summer
in
peat‐dominated
catchment
UK
during
2018.
The
study
stores
legacy
(i.e.,
metals)
due
to
past
industrial
activity,
thus
making
it
particularly
susceptible
pollutant
release
wildfires.
We
quantified
chemistry
five
storm
events
over
9‐month
period
wildfire.
Concentration‐discharge
(C‐Q)
relationships
for
nine
solutes
were
analyzed
explore
activation
connectivity
solute
source
zones.
Hysteresis
flushing
indices
C‐Q
responses
further
described
dynamics
events.
found
that
most
nutrient
base
cation
concentrations
discharge
highest
immediate
post‐fire
decreased
subsequent
autumn
spring
storms.
Metal
increased
storms,
indicating
delayed
mobilization
from
within‐peat
or
distal
headwater
sources.
Our
findings
suggest
seasonal
re‐wetting
hydrologic
disturbance
influenced
zone
transport
catchment.
Water
associated
with
primarily
observed
months
wildfire,
suggesting
peaks
shortly
after
fire.
results
contribute
critical
understanding
future
risks
temperate
peatland
catchments
subject
disturbances
exacerbated
by
climate
change.
The Science of The Total Environment,
Год журнала:
2024,
Номер
951, С. 175365 - 175365
Опубликована: Авг. 6, 2024
Climate
change
is
expected
to
significantly
deteriorate
water
quality
in
heavily
managed
agricultural
landscapes,
however,
the
exact
mechanisms
of
these
impacts
are
unknown.
In
this
study
we
adopted
a
modelling
approach
predict
multiple
effects
climate
on
hydrological
and
biogeochemical
responses
for
dominant
solutes
particulates
two
agriculture-dominated
temperate
headwater
catchments.
We
used
climatic
projections
from
three
models
simulate
future
flows,
mobilisation
delivery
particulates.
This
allowed
an
examination
potential
drivers
by
identifying
changes
flow
pathway
distribution
key
environmental
variables.
found
that
conditions
will
lead
general
increase
stream
discharge
as
well
higher
concentrations
loads
However,
unlike
previous
studies,
observed
magnitude
during
warmer
part
year.
These
reduce
relative
importance
winter
flows
solute
particulate
transport,
leading
both
more
evenly
distributed
between
seasons.
linked
superficial
pathways
tile
surface
runoff
driven
rapid
transition
extremely
wet
dry
conditions.
Overall,
widespread
deterioration.
Mitigation
deterioration
would
require
adequate
management
efforts
address
direct
indirect
negative
biota
scarcity.
Hydrological Processes,
Год журнала:
2024,
Номер
38(11)
Опубликована: Ноя. 1, 2024
ABSTRACT
We
investigate
how
seasonal
flow
variations
and
a
climatic
regime
that
is
dominated
by
the
El
Niño–Southern
Oscillation
(ENSO)
influence
Sb
flux
dynamics
in
an
Australian
river
impacted
mining.
Sampling
(
n
=
496)
spans
hydrologically
complex
7‐year
period
of
drought,
bushfires
floods
from
2016
to
2023,
during
which
17%
samples
exceeded
drinking
water
guideline
concentration
(3
μg
L
−1
).
Aqueous
(Sb
Aq
)
concentration–discharge
C
–
Q
relationships
are
non‐continuous/non‐linear
across
range,
with
chemodynamic
behaviour
at
moderate
flows
reflecting
hydrological
connection
primary
Sb‐source
area
combined
variable
dilution.
In
contrast
chemostatic
occurred
extreme
low
high
flows,
disconnection
source
persistent
dilution,
respectively.
was
significantly
positively
correlated
p
<
0.01,
Spearman's
ρ
0.58)
index
representing
proportional
contribution
sub‐catchment
mineral‐field
area,
suggesting
sufficient
localised
rainfall
mining‐impacted
contributes
downstream
peaks
concentrations.
particulate
P
annual
loads
study
spanned
24–5174
1.2–2820
kg,
respectively
were
strongly
dependant
interannual
variability
dry
wet
years.
extrapolate
daily
load‐daily
discharge
d
for
estimate
over
53‐year
(1970–2023)
continuous
data
(mean
total
1865
kg
±
[SE]
247).
Positive
correlations
between
Southern
Index
both
0.05)
53
years
suggests
ENSO
fluctuations
transport
dynamics.
Upstream
load
estimates
correspond
coastal
floodplain
sedimentary
mass,
approximately
10%–45%
estimated
exported
since
1880
accumulated
on
Macleay
floodplain.
Data
suggest
current
rates
export,
complete
flushing‐leaching
mine
tailings‐derived
upper
catchment
may
take
order
600–1000
