Forests,
Год журнала:
2024,
Номер
15(12), С. 2191 - 2191
Опубликована: Дек. 12, 2024
Monitoring
groundwater
pollution
is
an
important
issue
in
terms
of
analyzing
threats
to
protected,
environmentally
valuable
areas.
The
topographical
and
environmental
characteristics
a
given
area
are
often
mentioned
among
the
factors
affecting
dynamics
chemistry
groundwater.
In
this
study,
random
forest
regression
(RFR)
model
was
used
determine
spatial
distribution
selected
metals,
such
as
aluminum,
calcium,
iron,
potassium,
magnesium,
manganese,
sodium,
zinc.
role
indicators
describing
terrain
variability,
derivatives
digital
elevation
(DEM)
were
employed,
with
resolution
5
m,
topography
on
local
scale,
as,
others,
slopes,
aspect
curvatures
topographic
position
index,
SAGA
wetness
well
generalized
values
determined
for
each
sampling
point
areas
contributing
their
runoff.
addition,
parameters
taken
into
consideration:
habitat
types,
structure
soil
cover,
seasons
when
samples
collected.
This
study
collected
from
15
wells
located
forested
Wielkopolska
National
Park
seven
dates.
results
obtained
show
that
can
be
very
good
variability
concentrations
sodium
However,
case
calcium
zinc,
no
correlations
found
between
adopted
degree
importance
predictor
order
rank
modeling
concentration
metals
summary
ranking
predictors
indicates
strongest
influence
predicted
exhibited
by
profile
curvatures,
planar
multiscale
TPI,
then
type
forest.
On
other
hand,
curvature
classifications,
composition,
seasonality
exhibit
smallest
impact
modeling.
Environmental Science & Technology,
Год журнала:
2024,
Номер
58(33), С. 14687 - 14697
Опубликована: Авг. 8, 2024
As
global
change
processes
modify
the
extent
and
functions
of
terrestrial–aquatic
interfaces,
variability
critical
dynamic
transitional
zones
between
wetlands
uplands
increases.
However,
it
is
still
unclear
how
fluctuating
water
levels
at
these
boundaries
alter
groundwater
biogeochemical
cycling.
Here,
we
used
high-temporal
resolution
data
along
gradients
from
to
during
freshwater
coastal
areas
capture
spatiotemporal
patterns
redox
potential
(Eh).
We
observed
that
topography
influences
Eh
higher
in
than
wetlands;
however,
high
within
TAI
challenged
establishment
distinct
zonation.
Declining
generally
decreased
Eh,
but
most
locations
exhibited
significant
variability,
which
associated
with
rare
instances
short-term
level
fluctuations,
introducing
oxygen.
The
Eh-oxygen
relationship
showed
hysteresis
patterns,
reflecting
poising
capacity
maintaining
more
oxidizing
states
longer
dissolved
oxygen
presence.
Surprisingly,
frequent
uplands.
infer
occasional
entering
specific
wetland–upland
acts
as
control
points.
High-resolution
can
such
yet
instances,
supporting
redox-informed
models
advancing
predictability
climate
feedback.
Environmental Science and Pollution Research,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 20, 2024
Abstract
The
eastern
Niger
Delta
region
in
Nigeria
is
a
hotspot
for
reactive
nitrogen
pollution
due
to
extensive
animal
husbandry,
pit
latrine
usage,
and
agricultural
practices.
Despite
the
high
level
of
human
activity,
sources
processes
affecting
groundwater
remain
understudied.
Groundwater
nitrate
(NO
3
−
)
concentrations
are
highly
variable,
with
some
areas
recording
values
well
above
safe
drinking
water
threshold
50
mg/L.
This
particularly
true
near
municipal
sewage
systems.
Elevated
nitrite
2
ammonium
(NH
4
+
were
also
detected
study
area.
Sewage
analysis
revealed
NO
ranging
from
1
145
mg/L,
0.2
notably
NH
concentrations.
A
comparison
major
ions
indicated
that
71%,
90%,
87%,
92%
samples
surpassed
reference
site
levels
calcium
(Ca
2+
),
sodium
(Na
potassium
(K
chloride
(Cl
respectively,
pointing
as
likely
source
contamination.
/Cl
ratios
at
several
sites
suggested
most
originates
waste.
Stable
isotope
showed
general
enrichment
15
N
and,
cases,
depletion
18
O,
indicating
sewage-derived
nitrification.
Although
denitrification,
process
reduces
,
present,
dissolved
oxygen
(DO)
suggest
denitrification
insufficient
fully
mitigate
pollution.
Consequently,
there
risk
leaching
shallow
aquifers
into
Delta’s
surface
waters
ultimately
coastal
ocean.
Agrosystems Geosciences & Environment,
Год журнала:
2025,
Номер
8(2)
Опубликована: Апрель 21, 2025
Abstract
Groundwater
contaminants
that
can
negatively
impact
human
health,
such
as
nitrate,
uranium,
arsenic,
and
manganese,
are
common
in
agricultural
areas.
The
mobility
distribution
of
these
groundwater
strongly
impacted
by
oxidation‐reduction
(redox)
processes.
redox,
however,
is
difficult
to
determine
without
conducting
time‐sensitive
geochemical
analyses.
Prior
research
demonstrated
areas
low
nitrate
concentrations
could
be
identified
the
presence
rust
on
irrigation
center
pivots.
This
“rust”
a
coating
iron
(Fe)
oxides
formed
incidental
spraying
Fe‐rich
surface
pivot.
Thus,
pivot
qualitative
indicator
reducing
conditions
where
Fe
soluble
groundwater.
Nitrate,
iron,
manganese
from
wells
associated
with
29
pivots
(16
rusted
13
non‐rusted)
central
Nebraska.
Results
indicate
significantly
higher
lower
uranium
pivots,
suggesting
link
between
redox‐sensitive
contaminants.
Most
study
area
along
eastern
edge
subcrop
Miocene
Ogallala
Group,
alluvium
overlies
Pierre
shale,
which
source
other
metals
These
results
underscore
utility
rapid,
non‐invasive
for
elements
