Research Square (Research Square),
Год журнала:
2022,
Номер
unknown
Опубликована: Ноя. 22, 2022
Abstract
Despite
the
significant
impacts
of
natural
factors
such
as
rainfall,
topography,
soil
type,
and
river
network
well
agricultural
activities
on
environmental
water
quality,
little
is
known
about
influence
their
temporal
spatial
variations
in
a
fluvial-lacustrine
watershed.
In
this
study,
whole
process
accounting
method
based
export
coefficient
model
(WP-ECM)
was
first
developed
to
quantify
how
distribution
influenced
quality.
A
case
study
performed
typical
area
–Dongting
basin,
China.
The
simulated
results
indicated
that
can
promote
migration
transformation
pollutants
generated
from
watershed
displayed
high
variability.
It
should
be
priority
monitor
areas
with
greater
impact
basin.
Moreover,
cultivated
land
number
pig-breeding
were
positively
correlated
pollutant
discharge,
it
an
important
measures
reduce
control
anthropological
high-impact
areas.
From
perspective
comprehensive
influence,
are
mainly
distributed
Dongting
Lake
district
2005–2010
Xiang
River
2010–2020.
key
strategy
for
controlling
or
reducing
intensity
livestock
breeding
these
high-impacts
areas,
especially
watershed,
quality
entire
Water,
Год журнала:
2025,
Номер
17(3), С. 407 - 407
Опубликована: Фев. 1, 2025
Karst
aquifers
in
the
Mediterranean
region
are
crucial
for
water
supply
and
agriculture
but
increasingly
threatened
by
climate
change
overexploitation.
The
Jebel
Zaghouan
aquifer,
historically
significant
supplying
Carthage
Tunis,
serves
as
focus
of
this
study,
which
aims
to
evaluate
its
availability,
quality,
vulnerability
ensure
long-term
sustainability.
To
achieve
this,
various
methods
were
employed,
including
APLIS
COP
recharge
assessment
mapping,
SPEI
SGI
drought
indices,
stable
radioactive
isotope
analysis.
findings
revealed
severe
groundwater
depletion,
primarily
caused
overexploitation
linked
urban
expansion.
Minimal
was
observed,
even
during
wet
periods.
analysis
indicated
moderate
infiltration
rates,
consistent
with
prior
reservoir
models
MEDKAM
map.
Isotopic
highlighted
from
Atlantic
mixed
rainfall,
while
Tritium
Carbon-14
dating
showed
a
mix
ancient
recent
water,
emphasizing
aquifer’s
complex
hydrodynamics.
mapping
classified
80%
area
moderately
vulnerable.
Monitoring
nitrate
levels
fluctuations,
peaks
years
at
Sidi
Medien
Spring,
necessitating
control
measures
safeguard
quality
amid
agricultural
activities.
This
study
provides
valuable
insights
into
dynamics,
guiding
sustainable
management
preservation
efforts.
Abstract
High-altitude
karst
basins,
as
vital
components
of
the
"Asian
Water
Tower,"
are
critical
for
water
resource
conservation
on
Qinghai-Tibet
Plateau.
To
investigate
hydrochemical
evolution
characteristics
Yepuqu
River
Basin,
we
analyzed
23
samples
(snowmelt,
groundwater,
and
surface
water)
using
hydrochemistry,
hydrogen-oxygen
isotopes,
mass
balance
principles,
principal
component
analysis
(PCA).
Results
showed
that
types
predominantly
HCO3—Ca
HCO3·SO4—Ca.
Ion
diagrams
indicated
mineralization
was
primarily
controlled
by
rock
weathering
dissolution,
with
additional
contributions
from
cation
exchange.
PCA
further
reveals
is
influenced
carbonate
mineral
evaporite
anthropogenic
activities.
Isotopic
demonstrated
originated
atmospheric
precipitation
(8%),
snowmelt
(74%),
groundwater
(18%),
dynamic
mutual
transformation
between
water,
accompanied
intense
water-rock
interactions
evaporation.
Through
comparison
results
chemical
similar
alpine
it
found
strength
human
activities
directly
affects
differences
in
evolution.
The
study
provides
first
comprehensive
high-altitude
basin
River,
enhancing
theoretical
foundation
protection
Lhasa
Basin
offering
crucial
data
to
advance
research
water-groundwater
cycling
systems.
