Environmental Research,
Journal Year:
2024,
Volume and Issue:
262, P. 119859 - 119859
Published: Aug. 27, 2024
This
study
used
dual
stable
isotopes
to
examine
nitrate
sources
and
geographical
distribution
in
the
Liao
River
Basin
(LRB),
one
of
China's
seven
major
river
basins.
During
a
normal
hydrological
season
April
2021,
water
samples
were
taken
from
main
streams
(MLR),
Shuangtaizi
(STR),
Hun
(HR),
Taizi
(TZR),
Daliao
(DLR).
Monitoring
results
indicated
that
93%
had
total
nitrogen
level
exceeding
Class
IV
limit
(1.5
mg/L)
'Environmental
Quality
Standards
(EQS)
for
surface
water',
indicating
serious
pollution
status.
71.3%
on
average
was
form
nitrate.
The
scatterplots
δD-H
Sustainability,
Journal Year:
2024,
Volume and Issue:
16(15), P. 6580 - 6580
Published: Aug. 1, 2024
Jinan,
renowned
as
the
“Spring
City”
in
China,
relies
significantly
on
karst
groundwater
an
indispensable
resource
for
socio-economic
development,
playing
a
crucial
role
ecological
regulation,
tourism,
and
historical
cultural
aspects.
The
Yufu
River
basin,
situated
within
Jinan’s
region,
represents
vital
riverine
leakage
zone.
Therefore,
investigating
evolutionary
characteristics
causative
mechanisms
of
surface
water
at
different
aquifer
levels
basin
can
provide
scientific
foundation
protection
springs.
This
study,
based
hydrogeochemical
isotopic
data
from
river
water,
shallow
groundwater,
deep
springs
explored
evolution
this
region.
findings
revealed
significant
spatial
variations
hydrochemical
parameters
basin.
Groundwater
received
contributions
while
represented
mixture
both
various
recharge
aquifers.
Dominant
ions
include
Ca2+
HCO3−,
with
prevailing
types
being
HCO3·SO4-Ca
HCO3-Ca.
Atmospheric
precipitation
served
primary
source
albeit
influenced
by
pronounced
evaporation
processes.
composition
was
primarily
attributed
to
water–rock
interactions,
mainly
driven
combined
effects
carbonate
rock,
silicate
gypsum
weathering
dissolution.
Among
these,
dissolution
rocks
played
dominant
role,
human
activities
exerting
relatively
minor
influence
hydrochemistry
Water,
Journal Year:
2024,
Volume and Issue:
16(17), P. 2519 - 2519
Published: Sept. 5, 2024
Groundwater
represents
a
critical
resource
for
sustaining
the
livelihoods
of
both
urban
and
rural
populations,
facilitating
economic
social
development,
preserving
ecological
equilibrium.
This
study
leverages
groundwater
quality
monitoring
data
from
northern
Baiquan
spring
basin
(NBSB)
to
elucidate
hydrochemical
characteristics
decipher
temporal
variability
in
water
quality.
Findings
suggest
that
within
NBSB
is
predominantly
weakly
alkaline
characterized
as
hard-fresh,
with
HCO3−
Ca2+
predominant
ions,
which
collectively
demarcate
type
HCO3-Ca.
The
principal
constituents
are
influenced
by
weathering
carbonates
silicates
alongside
dissolution
gypsum
halite.
Moreover,
agricultural
operations
similar
human
activities
have
exerted
an
impact
on
attributes
NBSB’s
groundwater.
Generally,
fluctuations
anion
concentrations
over
time
more
pronounced
than
those
cations,
exemplified
significant
upward
trend
major
ion
at
BQ03
site
later
stages.
While
general
deemed
satisfactory,
most
sites
experienced
escalation
indices
time,
notably
BQ03,
warrants
serious
attention.
findings
this
research
contribute
efficient
management
sustainable
utilization
resources
NBSB.
Environmental Research,
Journal Year:
2024,
Volume and Issue:
262, P. 119859 - 119859
Published: Aug. 27, 2024
This
study
used
dual
stable
isotopes
to
examine
nitrate
sources
and
geographical
distribution
in
the
Liao
River
Basin
(LRB),
one
of
China's
seven
major
river
basins.
During
a
normal
hydrological
season
April
2021,
water
samples
were
taken
from
main
streams
(MLR),
Shuangtaizi
(STR),
Hun
(HR),
Taizi
(TZR),
Daliao
(DLR).
Monitoring
results
indicated
that
93%
had
total
nitrogen
level
exceeding
Class
IV
limit
(1.5
mg/L)
'Environmental
Quality
Standards
(EQS)
for
surface
water',
indicating
serious
pollution
status.
71.3%
on
average
was
form
nitrate.
The
scatterplots
δD-H
