Ground Water,
Journal Year:
2023,
Volume and Issue:
61(6), P. 895 - 913
Published: Sept. 30, 2023
The
Maocun
underground
karst
river
system
in
the
peak
cluster
depression
is
an
important
source
of
groundwater
southwest
China.
Multitracers
and
high
resolution
water-level-monitoring
technology
were
used
to
assess
evaluate
hydrogeological
structure
flow
dynamics.
results
showed
that
spatial
geological
structures
sites
had
heterogeneity.
Scatter
plots
environmental
tracers
divided
sampling
points
into
groups
under
different
water
patterns.
karstification
was
found
increase
from
XLB
LLS
BY,
SGY
BDP
CY
DYQ,
where
main
patterns
at
these
site
diffuse
water,
both
conduit
respectively.
response
times
subsystems
be
influenced
by
structure,
degree
karstification,
volume
precipitation
frequency.
average
SGY,
BDP,
ZK,
Outlet
selected
scenarios
5.17,
4.08,
16.42,
5.83
h,
In
addition,
EC,
δ13
CDIC
,
222
Rn,
δ18
O
exhibited
linear
or
exponential
relationships.
Overall,
three
conceptual
models
constructed
showing:
(1)
driving
deep
resulting
a
concentrated
regime
regional
field;
(2)
flows
existing
moderate
precipitation,
mixed
(3)
cycle
shallow
aquifer
low
causing
local
field
dominated
flow.
Trace
elements,
along
with
major
ions
and
environmental
isotopes,
serve
as
valuable
tracers
in
carbonate
aquifers.
The
primary
objectives
of
this
study
are
to
assess
the
degree
karstification,
hydraulic
connections,
hydro-chemical
environment
within
Yangzhuang
karst
groundwater
basin.
slope
values
ρ(Sr)
relation
ρ(SiO2)
areas
increasing
conductivity
suggest
its
potential
a
karstification
indicator.
between
ions,
well
trace
demonstrated
rapid
decrease
from
Shanting
fault
block
block.
Additionally,
ρ(Sr)/ρ(Ca2+)
ρ(Sr)/ρ(Mg2+)
ratios
increased
upstream
downstream,
indicating
heightened
development
enhanced
connections
blocks.
Values
k,
ρ(Sr),
δD,
δ18O,
δ13CDIC
exhibited
an
trend
depth.
Sr
content
similar
majors
both
horizontally
vertically.
87Sr/86Sr
signatures
conjunction
δ15NNO3,
δ18ONO3,
indicate
that
is
influenced
by
geological
formations
human
activities,
chemical
fertilizer
used
agricultural
activities
being
factor.
isotopes
function
similarly
elucidating
hydrogeochemical
hydrodynamic
attributes
These
insights
could
be
incorporated
into
hydrogeological
studies
complex
Water,
Journal Year:
2023,
Volume and Issue:
15(4), P. 802 - 802
Published: Feb. 18, 2023
This
study
collected
31
water
samples
from
the
Tongzi
River,
Guizhou
Province,
Southwest
China
to
conduct
a
risk
assessment
understand
hydrochemical
characteristics
and
major
ion
sources
of
irrigation
drinking
quality
their
effects
on
human
health.
The
results
showed
that
abundance
in
River
is
Ca2+
(66%)
>
Mg2+
(24%)
K++Na+
(10%)
for
cations
HCO3−
(75%)
SO42−(21%)
Cl−
(4%)
anions.
Additionally,
type
Ca-Mg-HCO3,
controlled
by
carbonate
weathering.
Methods
including
ratios,
principal
component
analysis
(PCA),
correlation
(CA)
were
used
analyze
source
main
ions
river
water.
PC1,
with
most
significant
variance
(54.9%),
decides
affected
positive
loadings
SO42−
(0.92),
pH
(0.85),
(0.80),
(0.72),
Na+(0.66),
NO3−
(0.65),
K+
(0.57).
PC2
explains
19.2%
total
variance,
strong
Na+
(0.75),
(0.63)
(0.59).
(0.84)
(0.85)
exhibits
high
PC3,
explaining
9.3%
variance.
intensive
agricultural
activities
basin
nitrate
NO3−,
whereas
was
mainly
derived
mining
activities.
lower
concentrations
Na+,
K+,
coal
combustion,
domestic
wastewater
discharge,
fertilizer
applications.
area
rock
weathering;
natural
processes
(mainly
weathering
rocks)
still
origin
Ca2+,
Mg2+,
HCO3−.
Moreover,
United
States
Salinity
Laboratory
(USSL)
diagram
Wilcox
100%
fell
C2S1
zones,
had
good
suitability
irrigation.
health
(HRA)
HQNO3−
much
larger
than
HQNH4+
indicated
pollution
dominated
non-health
hazards.
About
6.5%
tributaries
represented
an
unacceptable
infants
children,
HQ
value
children
always
higher
adults.
non-carcinogenic
riverine
very
noteworthy,
especially
tributaries.
