Research Square (Research Square),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 18, 2024
Abstract
Danjiangkou
Reservoir
has
been
widely
concerned
as
the
water
source
of
world’s
longest
cross
basin
transfer
project.
Biogenic
elements
are
foundation
material
circulation
and
key
factors
affecting
quality.
However,
there
is
no
comprehensive
study
on
biogenic
in
tributaries
Reservoir,
hindering
a
detailed
understanding
geochemical
cycling
characteristics
this
region.
Guanshan
River,
one
main
that
directly
enter
was
token
research
object.
Spatiotemporal
distribution
basic
quality
parameters
were
studied.
Water
comprehensively
evaluated
through
index
(WQI).
Absolute
principal
component
score-multiple
linear
regression
(APCS-MLR)
model
adopted
to
explore
sources
elements.
Results
showed
that,
terms
season,
concentrations
TN,
TP,
DOC
significantly
higher
wet
season
than
dry
while
significant
differences
found
for
DIC
DSi.
Spatially,
DC,
DIC,
TN
TP
middle
lower
reaches
upstream.
concentration
peaked
reaches,
DSi
WQI
values
indicated
river
between
good
excellent,
although
slightly
worse
season.
PCA
extracted
five
potential
sources,
which
accounting
84.12%
total
variance,
including
rock
weathering,
mixed
sewage
discharge
agricultural
non-point
pollution,
dissolved
soil
CO2,
seasonal
factor
pollution.
These
contributed
38.96%,
12.33%,
13.54%,
23.95%
11.21%
parameters,
respectively.
Strengthening
monitoring
elements,
controlling
pollutant
exploring
relationship
other
pollutants
important
environment
management
basin.
