BIO Web of Conferences,
Год журнала:
2024,
Номер
140, С. 02012 - 02012
Опубликована: Янв. 1, 2024
The
environment
is
an
increasingly
debated
topic
in
international
society,
politics
and
the
media.
This
all
more
true
context
of
climate
change,
which
readily
apparent
every
year.
processes
associated
with
change
strongly
influence
state
shape
we
humans
are
integral
part.
factor
dramatic
population
growth
also
intervenes
situation.
object
study
Central
Asia
extreme
climatic
conditions.
has
a
negative
impact
on
living
conditions,
health
development.
Agricultural
production
main
branch
economy
Asian
republics.
related
threats
affect
economic
situation
region.
Human
activities
have
condition
whole
Inefficient
unsustainable
management
agriculture
water
resources
cause
unfavourable
Environment
security
seen
as
two
inseparable
areas
that
interact
environmental
management.
Forests,
Год журнала:
2025,
Номер
16(3), С. 505 - 505
Опубликована: Март 12, 2025
Yunnan
Province,
as
a
critical
ecological
security
barrier
in
China,
has
long
been
highly
susceptible
to
drought
events.
Characterizing
the
spatiotemporal
distributions
of
and
identifying
its
driving
factors
is
crucial.
Due
complexity
occurrence,
linear
correlation
analysis
alone
insufficient
quantify
drivers
their
interactions.
This
study
used
Standardized
Precipitation
Evapotranspiration
Index
(SPEI)
indicator
analyze
trends
across
six
major
river
basins.
The
geographic
detector
model
(GDM)
random
forest
(RF)
were
utilized
impacts
meteorological,
topographical,
soil,
human
activities
on
drought,
well
interactions
among
these
factors.
results
showed
that
63.61%
area
exhibits
significant
drying
trend
(p-value
<
0.05),
with
Jinsha
River
Basin
(JSRB)
experiencing
highest
frequency
extreme
(PRE),
temperature,
potential
evapotranspiration
(PET),
vapor
pressure
deficit
(VPD),
relative
humidity
(RH)
identified
primary
controlling
factor
displaying
nonlinear
enhancement
effects.
PRE
plays
dominant
role
Yunnan,
whereas
elevation
primarily
influenced
severity
JSRB,
Lancang
(LCRB),
Nujiang
(NJRB).
RF-based
SPEI
prediction
demonstrated
superior
performance
simulating
short-term
(SPEI_1,
R2
>
0.931,
RMSE
0.279),
particularly
JSRB
(R2
=
0.947
0.228).
These
findings
provide
scientific
basis
for
regional
water
resource
management
applications
early
warning
systems,
offering
robust
framework
understanding
mitigating
ecologically
sensitive
regions.
Agronomy,
Год журнала:
2024,
Номер
14(9), С. 1987 - 1987
Опубликована: Сен. 2, 2024
Meteorological
and
agricultural
droughts
are
inherently
correlated,
whereas
the
propagation
mechanism
between
them
remains
unclear
in
Northwestern
China.
Investigating
linkages
these
drought
types
identifying
potential
influencing
factors
is
crucial
for
effective
water
resource
management
mitigation.
This
study
adopted
Standardized
Precipitation
Evapotranspiration
Index
(SPEI)
Soil
Moisture
(SSMI)
to
characterize
meteorological
from
1960
2018.
The
time
was
detected
using
Pearson
correlation
analysis,
cross-wavelet
transform
wavelet
cross-correlation
were
utilized
describe
their
across
time–frequency
scales.
grey
relational
analysis
applied
explore
time.
results
revealed
that
typically
lagged
behind
by
an
average
of
6
months
China,
with
distinct
seasonal
regional
characteristics.
shortest
occurred
summer
(3
months),
followed
autumn
(4
longer
winter
(8
months)
spring
(9
months).
Additionally,
plateau
climate
zone
than
southeastern
(6
westerly
There
a
multi-timescale
response
droughts,
relatively
stable
significant
positive
over
long
timescales,
less
clear
short
timescales.
key
soil
moisture,
elevation,
precipitation,
evapotranspiration.
Furthermore,
high,
lag
0
3
months;
as
timescale
increased,
fluctuation
period
also
increased.
