Forests,
Journal Year:
2024,
Volume and Issue:
15(12), P. 2187 - 2187
Published: Dec. 12, 2024
The
arid
region
of
Northwest
China
(ARNC)
is
responsive
to
global
climate
change,
and
drought
events
have
occurred
frequently
in
recent
decades.
However,
studies
about
the
effect
meteorological
stress
on
vegetation
change
ARNC
are
still
insufficient.
In
this
study,
we
analyzed
spatiotemporal
trends
factors
(temperature,
TMP;
precipitation,
PRE;
standardized
precipitation
evapotranspiration
index,
SPEI),
(vapor
pressure
deficit,
VPD;
soil
moisture,
SM),
(normalized
difference
NDVI)
during
1982–2021.
We
also
investigated
characteristics
by
run
theory,
including
times,
duration,
severity,
intensity.
impacts
were
explored
using
Pearson
correlation
analysis
structural
equation
model
(SEM).
found
that
annual
growing
season
TMP,
PRE,
VPD,
SM,
NDVI
showed
an
increasing
trend
contrast,
SPEI
exhibited
a
decreasing
season.
addition,
varied
significantly
ARNC.
primarily
Tarim
River
Basin,
Turpan-Hami
Hexi
Corridor.
SEM
results
consistently
demonstrated
TMP
SM
exerted
greater
growth
than
SPEI.
determine
PRE.
Exploration
influence
essential
for
comprehending
dominant
change.
Remote Sensing,
Journal Year:
2024,
Volume and Issue:
16(24), P. 4778 - 4778
Published: Dec. 21, 2024
The
Loess
Plateau
(LP)
in
China
is
an
ecologically
fragile
region
that
has
long
faced
challenges
such
as
soil
erosion,
water
shortages,
and
land
degradation.
spatial
temporal
variations
ecological
environment
quality
on
the
LP
from
2000
to
2020
were
analyzed
using
Remote
Sensing
Ecological
Index
(RSEI)
Google
Earth
Engine
(GEE)
platform.
Sen,
Mann–Kendall,
Hurst
exponent
analyses
used
examine
variation
trends
over
past
20
years,
while
Geodetector
identified
key
factors
influencing
RSEI
changes
their
interactions.
results
indicate
(1)
effectively
represents
environmental
of
LP,
with
47%
study
area’s
annual
mean
values
20-year
period
classified
moderate,
ranging
0.017
0.815.
(2)
showed
improvement
72%
area,
a
90%
overall
increase,
but
84%
these
are
not
likely
continue.
(3)
Key
during
abrupt
change
years
included
precipitation,
use/land
cover,
sediment
content,
precipitation
topography
emerging
primary
influences
quality.
Although
natural
largely
drive
changes,
human
activities
also
exert
both
positive
negative
effects.
This
underscores
importance
sustainable
management
provides
policy
insights
for
advancing
civilization
contributing
achievement
Sustainable
Development
Goals
(SDGs).
Frontiers in Earth Science,
Journal Year:
2025,
Volume and Issue:
12
Published: Jan. 13, 2025
In
recent
years,
geological
disasters
on
loess
fill
slopes
have
occurred
from
time
to
time,
which
has
attracted
widespread
attention.
order
deeply
understand
its
deformation
and
failure
laws
promote
the
disaster
prevention
mitigation
work,
this
paper
takes
remolded
as
research
object,
systematically
explores
effects
of
three
different
stress
paths
(conventional
triaxial
compression
test
(CTC),
with
constant
average
principal
(TC),
reduced
confining
pressure
(RTC))
mechanical
properties,
observes
analyzes
microstructural
characteristics
by
scanning
electron
microscopy
(SEM).
The
results
show
that
soil
is
strain
hardening
under
CTC
path,
while
it
weak
TC
RTC
paths.
CTC,
TC,
paths,
shear
strength
volume
shrinkage
are
in
turn,
both
reduction
expansion
plastic
deformation.
degree
particle
crushing
decreases
turn
pore
content
increases
turn.
It
inferred
initial
loading,
compressed
compacted,
improved
a
certain
extent.
As
loading
continues
increase,
rate
steadily,
develops
gradually,
mainly
axial
deformation,
lateral
bulging
small
until
destroyed.
For
behavior
form
unloading,
maintained
relatively
stable
state
at
beginning,
very
small.
When
constraint
critical
state,
structure
completely
unstable,
rapidly
short
This
study
great
significance
for
reducing
occurrence
areas.
Frontiers in Sustainable Development,
Journal Year:
2025,
Volume and Issue:
5(1), P. 72 - 77
Published: Jan. 21, 2025
Loess
is
a
special
soil
type,
widely
distributed
in
our
country.
However,
due
to
the
influence
of
natural
factors
and
human
activities,
loess
has
degraded,
which
negative
impact
on
ecological
environment,
agricultural
production
many
other
aspects.
This
paper
elaborated
manifestations
degradation,
such
as
erosion,
fertility
decline,
structure
destruction,
etc.,
deeply
analyzed
(including
precipitation,
wind
power,
terrain,
etc.)
(such
unreasonable
land
use,
over-reclamation,
overgrazing,
leading
proposed
series
improvement
measures
address
these
problems.
It
includes
engineering
measures,
biological
technology
aiming
at
providing
theoretical
basis
practical
guidance
for
protection
sustainable
development
area.
