Abstract.
Vegetation
restoration
is
one
of
the
most
effective
measures
to
control
runoff
and
sediment
by
human
management.
Nevertheless,
few
studies
have
been
undertaken
objectively
analyze
effectiveness
effects
plant
on
regional
water
availability,
especially,
in
mixed-cultivated
grasslands
alpine
degraded
hillsides.
In
this
research,
we
carried
out
in
situ
monitoring
using
micro-plots
investigate
impact
three
strategies,
combining
two
grass
species
per
plot
(three
total),
a
20-degree
slope
activation
volume
surface
soil
loss
hillsides
for
years
(2019,
2020
2022).
A
bare-soil
was
used
as
control.
The
findings
indicated
that
can
effectively
conserve
decrease
along
increasing
planting
ages.
Grass
community
Deschampsia
cespitosaPoa
pratensis
L.cv.
Qinghai
reducing
erosion.
From
2019
2022,
values
reduction
ratio
decreased
Elymus
nutans
(DE),
(PE),
(PD)
from
-79.3
%
-115.4
%,
-130.4
-156.1
-48.5
-87.6
respectively.
On
contrary,
mean
erosion
cultivated
communities
increased
-184.8
18.0
(in
DE),
-231.5
24.3
PE),
-139.3
31.9
PD),
respectively,
2022;
corresponding
concentration
also
-120.9
55.8
-from
112.4
59.7
-94.3
62.1
PD).
This
implied
protection
should
be
considered
priority
during
initial
stage
grassland
key
factors
affecting
were
rainfall
amount,
duration
intensity
(60-min
intensity).
We
conclude
results
study
serve
scientific
guides
design
efficient
policy
decisions
planning
vegetation
severely
hillside
grasslands.
Advances in Climate Change Research,
Год журнала:
2024,
Номер
15(3), С. 476 - 489
Опубликована: Март 11, 2024
Freeze‒thaw
induced
landslides
(FTILs)
in
grasslands
on
the
Tibetan
Plateau
are
a
geological
disaster
leading
to
soil
erosion.
However,
conventional
techniques
for
regional-scale
mapping
of
FTILs
impractical
because
they
labor-intensive,
expensive,
and
time-consuming.
This
study
focuses
improving
detection
by
utilizing
image
fusion-based
Google
Earth
Engine
(GEE)
random
forest
algorithm.
Integration
various
data
sources,
including
texture
features,
index
spectral
slope,
vertical‒vertical
polarization
data,
allow
automatic
spatial
distribution
characteristics
Zhidoi
county,
which
is
located
within
Qinghai‒Tibet
engineering
corridor
(QTEC).
We
employed
statistical
elucidate
mechanisms
influencing
occurrence.
The
fusion
method
identifies
two
schemes
that
achieve
high
accuracy
using
smaller
training
sample
(scheme
A:
94.1%;
scheme
D:
94.5%)
compared
other
methods
B:
50.0%;
C:
95.8%).
approach
effective
generating
accurate
results
only
10%
size
required
methods.
patterns
generated
2021
similar
those
obtained
with
primary
concentration
observed
along
central
region
traversed
QTEC.
highlight
slope
as
most
crucial
feature
images,
it
accounts
93%
occurring
gentle
slopes
ranging
from
0°
14°.
provides
theoretical
basis
technological
reference
identification,
monitoring,
prevention
control
grasslands,
potential
benefit
grassland
ecosystem
management,
reduce
economic
losses,
promote
sustainability.
Land Degradation and Development,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 21, 2024
ABSTRACT
The
crucial
role
of
soil
water
retention
and
storage
in
hydrology
the
cycle
is
well
established.
However,
sensitive
degraded
ecosystems
like
alpine
meadows,
effectiveness
revegetation
enhancing
these
critical
functions
remains
understudied.
This
study
investigates
effects
revegetating
severely
hillside
meadows
with
artificial
grasslands
on
capacity
Qinghai‐Tibetan
Plateau.
Soil
analyses
at
a
depth
0–20
cm
revealed
significant
improvements
properties
after
revegetation,
increases
organic
matter
content
(86.8%),
total
porosity
(11.9%),
capillary
(31.6%),
clay
(13.5%).
Both
saturated
hydraulic
conductivity
(
Ks
)
field
(FC)
increased
markedly,
by
9.7%
63.7%
upper
layer
(0–10
cm)
21.7%
69.6%
lower
(10–20
cm),
respectively.
Structural
equation
modeling
identified
bulk
density,
root
mass
FC,
porosity,
as
dominant
direct
factors
influencing
path
coefficients
−0.56,
0.30,
−0.53,
0.57,
−0.12,
respectively,
while
vegetation
cover
aboveground
biomass
were
found
to
have
indirect
influences.
These
findings
demonstrate
that
effectively
improves
regulating
key
physical
properties.
enhanced
water‐holding
has
implications
for
understanding
dynamics
grassland
establishment
improving
ecosystem
health
eco‐hydrological
vulnerable
environments.
Furthermore,
provides
valuable
insights
theoretical
basis
developing
ecological
restoration
solutions
other
regions.
Abstract
Degradation
of
hillside
alpine
meadow
ecosystems
is
a
widespread
problem
that
usually
results
in
the
fragmentation
mattic
epipedon
(ME).
The
plays
well‐known
role
hydrological
cycle
due
to
its
high
water‐holding
capacity.
However,
little
known
about
how
ME
alters
soil
infiltrability—a
key
property
influences
runoff
and
erosion
processes
as
well
moisture
dynamics.
To
address
this
issue,
we
contrasted
infiltration
rates
plant
characteristics
preserved
patches
(with
full
ME)
at
two
stages
fragmentation,
namely,
half
without
ME.
Our
showed
reduced
aboveground
biomass
(mainly
sedges)
by
58.6–65.6
g
m
−2
root
5,643–10,054
.
Soil
compressive
strength
(11.6
kg
cm
)
total
porosity
(52%)
fragmented
were
significantly
lower
than
those
with
(17.9
62%,
respectively)
or
(31.7
62.5%,
respectively).
In
contrast,
non‐capillary
aggregate
stability
slightly
increased
highest
Importantly,
meadows
greatly
result
fragmentation.
Initial
approximately
10
20
times
higher
(177
mm
h
−1
326
,
(17
).
Moreover,
steady‐state
6
9
(60
88
Overall,
improved
infiltrability
changing
characteristics.
These
findings
suggest
will
maintenance
have
drastic
effects
on
water
provisioning
function
Qinghai‐Tibetan
Plateau.
