Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Nov. 23, 2024
As
one
of
the
major
geological
disasters
in
southeastern
China,
typhoon-induced
vegetation
slope
instability
causes
significant
loss
life
and
property
each
year.
Despite
criticality
this
issue,
response
mechanism
vegetated
slopes
to
wind
loading
terms
soil
deformation
stability
still
remains
unclear.
This
research
conducted
field
investigations
on
330
historical
landslides
Yongjia
County,
Zhejiang
Province,
analyzing
their
spatiotemporal
distribution
developmental
characteristics
establish
a
conceptual
model.
The
influence
conditions
dynamic
parameters
strength
were
subsequently
determined
through
numerical
simulations
using
FLAC3D
software,
model
tests,
direct
shear
tests.
results
show
that:
(1)
is
significantly
affected
by
speed.
At
forces
≤
12
(hurricane:
32.7-36.9
m/s),
plays
positive
role
enhancing
stability.
≥
13
(typhoon:
37.0-41.4
exerts
negative
under
combined
action
strong
loads.
(2)
Based
experimentally
evolution
parameters,
formula
c
(v,
w)
was
fitted
express
variation
cohesion
with
speed
(v)
moisture
content
(w).
(3)
optimized
evaluation
demonstrates
increased
sensitivity
compared
traditional
model,
resulting
17.88%
increase
sliding
force
10.62-11.64%
anti-sliding
force.
accounts
for
both
indirect
effects
slopes.
findings
are
expected
enhance
assessment
winds
facilitate
development
more
accurate
machine
learning
statistical
models
future.
Physics of Fluids,
Journal Year:
2025,
Volume and Issue:
37(2)
Published: Feb. 1, 2025
A
comprehensive
review
is
conducted
on
the
application
of
Lagrangian
mesh-free
methods
for
simulating
flows
in
various
types
porous
media,
ranging
from
fixed
structures
like
coastal
breakwaters
to
deformable
and
transportable
media.
Deformable
media
refer
soil
that
may
deform
under
influence
currents
waves,
while
involve
processes
such
as
sediment
transport
scour
around
hydraulic,
coastal,
ocean
structures.
This
addresses
problem
dimensionality,
governing
equations,
domain
discretization
schemes,
interaction
mechanisms,
applications.
The
literature
analysis
reveals
numerical
techniques
have
been
employed
model
complex
between
fluid
solid
phases,
not
all
are
physically
or
mathematically
justifiable.
However,
some
approaches
significantly
advanced
modeling
process
over
past
two
decades.
Based
these
findings,
a
framework
proposed
guide
construction
models
flow
interactions
with
natural
engineered
It
highlights
effective
approaches:
(i)
Three-dimensional
(3D)
pore-scale
microscopic
through
large-sized
particles
using
coupled
smoothed
particle
hydrodynamics
(SPH)
discrete
element
method
(DEM),
(ii)
two-dimensional
(2D)
macroscopic
small-sized
mixture
theory
SPH.
mixture-theory-based
particularly
large-scale
simulations
SPH-DEM
coupling
enable
precise
fluid–solid
interactions.
serves
researchers
developing
simulate
engineering
Journal of Environmental Management,
Journal Year:
2025,
Volume and Issue:
380, P. 124972 - 124972
Published: March 23, 2025
The
Mahananda
River
basin,
located
in
Eastern
India,
faces
escalating
flood
risks
due
to
its
complex
hydrology
and
geomorphology,
threatening
socioeconomic
environmental
stability.
This
study
presents
a
novel
approach
susceptibility
(FS)
mapping
updates
the
region's
inventory.
Multitemporal
Sentinel-1
(S1)
SAR
images
(2020-2022)
were
processed
using
U-Net
transfer
learning
model
generate
water
body
frequency
map,
which
was
integrated
with
Global
Flood
Dataset
(2000-2018)
refined
through
grid-based
classification
create
an
updated
Eleven
geospatial
layers,
including
elevation,
slope,
soil
moisture,
precipitation,
type,
NDVI,
Land
Use
Cover
(LULC),
wind
speed,
drainage
density,
runoff,
used
as
conditioning
factors
(FCFs)
develop
hybrid
FS
approach.
integrates
Fuzzy
Analytic
Hierarchy
Process
(FuzzyAHP)
six
machine
(ML)
algorithms
models
FuzzyAHP-RF,
FuzzyAHP-XGB,
FuzzyAHP-GBM,
FuzzyAHP-avNNet,
FuzzyAHP-AdaBoost,
FuzzyAHP-PLS.
Future
trends
(1990-2030)
projected
CMIP6
data
under
SSP2-4.5
SSP5-8.5
scenarios
MIROC6
EC-Earth3
ensembles.
SHAP
algorithm
identified
LULC,
type
most
influential
FCFs,
contributing
over
60
%
susceptibility.
Results
show
that
31.10
of
basin
is
highly
susceptible
flooding,
western
regions
at
greatest
risk
low
elevation
high
density.
projections
indicate
30.69
area
will
remain
vulnerable,
slight
increase
SSP5-8.5.
Among
models,
FuzzyAHP-XGB
achieved
highest
accuracy
(AUC
=
0.970),
outperforming
FuzzyAHP-GBM
0.968)
FuzzyAHP-RF
0.965).
experimental
results
showed
proposed
can
provide
spatially
well-distributed
inventory
derived
from
freely
available
remote
sensing
(RS)
datasets
robust
framework
for
long-term
assessment
ML
techniques.
These
findings
offer
critical
insights
improving
management
mitigation
strategies
basin.
