Land,
Journal Year:
2024,
Volume and Issue:
13(12), P. 2050 - 2050
Published: Nov. 29, 2024
Drought
propagation
is
a
complex
process,
and
understanding
the
mechanisms
of
meteorological
drought
to
soil
crucial
for
early
warning,
disaster
prevention,
mitigation.
This
study
focuses
on
eight
tributaries
in
upper
reaches
Shiyang
River.
Based
Standardized
Precipitation
Index
(SPI)
Soil
Moisture
(SSMI),
Propagation
Intensity
(DIP)
Copula
function
were
applied
quantify
intensity
time
from
explored
patterns
at
different
temporal
spatial
scales
these
tributaries.
Results
showed
that,
0–10
cm
layer,
was
peer-to-peer,
with
one
month.
In
middle
(10–40
cm)
deep
(40–100
layers,
characteristics
differed
between
eastern
western
The
experienced
stronger
shorter
times
(2–4
months),
while
exhibited
peer-to-peer
longer
(4–10
months).
large
areas
forests
grasslands
River
contributed
strong
land–atmosphere
interactions,
leading
layer.
had
extensive
cultivated
land,
where
irrigation
during
enhanced
moisture,
resulting
layers.
contrast,
tributaries,
larger
forest
widespread
permafrost,
high
water
consumption
limited
recharge
10–40
40–100
propagation.
Water,
Journal Year:
2024,
Volume and Issue:
16(10), P. 1426 - 1426
Published: May 16, 2024
Drought
is
one
of
the
most
frequent
types
natural
disasters
in
world,
and
it
has
been
classified
into
several
different
categories.
Generally,
meteorological
drought
considered
to
be
beginning
a
disaster,
while
socio-economic
possible
ultimate
result.
However,
controversy
remains
around
main
impact
factors
propagation
from
over
past
decades.
In
this
study,
comprehensive
investigation
2022
event
city
Lishui,
China
was
conducted
build
model
for
analyzing
drought.
The
results
showed
that
had
great
on
city’s
activities.
According
governmental
reports
basic
information
water
sources,
random
forest
attribution
analysis
built.
demonstrated
performance
distinguishing
whether
occurred,
with
an
accuracy
0.9935,
true
positive
rate
0.9489
false
0.0021.
Additionally,
variables
related
sources—including
drainage
area,
covered
population
daily
supply
volume—were
found
more
important
than
other
conditions
model,
meaning
capacity
sources
factor
between
words,
feasible
prevent
through
conservancy
engineering
construction.
Remote Sensing,
Journal Year:
2024,
Volume and Issue:
16(16), P. 3033 - 3033
Published: Aug. 18, 2024
Persistent
droughts
pose
a
threat
to
agricultural
production,
and
the
changing
environment
worsens
risk
of
drought
exposure.
Understanding
propagation
in
environments
assessing
possible
impact
factors
can
help
early
detection
drought,
guiding
production
practices.
The
current
study
cannot
reflect
status
total
terrestrial
hydrological
so
this
work
creatively
investigated
atmospheric
time
Yangtze
River
Basin
under
dynamic
static
perspectives
based
on
Standardized
Precipitation
Evapotranspiration
Index
Terrestrial
Water
Storage
Anomalous
Drought
Index,
fine-tuned
scale
seasonal
scale,
explored
contributing
capacity
variable
interactions.
results
show
that:
(1)
perspective,
while
is
decreasing
annual
spring
season
shows
opposite
trend;
(2)
large
variability
exists
timing
at
spatial
scales,
with
elevation
playing
most
important
influential
role,
bivariate
interactions
stronger
explanations
compared
single
variables.
This
highlights
importance
considering
contributes
our
understanding
response
secondary
upper-level
droughts,
providing
valuable
insights
into
hydrologic
drought.
The
mid-lower
reaches
of
the
Yangtze
River
basin
(MLRYRB)
experience
continuous
daily
precipitation
during
flood
season
and
superposition
tends
to
exacerbate
localized
flooding
because
both
long
preceding
succeeding
(PSP),
as
well
extreme
(EP)
components.
This
study
focused
on
time
cross-section
in
which
an
EP
event
(EPE)
was
defined
involving
at
least
one
day
consecutive
precipitation.
We
analyzed
spatiotemporal
variation
characteristics
four
types
EPEs
(front,
late,
balanced,
single
day)
based
data
obtained
from
130
meteorological
stations.
Precipitation
amount
frequency
EPE
accounted
for
only
13%
21%,
respectively,
while
balanced)
that
are
associated
with
PSP
87%
79%,
confirming
connotation
EPE.
front
late
under
100-year
return
level
reached
250
mm
230
mm,
respectively.
In
addition
southeastern
coastal
region,
a
special
patch
central
part
MLRYRB
identified
hot
spot.
Global
warming
could
lead
significant
increases
low
latitudes
future,
particularly
southern
region.
concept
is
useful
exploring
disaster-causing
processes
EP,
it
provides
theoretical
basis
deriving
hazard
chain
estimation
disaster
effects.
