Deep learning-driven regional drought assessment: an optimized perspective
Chandrakant M. Kadam,
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Udhav V. Bhosle,
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Raghunath S. Holambe
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et al.
Earth Science Informatics,
Journal Year:
2024,
Volume and Issue:
17(2), P. 1523 - 1537
Published: Feb. 13, 2024
Language: Английский
Integrating Climate Indices and Land Use Practices for Comprehensive Drought Monitoring in Syria: Impacts and Implications
Environmental and Sustainability Indicators,
Journal Year:
2025,
Volume and Issue:
unknown, P. 100631 - 100631
Published: Feb. 1, 2025
Language: Английский
Evaluating the standardized and threshold based drought indices for historical drought detection in the Great Ruaha River Basin, Tanzania
Natural Hazards,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 12, 2025
Language: Английский
Spring Meteorological Drought over East Asia and Its Associations with Large-Scale Climate Variations
Water,
Journal Year:
2024,
Volume and Issue:
16(11), P. 1508 - 1508
Published: May 24, 2024
East
Asia
is
a
region
that
highly
vulnerable
to
drought
disasters
during
the
spring
season,
as
this
period
critical
for
planting,
germinating,
and
growing
staple
crops
such
wheat,
maize,
rice.
The
climate
in
significantly
influenced
by
three
large-scale
variations:
Pacific
Decadal
Oscillation
(PDO),
El
Niño–Southern
(ENSO),
Indian
Ocean
Dipole
(IOD)
Oceans.
In
study,
meteorological
was
quantified
using
standardized
precipitation
evapotranspiration
index
(SPEI)
March,
April,
May.
Initially,
coupled
networks
were
established
two
variables:
sea
surface
temperature
(SST)
SPEI.
directed
links
from
SST
SPEI
determined
based
on
Granger
causality
test.
These
revealed
associations
between
variations
droughts,
indicating
semi-arid
areas
are
more
sensitive
these
variations.
spring,
PDO
ENSO
do
not
cause
extreme
wetness
or
dryness
Asia,
whereas
IOD
does.
remote
impacts
of
can
be
partially
explained
atmospheric
circulations,
where
combined
effects
air
temperatures,
winds,
pressure
fields
determine
wet/dry
conditions
Asia.
Language: Английский
Bivariate and Partial Wavelet Coherence for Revealing the Remote Impacts of Large-Scale Ocean-Atmosphere Oscillations on Drought Variations in Xinjiang, China
Water,
Journal Year:
2025,
Volume and Issue:
17(7), P. 957 - 957
Published: March 25, 2025
Xinjiang,
an
arid
area
located
in
the
central
part
of
Eurasian
continent
with
high
evaporation
and
low
precipitation,
experiences
frequent
droughts.
This
study
builds
on
previous
research
by
incorporating
five
key
ocean-atmosphere
oscillations
using
one-month
SPEI
as
a
meteorological
drought
indicator.
Monthly
time
series
precipitation
temperature
from
53
stations
are
utilized
to
calculate
monthly
series,
seasonal
Kendall
test
analyzes
trends.
Despite
increased
conditions
Xinjiang
worsened
due
temperatures,
especially
south,
during
1961–2017.
The
clustered
agglomerative
hierarchical
method,
basically
reflecting
Xinjiang’s
topographical
climatic
diversity.
However,
classical
correlation
methods
show
weak
or
negligible
overall
between
large-scale
oscillators.
Therefore,
partial
wavelet
coherence
(PWC)
method
was
used
detect
scale-specific
correlations.
Both
bivariate
(BWC)
PWC
detected
significant
correlations
oscillators
at
some
specific
scales.
Our
analyses
indicate
that
southern
droughts
more
influenced
Pacific
Indian
Ocean
oscillators,
while
northern
affected
Atlantic
Arctic
climate
variations.
Language: Английский
Temporal and spatial characteristics of ecological drought in the Inland River Basin and its driving factors
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Nov. 21, 2024
Most
of
the
previous
studies
only
used
index
vegetation
growth
to
characterize
ecological
drought.
This
study
built
a
Standardized
Ecological
Water
Deficit
Index
(SEWDI)
,
analysed
its
space–time
evolution
characteristics
from
perspectives
time,
space
and
spatio-temporal
coupling,
extractes
feature
variables
by
three-dimensional
clustering,
typical
drought
events,
effect
teleconnection
factors
on
was
investigated
using
cross
wavelet
analysis
.
The
reliability
SEWDI
quantitatively
evaluated
comparing
r
values
Precipitation
(SPI),
Evapotranspiration
(SPEI),
Soil
Moisture
(SSMI),
self-calibrating
Palmer
Drought
Severity
(scPDSI),
with
Solar-induced
Fluorescence
(SSIF)
at
various
scales
in
time.The
results
demonstrated
that:
(1)
Inland
River
Basin
showed
weakening
trend
1982
2015.
Seasonal
wetting
west
east,
is
most
evident
spring.
It
may
be
related
policy
returning
farmland
forest
eastern
part
IRB
Inner
Mongolia
Autonomous
Region.
(2)
Three-dimensional
recognition
method
could
extract
more
detailed
characteristic
events.
A
total
133
events
occurred
during
1982–2015,
had
longer
duration
intensity
after
twenty-first
century.
(3)
June
2005
February
2007
severe
event
record,
which
lasted
for
21
months.
44.65
×
105
month·km2,
area
23.79
104km2.
2005,
intensified
September
attenuated
2006,
re-intensified
August
2006
re-attenuated
(extinction)
2007.
migration
spread
northeast
(4)
Among
teleconnecting
factors,
ENSO
has
complex
greatest
influence
Basin.
(5)
In
addition
having
high
correlation
other
indexs,
can
also
accurately
reflect
effects
vegetation.
When
occur,
precipitation
decreases
significantly.
However,
soil
moisture
ignored
this
study,
aims
provide
ideas
calculating
small
watershed.
How
calculate
water
deficiency
different
regions
focus
future
work.
Language: Английский
Temporal and spatial characteristics of ecological drought in the Inland River Basin and its driving factors
Research Square (Research Square),
Journal Year:
2024,
Volume and Issue:
unknown
Published: May 3, 2024
Abstract
Most
of
the
previous
studies
only
used
index
vegetation
growth
to
characterize
ecological
drought.
This
study
built
a
Standardized
Ecological
Water
Deficit
Index
(SEWDI),
analysed
its
space-time
evolution
characteristics
from
perspectives
time,
space
and
spatio-temporal
coupling,
extractes
feature
variables
by
three-dimensional
clustering,
typical
drought
events,
effect
teleconnection
factors
on
was
investigated
using
cross
wavelet
analysis.
The
reliability
SEWDI
quantitatively
evaluated
comparing
r
values
Precipitation
(SPI),
Evapotranspiration
(SPEI),
Soil
Moisture
Index(SSMI),
self-calibrating
Palmer
Drought
Severity
(scPDSI),
with
Solar-induced
Fluorescence
(SSIF)
at
various
scales
in
time.The
results
demonstrated
that:
(1)
Inland
River
Basin
showed
weakening
trend
1982
2015.
Seasonal
wetting
west
east,
is
most
evident
spring.
(2)
Three-dimensional
recognition
method
could
extract
more
detailed
characteristic
events.
A
total
133
events
occurred
during
1982–2015,
had
longer
duration
intensity
after
21st
century.
(3)
June
2005
February
2007
severe
event
record,
which
lasted
for
21
months.
44.65×10
5month·km
2,
area
23.79×10
4km
2.
2005,
intensified
September
attenuated
2006,
re-intensified
August
2006
re-attenuated
(extinction)
2007.
migration
spread
northeast
(4)
Among
teleconnecting
factors,
ENSO
has
complex
greatest
influence
Basin.
(5)
In
addition
having
high
correlation
other
indexs,
can
also
accurately
reflect
effects
vegetation.
Language: Английский
Drought Characteristics during Spring Sowing along the Great Wall Based on the MCI
Guofang Wang,
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Juanling Wang,
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Wei Sun
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et al.
Agronomy,
Journal Year:
2024,
Volume and Issue:
14(10), P. 2195 - 2195
Published: Sept. 24, 2024
The
region
along
the
Great
Wall
is
a
typical
dryland
agricultural
zone,
serving
as
both
potential
area
for
staple
grain
production
and
key
specialty
crops
like
coarse
grains
cool-climate
vegetables.
Studying
characteristics
of
drought
during
spring
sowing
period
crucial
developing
diversified
planting
strategies
ensuring
food
security.
This
study
analyzes
conditions
from
1960
to
2023,
revealing
spatial
temporal
distribution
in
quantifying
impact
climate
change
on
frequency
intensity.
By
doing
so,
it
fills
gap
existing
research,
which
often
lacks
long-term,
multi-dimensional
analysis
characteristics.
Using
daily
meteorological
data
April
20
May
between
employs
Meteorological
Composite
Drought
Index
(MCI)
quantitatively
identify
examine
evolution
region.
results
show
that,
scale,
mild
moderate
droughts
60.45%
25.19%,
respectively,
with
no
occurrences
severe
or
extreme
drought.
On
an
annual
intensity
ratio
affected
stations
increasing
trend,
decrease
increase
occurrences.
Additionally,
follows
pattern
“higher
east
than
west”
north
south”.
also
finds
that
migration
centers
shows
clear
evolution,
center
shifting
southwestward
1960s
2000s,
then
moving
northeastward
2000s
2023.
These
findings
provide
critical
support
optimizing
resistance
offer
new
insights
future
research
relationship
change.
It
suggested
practices
water
resource
management
policies
should
be
adjusted
according
centers,
particular
focus
mitigation
measures
period.
Language: Английский
Investigating Effective Reconnaissance Drought Index Ability to Reproduce Drought Signature over the Massili Basin (Burkina Faso)
Tog-Noma Patricia Emma Bontogho,
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Michelline Marie Regina Kansole,
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Mercy A. Abarike
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et al.
Journal of Water Resources and Ocean Science,
Journal Year:
2024,
Volume and Issue:
13(5), P. 116 - 123
Published: Nov. 12, 2024
Drought
is
a
significant
natural
hazard
particularly
in
arid
and
semi-arid
regions
where
water
resources
management
already
challenging.
Burkina
Faso,
landlocked
country
located
the
Sahel
region,
highly
vulnerable
to
drought
due
its
climate.
The
has
experienced
recurrent
droughts
since
1970s,
with
impacts
on
population
economy.
To
develop
effective
mitigation
strategies,
comprehensive
understanding
of
characteristics
required.
This
study
investigates
historical
long-term
trends
Massili
basin
central
Faso.
For
this
purpose,
features
been
analyzed
based
Effective
Reconnaissance
Index
(eRDI)
at
various
months
accumulation.
calculate
for
Basin,
monthly
precipitation
(Prct),
minimum
temperature
(Tmin),
maximum
(Tmax)
data
spanning
from
1960
2021
were
obtained
National
Meteorological
Agency
Potential
evapotranspiration
(ETP)
was
estimated
using
Hargreaves
method.
Our
findings
indicate
that
under
eRDI-3,
1964
(1.86),
2020
(1.53),
(0.63)
are
wettest
years,
while
1963
(-0.65)
1998
(-0.76)
driest.
Under
eRDI-12,
portion
values
falls
within
range
-0.14
0.03.
In
case
eRDI-24,
substantial
number
cluster
between
-0.08
0.08.
distribution
highlights
near-normal
conditions
(-0.99
0.99)
as
most
frequent
occurrence
watershed.
desertification
area
topic
discussion
decades.
However,
these
reinforce
prevailing
belief
partial
re-greening
region.
Language: Английский