American Journal of Remote Sensing,
Год журнала:
2024,
Номер
12(2), С. 53 - 70
Опубликована: Дек. 31, 2024
Drought
is
one
of
the
most
frequent
natural
disasters
in
world,
droughts
has
a
significantly
negative
impact
on
social,
economic,
and
environmental
situations.
The
goal
to
assess
define
spatiotemporal
analysis
meteorological
across
ENSO
(neutral,
El
Niño
La
Niña)
events
provided
guidance
study
area.
CHIRPS
data
gathered
from
CHG-UCSB
for
spatial
USGS
FEWS
NET
temporal
analysis,
respectively,
time
periods
1981
2020
1991–2020.
For
SPI
was
selected
due
better
rainfall
input
over
area,
we
employed
Python
tools
GeoCLIM
methodologies.
findings
this
demonstrate
that
Borana
zone
experienced
an
increase
during
Niño,
Niña,
neutral
between
2020.
frequency
duration
dryness
were
displayed
steps
short-term
drought
indices.
extent,
duration,
(deficit
precipitation)
varied,
as
shown
by
time-scale
indices
range
three
twelve
months.
remaining
woredas
investigation
SPI3
SPI6,
SPI6
SPI12,
SPI9
SPI12
indices,
correlation
values
short
long
durations
area
dominant
factor
severity
correlation.
It
also
necessary
conduct
additional
research
how
spread,
including
use
various
gauge
frequency,
length,
intensity
at
woreda,
regional,
national
levels.
This
will
help
different
sectors,
knowledge’s
references
manage
irrigation,
crop
variety
selection
(drought
tolerant
seeds),
soil
conservation,
production,
awareness
Journal of Water and Climate Change,
Год журнала:
2024,
Номер
15(7), С. 3033 - 3055
Опубликована: Апрель 26, 2024
ABSTRACT
Land
surface
temperature
(LST)
increase
and
urban
heat
islands
(UHI)
are
significant
issues
in
development.
Urban
green
spaces
crucial
combating
micro-climate
change.
This
study
assesses
their
effects
on
cooling
mitigating
change
Addis
Ababa
using
remotely
sensed
data
from
Landsat
5
TM
(1990),
7
ETM+
(2005),
8
OLI/TIRS
(2021).
LST
was
retrieved
mono-window
algorithms
for
7,
the
split-window
algorithm
8.
Regression
correlation
analyses
of
Normalized
Difference
Vegetation
Index
(NDVI)
were
conducted
SPSS
V23,
STATA,
R
Studio.
Results
showed
a
decrease
space
(UGS)
120.4
km²
1990
to
76.26
2021.
Multiple
linear
regression
analysis
indicated
that
built-up
areas
vegetation
accounted
92.2%
variations.
The
efficiency
(CE)
threshold
value
(TVoE)
calculated
as
4.5
±
0.5
hectares.
suggests
allocating
this
size
effectively
reduces
effects.
Strengthening
public
participation
greening
is
mitigate
change,
sustain
development,
improve
quality
life.
Built-up
significantly
impact
more
than
water
(NDWI),
essential
land-use
planning
minimize
urbanization
impacts.
Water,
Год журнала:
2024,
Номер
16(21), С. 3143 - 3143
Опубликована: Ноя. 3, 2024
Analyzing
agricultural
and
hydrological
drought
at
different
timescales
is
essential
for
designing
adaptation
strategies.
This
study
aimed
to
assess
in
the
Abbay
Basin
of
Ethiopia
by
using
multiple
indices,
namely
standardized
precipitation
index
(SPI),
evapotranspiration
(SPEI),
normalized
difference
vegetation
(NDVI),
condition
(VCI),
severity
(DSI).
Climate
extremes
were
assessed
over
between
1981
2022.
The
results
indicate
that
years
1982
2014
most
drought-prone,
while
year
1988
was
wettest
Basin.
revealed
presence
extremely
dry
severely
conditions,
potentially
impacting
output
region.
Agricultural
identified
during
main
crop
seasons
(June
September).
VCI
indicated
wet
conditions.
In
2012,
65%
area
affected
extreme
nearly
half
experienced
2013
DSI
occurrence
drought,
although
spatial
coverage
conditions
lower
than
other
indices.
2003,
78.49%
moderate
whereas
severe
20%
2010,
about
90%
drought.
provides
valuable
insights
communities,
enabling
them
mitigate
impact
on
yields
utilizing
An
adequate
knowledge
policymakers
potential
effects
socioeconomic
activities
recognize
significance
implementing
climate
change
measures.
Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi,
Год журнала:
2025,
Номер
28(1), С. 350 - 368
Опубликована: Март 3, 2025
Global
climate
change
leads
to
significant
alterations
in
systems,
affecting
natural
resource
management,
agriculture,
and
water
security.
As
these
impacts
are
also
felt
at
the
local
level,
regional
analyses
crucial.
This
study
analyzes
precipitation
data
from
Diyarbakır
province
between
1970
2022
examine
effects
of
change.
Trend
were
conducted
using
Mann-Kendall,
Sen's
Slope,
Spearman’s
Rho,
Innovative
Analysis
(ITA)
methods.
The
Mann-Kendall
test
assessed
statistical
significance
trends,
while
Slope
estimated
magnitude
trends.
results
indicated
no
statistically
trends
on
an
annual
or
seasonal
basis.
However,
ITA
method
revealed
decreasing
summer
totals,
alongside
increasing
spring
autumn
precipitation.
No
detected
for
winter
Rho
identified
a
positive
relationship
total
seasons,
but
observed
among
seasons
themselves.
highlights
importance
contributes
preparedness
future
changes.
Continuous
monitoring
plays
critical
role
making
informed
strategic
decisions,
particularly
management
agricultural
policies.
Research Square (Research Square),
Год журнала:
2025,
Номер
unknown
Опубликована: Май 6, 2025
Abstract
This
study
investigated
the
variability
and
trends
of
precipitation
(P),
air
temperature,
reference
evapotranspiration
(ET0)
in
Lake
Tana
sub-basin
Ethiopia
from
1980
to
2023,
assessing
their
implications
for
water
resources,
agriculture,
forestry
development.
The
sub-basin,
a
crucial
ecological
socio-economic
zone
within
Upper
Blue
Nile
Basin,
is
increasingly
vulnerable
climate
change
impacts.
Using
long-term
monthly
data
five
sources,
including
MSWX-Past,
MERRA-2,
ERA-5,
CRUTS4.06,
TerraClimate,
spatiotemporal
were
analyzed.
Penman-Monteith
(FAO56)
method
was
employed
estimate
ET0,
statistical
techniques,
trend
linear
regression,
CV,
standardized
anomaly,
used
assess
variability.
Results
indicate
significant
increasing
annual
Kiremt
(June-September)
rainfall,
while
Belg
(February-May)
Bega
(October-January)
seasons
showed
non-significant
decreasing
trends.
Air
temperatures
exhibited
significantly
trends,
with
highest
March.
ET0
values
higher
northern
part
during
season.
Rainfall
low
but
moderate
high
Bega,
indicating
unpredictability
drier
seasons.
also
examined
climatic
balance
which
seasonal
Increased
rainfall
rising
temperature
&
pose
challenges
sustainable
resource
management.
Enhanced
monitoring,
integrated
management,
climate-resilient
practices
are
mitigating
impacts
