Hydrology Research,
Journal Year:
2022,
Volume and Issue:
54(1), P. 49 - 64
Published: Dec. 23, 2022
Abstract
Climate
change
and
anthropogenic
interventions
have
obviously
altered
the
eco-hydrological
regimes.
A
quantitative
evaluation
attribution
of
alterations
are
urgently
required.
In
this
study,
we
evaluated
various
attributions
regimes
in
Weihe
River
Basin
(WRB).
Firstly,
trends
change-point
analysis
hydrological
elements
were
examined,
natural
streamflow
was
reproduced
based
on
variable
infiltration
capacity
model.
Then,
most
ecologically
relevant
indicators
(ERHIs)
selected
combined
with
eco-deficit
eco-surplus
to
assess
degree
regime
alterations.
Finally,
relative
contributions
quantified
using
‘simulated–observed
comparison’
method.
The
results
showed
that
(1)
WRB
exhibited
significant
decreasing
(p
<
0.01),
a
point
0.01)
series
identified
1990.
(2)
Seven
representative
alteration
as
ERHIs.
(3)
During
human-induced
period
(1991–2017),
human
activities
dominant
factors
well
variations
ERHI
indexes
metrics.
Overall,
proposed
framework
may
improve
understanding
driving
forces
under
changing
environment.
Earth s Future,
Journal Year:
2022,
Volume and Issue:
10(3)
Published: March 1, 2022
Meteorological
to
hydrological
drought
propagation
has
been
widely
studied
reflect
the
relationship
between
these
categories
and
better
understand
mechanisms.
However,
global
warming
may
alter
features,
which
are
not
fully
understood.
This
study
aims
investigate
changes
in
meteorological
conditions,
especially
their
features
1.5–3.0°C
warmer
climates
for
8,655
watersheds
globally.
First,
three-month
scale
standardized
precipitation
index
runoff
calculated
based
on
simulated
by
15
climate
models
four
models,
respectively.
Drought
events
then
identified
using
run
theory,
followed
calculation
of
(i.e.,
pooling,
lag,
lengthening)
matched
droughts.
As
a
result,
both
conditions
duration
severity)
would
relieve
due
increased
regions
excluding
Western
North
America,
South
Mediterranean,
Southern
Africa,
East
Asia,
Australia.
be
more
severe
during
from
droughts
over
most
regions.
During
propagation,
worsening
half
serious
first
relieved
with
rising
temperature.
These
results
indicate
that
efforts
slow
down
can
suppress
deterioration
propagation.
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: March 12, 2024
Abstract
This
study
aims
to
quantify
meteorological–hydrological
drought
propagations
and
examine
the
potential
impacts
by
climatic
variability,
LULC
change
(LULC),
human
regulations.
An
integrated
observation-modeling
framework
quantifies
propagation
intervals
assesses
mechanisms
influencing
hydrological
droughts.
Meteorological
droughts
are
characterized
using
Standardized
Precipitation
Evapotranspiration
Index
(SPEI),
assessed
through
Streamflow
(SSI)
across
diverse
zones.
Cross-correlation
analysis
between
SPEI
SSI
time
series
identifies
lag
associated
with
highest
correlation
as
interval.
Mechanisms
investigated
via
a
coupled
empirical-process
modeling
incorporating
Soil
Water
Assessment
Tool
(SWAT).
Discrepancies
simulated
observed
help
extent
of
regulation
on
characteristics
propagation.
The
Yellow
River
Basin
(YRB),
divided
into
six
subzones
based
climate
characteristics,
is
selected
case
study.
Key
findings
include:
(1)
were
extremely
severe
most
YRB
during
1990s,
while
2000s
showed
some
mitigation
primarily
due
precipitation
increases.
(2)
Hydrological
times
from
meteorology
hydrology
demonstrated
substantial
spatiotemporal
variability.
In
general,
summer
shorter
than
other
seasons.
(3)
Propagation
in
arid
regions
cropland
or
built-up
land
cover
versus
grassland
woodland,
reverse
held
for
humid
regions.
(4)
Human
regulations
prolonged
times,
likely
reservoir
designed
overcome
water
deficits.
While
focus
this
paper,
methodologies
applicable
worldwide
enhance
forecasting
resource
management.
various
contexts
worldwide.
Journal of Hydrology Regional Studies,
Journal Year:
2024,
Volume and Issue:
51, P. 101654 - 101654
Published: Jan. 10, 2024
The
Yiluo
River
Basin
(YLRB),
China
Understanding
the
alterations
in
drought
propagation
under
evolving
environmental
conditions
is
crucial
for
efficient
management
of
water
resources.
In
this
study,
'simulation-observation'
comparison
method
was
employed
to
analyze
distinct
periods:
baseline,
simulated,
and
disturbed
periods.
This
facilitated
quantification
impact
climate
change
human
activities
on
characteristics,
such
as
response
time
Standardized
Streamflow
Index
(SSI)
Precipitation
(SPI)
threshold.
times
SSI
SPI
has
been
prolonged
at
monthly
seasonal
scales
due
change,
while
it
reduced
annual
scale.
lengthening
only
evident
longer
temporal
scales.
Human
have
contributed
higher
thresholds
severe
extreme
droughts
scales,
increasing
probability
droughts.
Meanwhile,
partially
offset
negative
impacts
activities.
However,
scale,
main
cause
thresholds.
conclusions
drawn
from
research
provide
valuable
insights
development
policies
aimed
managing
a
changing
environment.
Water Resources Research,
Journal Year:
2024,
Volume and Issue:
60(7)
Published: July 1, 2024
Abstract
GRACE
(Gravity
Recovery
and
Climate
Experiment)
has
been
widely
used
to
evaluate
terrestrial
water
storage
(TWS)
groundwater
(GWS).
However,
the
coarse‐resolution
of
data
limited
ability
identify
local
vulnerabilities
in
changes
associated
with
climatic
anthropogenic
stressors.
This
study
employs
high‐resolution
(1
km
2
)
generated
through
machine
learning
(ML)
based
statistical
downscaling
illuminate
TWS
GWS
dynamics
across
twenty
sub‐regions
Indus
Basin.
Monthly
anomalies
obtained
from
a
geographically
weighted
random
forest
(RF
gw
model
maintained
good
consistency
original
at
25
grid
scale.
The
downscaled
1
resolution
illustrate
spatial
heterogeneity
depletion
within
each
sub‐region.
Comparison
in‐situ
2,200
monitoring
wells
shows
that
significantly
improves
agreement
data,
evidenced
by
higher
Kling‐Gupta
Efficiency
(0.50–0.85)
correlation
coefficients
(0.60–0.95).
Hotspots
highest
decline
rate
between
2002
2023
were
Dehli
Doab
(−442,
−585
mm/year),
BIST
(−367,
−556
Rajasthan
(−242,
−381
BARI
(−188,
−333
mm/year).
Based
on
general
additive
model,
47%–83%
was
stressors
mainly
due
increasing
trends
crop
sown
area,
consumption,
human
settlements.
lower
(i.e.,
−25
−75
mm/year)
upstream
(e.g.,
Yogo,
Gilgit,
Khurmong,
Kabul)
where
factors
(downward
shortwave
radiations,
air
temperature,
sea
surface
temperature)
explained
72%–91%
TWS/GWS
changes.
relative
influences
varied
sub‐regions,
underscoring
complex
interplay
natural‐human
activities
basin.
These
findings
inform
place‐based
resource
management
Basin
advancing
understanding
vulnerabilities.