Journal of Applied and Natural Science,
Journal Year:
2023,
Volume and Issue:
15(4), P. 1595 - 1607
Published: Dec. 20, 2023
Estimating
peak
discharge
in
the
catchment
poses
a
challenge
for
hydrologists
due
to
potential
overflow
risks.
The
present
study
examined
various
methods,
including
Synthetic
unit
hydrograph,
Melchior,
and
Rational,
determine
value
Lesti
River
Catchment
Area.
Accurate
hydrological
input
data
is
essential
effectively
estimating
mitigating
damage
or
failure.
Optimized
physical
parameters
using
geographic
information
systems
are
critical
generating
values,
emphasizing
their
importance
estimation
process.
mean
absolute
percentage
error
(MAPE)
average
(MAE)
were
used
accurate
method
discharge.
Analysis
results
showed
varied
values
across
different
it
found
that
MAPE
ranged
from
15.15%
7.48%
MAE
1.47%
0.63%,
respectively.
Nakayasu
synthetic
hydrograph
obtained
minimum
measure
compared
other
methods
by
0.63%
MAE.
Therefore,
performance
considered
was
closely
approximating
observed
relatively
area.
Sustainability,
Journal Year:
2023,
Volume and Issue:
15(19), P. 14343 - 14343
Published: Sept. 28, 2023
This
paper
assesses
the
sustainability
impacts
in
middle
and
lower
reaches
of
Yellow
River
China
after
Xiaolangdi
Dam
was
constructed.
Based
on
land
use
data
interpreted
from
Landsat
remote
sensing
images,
covering
time
period
2000
to
2020
at
5-year
intervals,
this
research
uses
a
dynamic
attitude
index
comprehensive
degree
reveal
type
change
study
area
analyze
relationship
between
social
economy.
The
results
show
that
urban
rural
construction
is
with
largest
annual
rate,
increase
most
obvious
2005
2010,
growing
by
nearly
900
km2.
six
types
changed
sharply
grassland
unused
showing
significant
change.
On
whole,
tends
be
stable.
analysis
indicates
has
developed
direction
settlement.
Population
GDP
are
main
driving
factors
affecting
constant
region,
which
population
growth
rapid
economic
development
leading
decline
area,
also
for
expansion
land.
provide
scientific
basis
sustainable
Basin.
Sustainability,
Journal Year:
2024,
Volume and Issue:
16(23), P. 10453 - 10453
Published: Nov. 28, 2024
Over
the
past
two
decades,
large-scale
ecological
restoration
in
Loess
Plateau
has
significantly
transformed
land
use
and
cover
(LULC)
Wuding
River
Basin
(WRB),
improving
governance
environmental
conditions.
This
study
examines
spatiotemporal
evolution
of
LULC
its
driving
factors
from
2000
to
2020,
employing
methods
such
as
dynamic
degree,
transfer
matrix,
migration
trajectory,
geographical
detector.
Results
show
that
(1)
grassland
dominates
basin’s
(78.16%),
with
decreases
cropland
desert
areas,
expansions
grassland,
forest,
urban
areas.
Water
bodies
minimal
fluctuations.
The
mean
annual
degree
types
(from
highest
lowest)
is
follows:
forest
>
water
grassland.
overall
fluctuated,
initially
decreasing
(0.85%–0.68%),
then
increasing
(0.68–0.89%),
followed
by
another
decline
(0.89–0.30%).
(2)
patterns
follow
a
northwest-to-southeast
gradient,
primary
transitions
secondary
urban,
bodies.
Spatial
mainly
shifts
westward
northward.
(3)
Under
single-factor
influence,
natural
factors,
especially
slope
(7.2–36.4%)
precipitation
(6.1–22.3%),
are
drivers
changes,
population
density
(7.9%)
GDP
(27.5%)
influencing
In
interaction
topography
climate
(40.5–66.1%)
primarily
drive
increases
cropland,
while
human
activities
(24.8–36.7%)
influence
area
expansion.
Desert
reduction
largely
driven
climatic
(40.3%).
between
shows
either
bi-factorial
or
nonlinear
enhancement
effect,
suggesting
their
combined
offers
stronger
explanatory
power
than
any
single
factor
alone.
highlights
significant
changes
WRB,
both
activities,
contributing
enhanced
sustainability.
Ecohydrology,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 5, 2024
ABSTRACT
Global
warming
has
led
to
an
increase
in
the
frequency
of
meteorological
drought
events,
posing
a
significant
threat
ecosystem
security,
particularly
arid
and
semi‐arid
regions.
Previous
studies
have
utilized
correlation
analyses
examine
relationship
between
vegetation
drought;
however,
knowledge
gap
remains
regarding
causal
process
two.
This
study
investigates
linkage
solar‐induced
chlorophyll
fluorescence
(SIF)
standardized
precipitation
evapotranspiration
index
(SPEI)
Yellow
River
Basin
(YRB)
from
2001
2019
explores
cumulative
lagged
effects
SIF
response
SPEI.
The
results
indicated
that
lag
varied
with
intensity
water
stress.
Vegetation
regions
exhibited
poor
tolerance
high
sensitivity,
time
SPEI
are
6.5
2
months,
respectively.
Forest,
compared
cropland
grassland,
demonstrated
greater
reduced
sensitivity.
For
forests,
were
8.7
7.4
Grassland
was
more
influenced
by
precipitation,
while
forests
affected
temperature.
By
analysing
SPEI,
this
focuses
on
drought,
which
will
strengthen
understanding
areas.
Journal of Applied and Natural Science,
Journal Year:
2023,
Volume and Issue:
15(4), P. 1595 - 1607
Published: Dec. 20, 2023
Estimating
peak
discharge
in
the
catchment
poses
a
challenge
for
hydrologists
due
to
potential
overflow
risks.
The
present
study
examined
various
methods,
including
Synthetic
unit
hydrograph,
Melchior,
and
Rational,
determine
value
Lesti
River
Catchment
Area.
Accurate
hydrological
input
data
is
essential
effectively
estimating
mitigating
damage
or
failure.
Optimized
physical
parameters
using
geographic
information
systems
are
critical
generating
values,
emphasizing
their
importance
estimation
process.
mean
absolute
percentage
error
(MAPE)
average
(MAE)
were
used
accurate
method
discharge.
Analysis
results
showed
varied
values
across
different
it
found
that
MAPE
ranged
from
15.15%
7.48%
MAE
1.47%
0.63%,
respectively.
Nakayasu
synthetic
hydrograph
obtained
minimum
measure
compared
other
methods
by
0.63%
MAE.
Therefore,
performance
considered
was
closely
approximating
observed
relatively
area.
