Remote Sensing,
Journal Year:
2023,
Volume and Issue:
15(9), P. 2247 - 2247
Published: April 24, 2023
Monitoring
and
managing
groundwater
resources
is
critical
for
sustaining
livelihoods
supporting
various
human
activities,
including
irrigation
drinking
water
supply.
The
most
common
method
of
monitoring
well
level
measurements.
These
records
can
be
difficult
to
collect
maintain,
especially
in
countries
with
limited
infrastructure
resources.
However,
long-term
data
collection
required
characterize
evaluate
trends.
To
address
these
challenges,
we
propose
a
framework
that
uses
from
the
Gravity
Recovery
Climate
Experiment
(GRACE)
mission
downscaling
models
generate
higher-resolution
(1
km)
predictions.
designed
flexible,
allowing
users
implement
any
machine
learning
model
interest.
We
selected
four
models:
deep
model,
gradient
tree
boosting,
multi-layer
perceptron,
k-nearest
neighbors
regressor.
effectiveness
framework,
offer
case
study
Sunflower
County,
Mississippi,
using
validate
Overall,
this
paper
provides
valuable
contribution
field
resource
management
by
demonstrating
remote
sensing
techniques
improve
resource,
those
who
seek
faster
way
begin
use
datasets
applications.
Discover Water,
Journal Year:
2024,
Volume and Issue:
4(1)
Published: July 24, 2024
Abstract
Groundwater
remains
the
most
dependable
resource
for
various
essential
uses
such
as
drinking,
cleansing,
agricultural
irrigation,
and
industrial
applications.
In
urban
areas,
dependency
on
groundwater
to
meet
water
demands
is
significant.
However,
this
faces
threats
from
overuse
poor
management,
leading
a
degradation
in
quality
primarily
due
unchecked
release
of
household
wastes.
The
escalation
activities
rapid
growth
have
amplified
volume
wastewater,
adversely
affecting
purity
freshwater
sources
within
aquifers.
This
investigation
focuses
evaluating
impact
effluents
city
Faisalabad.
main
contributors
pollution
include
indiscriminate
disposal
through
unlined
drains
extensive
application
chemical
agents
agriculture,
fertilizers,
pesticides.
To
understand
physiochemical
properties
both,
drain
groundwater,
samples
were
collected
at
distances
50
m,
100
150
m
outlets.
study
utilized
Geographic
Information
Systems
(GIS)
accurately
map
analyze
distribution
contaminants.
Parameters
pH,
electrical
conductivity
(EC),
total
dissolved
solids
(TDS),
hardness,
bicarbonates,
calcium
magnesium
chloride
levels
examined.
findings
indicated
that
contaminant
highest
increased
concentration
closer
they
drainage
sources,
with
exception
pH
levels.
All
exceeded
World
Health
Organization's
(WHO)
safe
limits,
deeming
them
unfit
use.
finding
indicates
widespread
contamination,
posing
significant
public
health
risks
highlighting
urgent
need
improved
waste
management
treatment
practices
It
underscores
critical
importance
implementing
effective
control
measures
safeguard
ensure
security
region.
notable
correlation
was
observed
between
pollutants
key
indicators
EC,
TDS,
their
role
deteriorating
aquifer
quality.
Moreover,
exhibited
pollutant
concentrations
compared
those
taken
further
away,
distances.
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: March 9, 2024
Monitoring
and
predicting
the
regional
groundwater
storage
(GWS)
fluctuation
is
an
essential
support
for
effectively
managing
water
resources.
Therefore,
taking
Shandong
Province
as
example,
data
from
Gravity
Recovery
Climate
Experiment
(GRACE)
GRACE
Follow-On
(GRACE-FO)
used
to
invert
GWS
January
2003
December
2022
together
with
Watergap
Global
Hydrological
Model
(WGHM),
in-situ
volume
level
data.
The
spatio-temporal
characteristics
are
decomposed
using
Independent
Components
Analysis
(ICA),
impact
factors,
such
precipitation
human
activities,
which
also
analyzed.
To
predict
short-time
changes
of
GWS,
Support
Vector
Machines
(SVM)
adopted
three
commonly
methods
Long
Short-Term
Memory
(LSTM),
Singular
Spectrum
(SSA),
Auto-Regressive
Moving
Average
(ARMA),
comparison.
results
show
that:
(1)
loss
intensity
western
significantly
greater
than
those
in
coastal
areas.
From
2006,
increased
sharply;
during
2007
2014,
there
exists
a
rate
-
5.80
±
2.28
mm/a
GWS;
linear
trend
change
5.39
3.65
2015
2022,
may
be
mainly
due
effect
South-to-North
Water
Diversion
Project.
correlation
coefficient
between
WGHM
0.67,
consistent
level.
(2)
has
higher
positive
monthly
Precipitation
Climatology
Project
(GPCP)
considering
time
delay
after
moving
average,
similar
energy
spectrum
depending
on
Continuous
Wavelet
Transform
(CWT)
method.
In
addition,
influencing
facotrs
annual
analyzed,
including
consumption
mining,
farmland
irrigation
0.80,
0.71,
respectively.
(3)
For
prediction,
SVM
method
analyze,
training
samples
180,
204
228
months
established
goodness-of-fit
all
0.97.
coefficients
0.56,
0.75,
0.68;
RMSE
5.26,
4.42,
5.65
mm;
NSE
0.28,
0.43,
0.36,
performance
model
better
other
short-term
prediction.
IEEE Transactions on Geoscience and Remote Sensing,
Journal Year:
2023,
Volume and Issue:
61, P. 1 - 12
Published: Jan. 1, 2023
Extreme
precipitation
events
have
caused
severe
societal,
economic
and
environmental
impacts
through
the
disasters
of
floods,
flash-floods
landslides.
However,
coarse-resolution
satellite-derived
data
makes
it
difficult
to
quantitatively
capture
certain
fine-scale
heavy
rainfall
process.
Therefore,
improve
spatial
resolution
accuracy
satellite-based
extremes,
a
downscaling-calibration
scheme
based
on
eXtreme
Gradient
Boosting
(XGBoost_DC)
was
proposed
in
this
study,
where
XGBoost
algorithm
applied
both
downscaling
calibration
procedures.
The
performance
XGBoost_DC
evaluated
with
other
two
comparative
methods,
which
only
used
either
(XGBoost_Spline)
or
(Spline_XGBoost)
results
showed
that:
(i)
achieved
best
performance,
as
obtained
highest
well
reproduced
occurrence
distribution
during
typhoon
events.
(ii)
could
variations
precipitation.
Although
Spline_XGBoost
slightly
worse
than
XGBoost_DC,
significantly
underestimated
variability.
(iii)
model
assessment
between
illustrated
essential
contribution
process,
improved
our
understanding
capability
machine
learning
reproducing
variance
These
findings
imply
that
can
be
for
generating
high-resolution
high-quality
extremes
events,
would
benefit
water
flood
management,
various
applications
hydrological
meteorological
modelling.
European Journal of Remote Sensing,
Journal Year:
2023,
Volume and Issue:
56(1)
Published: Sept. 5, 2023
The
main
objectives
of
this
study
are
(1)
to
compare
several
machine
learning
models
predict
county-level
corn
yield
in
the
area
and
(2)
feasibility
for
in-season
prediction.
We
acquired
remotely
sensed
vegetation
indices
data
from
moderate
resolution
imaging
spectroradiometer
using
Google
Earth
Engine
(GEE).
Vegetation
a
span
15
years
(2006–2020)
were
processed
downloaded
GEE
months
corresponding
crop
growth
(April–October).
compared
nine
yield.
Furthermore,
we
analyzed
prediction
performance
top
three
models.
results
show
that
partial
least
square
regression
(PLSR)
outperformed
other
by
achieving
highest
training
testing
performance.
area's
PLSR,
support
vector
(SVR)
ridge
regression.
For
prediction,
SVR
model
performed
comparatively
well
R2
=
0.875.
can
both
(best
0.875)
end-of-season
0.861)
with
satisfactory
indicate
remote
sensing
be
used
before
harvest
decent
This
provide
useful
insights
terms
food
security
early
decision
making
related
climate
change
impacts
on
security.