Authorea (Authorea),
Journal Year:
2023,
Volume and Issue:
unknown
Published: May 8, 2023
To
compensate
for
the
intrinsic
coarse
spatial
resolution
of
groundwater
storage
(GWS)
anomalies
(GWSA)
from
Gravity
Recovery
and
Climate
Experiment
(GRACE)
satellites
make
better
use
current
dense
in
situ
groundwater-level
data
some
regions,
a
new
statistical
downscaling
method
was
proposed
to
derive
high-resolution
GRACE
GWS
changes.
A
ground-based
scaling
factor
(SFGB)
downscale
changes
that
were
corrected
using
gridded
factors
estimated
through
forward
modeling.
The
applied
North
China
Plain
(NCP),
where
many
observation
wells
consistently
measured
specific
yield
are
available.
Importantly,
sensitivity
explored
considering
uncertainties
due
variable
and/or
number
wells.
Independent
validation
shows
SFGB
can
effectively
recover
GWSA
at
0.5º
grid
scale
(r
=
0.81,
root
mean
square
error
40.51
mm/yr).
SFGB-corrected
NCP
-32.60{plus
minus}0.99
mm/yr
(-4.6{plus
minus}0.14
km3/yr)
during
2004-2015,
showing
contrasting
trends
piedmont
west
(loss)
coastal
east
(gains).
Uncertainties
arising
yield,
groundwater-level,
both
be
reduced
by
90%,
65%,
84%,
respectively
relative
GWSA.
This
study
highlights
potential
value
jointly
improve
accuracy
GRACE-derived
smaller
scales.
improved
change
estimates
would
facilitate
management.
Geosciences,
Journal Year:
2025,
Volume and Issue:
15(3), P. 91 - 91
Published: March 3, 2025
Accurate
data
collection
and
time
series
creation
are
crucial
for
understanding
these
changes.
However,
many
areas
lack
reliable
due
to
geopolitical
issues
government
permissions.
Urgent
action
is
needed
sustainable
water
management.
This
study
uses
Gravity
Recovery
Climate
Experiment
(GRACE)
analyze
monthly
fluctuations
in
groundwater
storage
the
Missan
region
of
Iraq
from
January
2022
December
2023,
using
Goddard
Space
Flight
Center
(GSFC)
mascon,
Jet
Propulsion
Laboratory
Downscaled
(JPL_D),
Catchment
Land
Surface
Model
(CLSM).
revealed
variability
GWS
over
area
RS
integration
with
available
monitoring
wells.
To
investigate
variability,
GSFC,
JPL_D,
CLSM
observed
a
downward
trend
2022;
GSFC
exhibits
highest
negative
trend,
while
has
lowest
trend.
Then,
June
had
positive
Most
period
remote
sensing
that
matches
well
situ,
which
wells
1,
2,
4
trends
period.
In
conclusion,
results
improve
role
small-scale
unconfined
aquifers,
supports
decision-making
resource
The
findings
illustrated
match
between
derived
GRACE
data.
Leakage
is
important
in
groundwater
cycle
research
and
water
resource
management,
the
key
to
construct
spatial
distribution
of
aquitard.
Influenced
by
natural
anthropogenic
factors,
density
boreholes
restricts
accuracy
aquitard
structure.
This
paper
explores
K-Nearest
Neighbor
(KNN)
method
multi-layer
structure
hinterland
Songnen
Plain,
Northeast
China,
with
limited
boreholes,
compare
it
Inverse
Distance
Weight
(IDW)
Ordinary
Kriging
(OK)
methods
evaluate
leakage.
The
KNN
needs
first
identify
eigenvalue-k
each
layer,
which
used
enhance
trainset
obtain
testset
a
larger
amount
sample
data
enhanced,
make
prediction
3-dimensional
more
accurate
than
IDW
OK.
aquitrad
obtained
different
from
OK,
thickness
difference
3.53%-54.00%,
area
2.28%-23.91%,
leakage
can
be
up
24.51%.
also
has
high
degree
identification
edges,
help
prevention
pollution.
results
provide
guidance
for
balance
analysis,
borehole
engineering
design,
resources
management
exploitation.
Air Soil and Water Research,
Journal Year:
2024,
Volume and Issue:
17
Published: Jan. 1, 2024
Over
exploitation
of
Ground
Water
(GW)
has
resulted
in
lowering
water
table
the
Jedeb
watershed.
In
this
study,
storage
changes
with
GRACE
satellite
data
and
total
annual
precipitation
CHIRPS
Google
Earth
Engine
system
were
investigated
for
watershed
during
2003–2017.
The
groundwater
recharge
is
estimated
from
a
time
series
using
fluctuation
method.
According
to
results
obtained
on
fluctuations
between
2003
2017,
it
was
found
that
biggest
increase
levels
(15
cm)
occurred
2008,
2013,
2015,
decrease
(12.5
2012.
net
rate
varied
18
25
cm/year
14-year
period,
average
21
cm/year.
This
study
indicates
GRACE-based
estimation
skilled
enough
provide
monthly
updates
trend
resource
managers
policymakers
Water,
Journal Year:
2024,
Volume and Issue:
16(18), P. 2609 - 2609
Published: Sept. 14, 2024
The
accessibility
and
deployment
of
complex
hydrological
models
remain
significant
challenges
in
water
resource
management
research.
This
study
presents
a
comprehensive
workflow
for
converting
Python-based
into
web
APIs,
addressing
the
need
more
accessible
interoperable
modeling
tools.
leverages
modern
technologies
containerization
to
streamline
process.
was
applied
three
distinct
models:
GRACE
downscaling
model,
synthetic
time
series
generator,
MODFLOW
groundwater
model.
implementation
process
each
model
completed
approximately
15
min
with
reliable
internet
connection,
demonstrating
efficiency
approach.
resulting
APIs
provide
standardized
interfaces
execution,
progress
tracking,
result
retrieval,
facilitating
integration
various
applications.
significantly
reduces
barriers
usage,
potentially
broadening
user
base
sophisticated
approach
aligns
contemporary
software
development
practices,
opening
new
avenues
collaboration
innovation.
While
such
as
performance
scaling
security
considerations
remain,
this
work
provides
blueprint
making
operational,
paving
way
enhanced
research
practical
applications
hydrology.
Hydrology,
Journal Year:
2024,
Volume and Issue:
11(11), P. 186 - 186
Published: Nov. 1, 2024
In
situ
groundwater
monitoring
is
critical
for
irrigated
agroecosystems
and
informs
land
cover
changes.
Yet,
such
data
can
pose
management
challenges
confound
agroecological
relationships.
Correspondingly,
satellite-based
approaches,
including
the
GRACE-constellation,
are
increasing.
Although
in
GRACE-derived
comparisons
occur,
limited
research
considers
dependencies.
Herein,
we
examined
differences
approaches
(observed
[in
situ,
O]
vs.
predicted
[GRACE-derived,
P])
within
Yazoo–Mississippi
Delta
(YMD),
an
agroecosystem
southeastern
USA.
We
compared
variations
modeled
hydrology,
cover,
irrigation
dynamics
of
YMD
upper-quartile
(UQ)
area
interest
(AOI)
(highest
levels)
lower-quartile
(LQ)
AOI
(lowest
every
year
from
2008
to
2020.
Spatially,
OUQ
PUQ
were
northern
portions
YMD,
with
OLQ
PLQ
southern
portions.
Groundwater
levels
between
OUQ:PUQ
OLQ:PLQ
each
had
correlations
>
0.85.
Regarding
most
categories
varied
±2.50%
model
estimates
over
time.
Relatedly,
documented
14
instances
where
use
category
level
inverted
across
models
(OLQ:PLQ
(5),
OUQ:OLQ
(6),
PUQ:PLQ
(3)).
Irrigation
results
not
statistically
different
among
all
models.
Overall,
our
highlight
importance
quantifying
incongruences
management.