Water Resources Research,
Journal Year:
2020,
Volume and Issue:
56(7)
Published: May 21, 2020
Abstract
The
emergence
of
state‐of‐the‐art
satellite
altimetry
has
provided
new
prospects
for
integrating
water
surface
elevation
(water
level)
measurements
with
a
hydrologic
model
river
discharge
estimation,
which
is
particularly
suited
poorly
gauged
or
ungauged
basins.
In
this
context,
we
explored
the
possibility
calibration
using
Jason‐2‐derived
levels,
followed
by
SWOT
(the
Surface
Water
and
Ocean
Topography
mission)‐like
data
combination
Landsat
5/8‐derived
at‐a‐section
widths
concurrent
levels).
Two
types
empirical
formulas
designed
specifically
altimetry‐derived
levels
joint
use
widths,
respectively,
were
used
to
derive
discharge,
was
integrated
(CREST‐RS).
Here
present
results
estimating
daily
continuous
in
narrow
rivers
upper
Brahmaputra
River
(UBR)
Lhasa
(LR)
developed
approach
independent
situ
measurements.
Five
scenarios
performed:
(1)
SWOT‐like
UBR
(scenarios
I–III)
(2)
LR
IV–V).
Results
showed
that
could
provide
reasonably
well‐constrained
parameters
Nash‐Sutcliffe
Efficiency
coefficient
(
NSE
)
reaching
0.85
during
2003–2014.
For
data,
reached
0.75
LR.
This
study
highlights
potential
performing
observations,
paves
way
estimate
basins
globally.
Water Resources Research,
Journal Year:
2020,
Volume and Issue:
56(4)
Published: March 20, 2020
Abstract
Launched
in
May
2018,
the
Gravity
Recovery
and
Climate
Experiment
Follow‐On
mission
(GRACE‐FO)—the
successor
of
erstwhile
GRACE
mission—monitors
changes
total
water
storage,
which
is
a
critical
state
variable
regional
global
hydrologic
cycles.
However,
gap
between
data
two
missions
breaking
continuity
observations
limiting
its
further
application.
In
this
study,
we
used
three
learning‐based
models,
that
is,
deep
neural
network,
multiple
linear
regression
(MLR),
seasonal
autoregressive
integrated
moving
average
with
exogenous
variables,
six
solutions
(i.e.,
Jet
Propulsion
Laboratory
spherical
harmonics
(JPL‐SH),
Center
for
Space
Research
SH
(CSR‐SH),
GeoforschungsZentrum
Potsdam
(GFZ‐SH),
JPL
mass
concentration
blocks
(mascons)
(JPL‐M),
CSR
mascons
(CSR‐M),
Goddard
Flight
(GSFC‐M))
to
reconstruct
missing
monthly
at
grid
cell
scale.
Evaluation
showed
models
were
reliable
reconstruction
areas
humid
no/low
human
interventions.
The
network
slightly
outperformed
variables
significantly
most
60
basins
studied.
mascon
sets
performed
better
than
basin
similar
performance,
but
varied
markedly
some
basins.
Results
study
are
expected
provide
reference
bridging
gaps
GRACE‐FO
satellites
selecting
suitable
studies.
Hydrology and earth system sciences,
Journal Year:
2025,
Volume and Issue:
29(2), P. 485 - 506
Published: Jan. 23, 2025
Abstract.
Water
vapour
flux,
expressed
as
evapotranspiration
(ET),
is
critical
for
understanding
the
earth
climate
system
and
complex
heat–water
exchange
mechanisms
between
land
surface
atmosphere
in
high-altitude
Tibetan
Plateau
(TP)
region.
However,
performance
of
ET
products
over
TP
has
not
been
adequately
assessed,
there
still
considerable
uncertainty
magnitude
spatial
variability
water
released
from
into
atmosphere.
In
this
study,
we
evaluated
22
against
situ
observations
basin-scale
balance
estimations.
This
study
also
spatiotemporal
total
flux
its
components
to
clarify
TP.
The
results
showed
that
remote
sensing
high-resolution
global
data
ETMonitor
PMLV2
had
a
high
accuracy,
with
overall
better
accuracy
than
other
regional
fine
resolution
(∼
1
km),
when
comparing
observations.
When
compared
estimates
at
basin
scale,
finer
GLEAM
TerraClimate
coarse
good
agreement.
Different
different
patterns
variability,
large
differences
central
western
multi-year
multi-product
mean
was
333.1
mm
yr−1,
standard
deviation
38.3
yr−1.
(i.e.
plant
transpiration,
soil
evaporation,
canopy
rainfall
interception
open-water
snow/ice
sublimation)
available
some
were
compared,
contribution
these
varied
considerably,
even
cases
where
similar.
Soil
evaporation
accounts
most
TP,
followed
by
transpiration
while
contributions
sublimation
cannot
be
negligible.
