Geophysical Research Letters,
Journal Year:
2024,
Volume and Issue:
51(10)
Published: May 13, 2024
Abstract
Recent
droughts
have
severely
threatened
water
security
in
many
regions
worldwide.
Reservoirs,
designed
to
combat
and
secure
supply
partially,
are
reported
failing
fill
up
the
total
capacity
due
severe
droughts.
How
bad
is
climate
affecting
reservoir
filling
on
a
global
scale?
This
issue
has
not
been
studied.
We
present
big
picture
of
reservoirs
crisis
using
satellite
altimetry.
Thanks
unique
characteristics
CryoSat‐2,
525
worldwide
were
investigated
during
2010–2022.
Results
show
that
most
(93%)
found
fully
filled
at
least
once.
About
21%
reservoirs,
which
mainly
located
Southern
Hemisphere,
significant
decline
levels.
Moreover,
about
20%
with
larger
level
fluctuations
(>3
m)
less
developed
economies,
indicating
informed
operation
rules
needed.
Further
analyses
indicate
largely
affected
by
extreme
events,
such
as
ENSO.
Water Resources Research,
Journal Year:
2024,
Volume and Issue:
60(10)
Published: Oct. 1, 2024
Abstract
In
arid
regions
with
limited
water
resources,
numerous
reservoirs
have
been
built
to
support
economic
and
social
development.
However,
how
the
construction
of
interacts
surrounding
ecosystem
affect
temperature
remains
unclear.
Spanning
2018
2022
in
Shiyang
River
Basin,
we
collected
surface
precipitation,
as
well
stem
soil
samples.
Using
isotopic
methods,
quantified
evaporation
oasis
reservoir‐riparian
forest
system
affects
local
climate.
Our
findings
show
that
latent
heat
released
by
evapotranspiration
from
reservoir
riparian
reduces
daily
maximum
range
7°C
6°C
respectively,
compared
downstream
areas
sparse
vegetation
around
artificial
lakes.
Additionally,
it
enhances
moisture
recycling,
increasing
precipitation.
This
study
reveals
regional
cooling
effect
due
interactions
between
bodies,
atmosphere,
vegetation.
We
propose
establishing
systems
can
positively
impact
climate
regulation
serve
an
effective
strategy
for
adapting
global
warming.
npj Clean Water,
Journal Year:
2025,
Volume and Issue:
8(1)
Published: Jan. 6, 2025
This
study
is
the
first
to
quantify
migration
processes
of
riverine
microplastics
under
different
connectivity
contexts
based
on
spatial
variation
characteristics
microplastic
loads.
Microplastics
in
multidammed,
single-dammed,
and
nondammed
rivers
are
significantly
three
categories:
abundance,
flux,
inventory.
Artificial
damming
can
lead
multicategory
reorganization
microplastics,
including
size,
polymer
type,
shape,
color.
has
led
formation
hotspots
river
waters
sediments
due
reduced
mobility.
Notably,
low-velocity
regions
non-dammed
high
hotspot
for
deposition,
their
inventories
may
even
be
10.63–12.71
times
higher
than
those
other
riverbeds.
Additionally,
results
abundance
differ
from
loads,
which
some
cases
showed
contradictory
results.
Therefore,
future
studies
must
incorporate
loads
into
assessment
enhance
our
understanding
fate
systems.
Water Resources Research,
Journal Year:
2024,
Volume and Issue:
60(1)
Published: Jan. 1, 2024
Abstract
Construction
of
river
infrastructure,
such
as
dams
and
weirs,
is
a
global
issue
for
ecosystem
protection
due
to
the
fragmentation
habitat
hydrological
alteration
it
causes.
Accurate
barrier
databases,
increasingly
used
determine
ecologically
sensitive
management,
are
challenging
generate.
This
especially
so
in
large,
poorly
mapped
basins
where
only
large
tend
be
recorded.
The
Mekong
one
world's
most
biodiverse
but,
like
many
rivers,
impacts
on
from
infrastructure
documented.
To
demonstrate
solution
this,
enable
more
basin
we
generated
whole‐basin
database
Mekong,
by
training
Convolutional
Neural
Network
(CNN)–based
object
detection
models,
best
which
was
identify
10,561
previously
unrecorded
barriers.
Combining
manual
revision
merged
with
existing
database,
our
new
Basin
contains
13,054
Existing
databases
Lower
documented
under
∼3%
barriers
recorded
CNN
combined
checking.
Nam
Chi/Nam
Mun
region,
eastern
Thailand,
fragmented
area
within
basin,
median
[95%
CI]
density
15.53
[0.00–49.30]
per
100
km,
Catchment
Area‐based
Fragmentation
Index
value,
calculated
an
upstream
direction,
1,178.67
[0.00–6,418.46],
construction
sluice
gates.
CNN‐based
framework
effective
potentially
can
transform
ability
across
facilitate
ecologically‐sensitive
management.
Geophysical Research Letters,
Journal Year:
2024,
Volume and Issue:
51(20)
Published: Oct. 21, 2024
Abstract
Damming
profoundly
affects
downstream
flow‐sediment
regimes,
altering
channel
bar
dynamics
and
thereby
affecting
floods
riverine
biodiversity.
Here,
we
investigate
the
response
of
bars
to
upstream
damming
by
examining
patterns,
mechanisms,
impacts
in
Middle
Yangtze
River
(∼1,000
km).
Over
a
decade
post‐damming
observational
data
reveal
substantial
increases
revegetation
Leaf
Area
Index.
Shorter
flood
duration
stable
size
collectively
drive
greening.
Consequently,
denser
vegetation
has
slowed
flow
velocity
17%
±
2%
increased
resistance
21%
5%,
offsetting
water‐level
decrease
from
expansion
due
scouring
even
causing
slight
rise
floodwater
levels.
Furthermore,
markedly
altered
river
connectivity,
thermal
solute
dynamics,
detrimentally
fish
habitats
aquatic
life.
These
findings,
along
with
refined
stage
simulation
considering
flow‐sediment‐vegetation
interactions,
facilitate
sustainable
reservoir
operation
management
big
systems.
Hydrological Processes,
Journal Year:
2025,
Volume and Issue:
39(1)
Published: Jan. 1, 2025
ABSTRACT
Monitoring
river
connectivity
across
large
regions
is
essential
for
understanding
hydrological
processes
and
environmental
management.
However,
comprehensive
assessments
of
are
often
hindered
by
inaccurate
dam
databases,
which
biased
towards
larger
dams
while
overlooking
smaller
or
low‐head
dams.
To
enhance
the
accuracy
assessments,
we
developed
three
advanced
convolutional
neural
networks
(CNNs;
YOLOv5,
Advance‐You
Only
Look
Once
[YOLO],
Faster
R‐CNN)
to
accurately
classify
evaluate
using
high‐resolution
(1
m)
remote
sensing
imagery.
The
evaluation
results
showed
that
Advance‐YOLO
performs
best
with
an
average
mean
precision
(mAP)
86.6%,
R‐CNN
mediocrely
mAP
77.9%.
Applying
well‐trained
model
in
Tarim
River
Basin
(China),
one
largest
inland
basins
around
globe,
found
there
currently
135
total
on
its
sources.
Conversely,
existing
public
database
underestimates
85.9%
Notably,
a
14.3%
decline
over
past
decade,
current
density
four
source
rivers
1.12
per
10
000
km
2
.
overestimated
83.9%.
here
enhances
assessment
areas
long
period,
thereby
fostering
more
research
effective
water
resource
