Environmental Research Communications,
Journal Year:
2023,
Volume and Issue:
5(12), P. 125002 - 125002
Published: Nov. 29, 2023
Abstract
The
external
nutrient
loading
significantly
affects
large
shallow
lakes,
particularly
those
with
intricate
rive
networks.
In
Lake
Taihu,
pollutant
discharge
standards
have
traditionally
been
quantified
based
on
water
environmental
capacity,
while
neglecting
the
response
characteristics
of
algal
growth
in
different
regions
to
boundary
inputs.
For
that
analysis,
this
study
first
estimated
river
loadings
16
most
significant
inflow
and
outflow
rivers
Taihu
from
2008
2020
explored
correlations
between
quality
parameters
lacustrine
chlorophyll-a
levels.
Results
highlighted
influence
high
input
permanganate
values
spring
levels
lake.
Based
this,
proposed
hypothesis
reducing
concentration
would
inhibit
growth,
which
was
further
validated
using
coupled
hydrodynamic
ecological
models.
simulation
results
indicated
reduction
during
decrease
summer,
especially
leading
a
notable
impact
peak
values.
However,
due
variations
background
concentrations
among
rivers,
extent
lake
showed
spatial
differences.
Additionally,
analysis
extracted
bloom
areas
revealed
there
still
remained
relatively
risk
blooms
occurring
main
regions,
autumn
when
increased
rapidly.
These
findings
emphasized
importance
formulating
reasonable
exogenous
schemes,
should
consider
variation
trend
pollutants,
as
well
zones
boundary.
Limnology and Oceanography,
Journal Year:
2023,
Volume and Issue:
68(10), P. 2274 - 2287
Published: Aug. 28, 2023
Abstract
Light
availability
for
phytoplankton
in
shallow
lakes
is
closely
related
to
non‐algal
light
attenuation
(Kd
NALA
,
the
fractional
absorption
by
substances,
such
as
suspended
sediments);
thus,
significant
changes
global
wind
speed
recent
decades
may
have
a
profound
effect
on
and
algal
blooms
lakes.
Herein,
eutrophic
Lake
Taihu
was
selected
investigate
long‐term
dynamics
of
its
blooms.
The
results
showed
that
Kd
decreased
from
approximately
3.5
2.5
m
−1
with
decreasing
2005
2021,
indicating
significantly
increased
despite
surface
photosynthetically
active
radiation
exhibiting
limited
variability
during
study
period.
In
addition,
both
experimental
(i.e.,
situ
nutrient
enrichment
experiments)
statistical
approaches
deviations
Trophic
State
Index
subindices)
indicated
growth
primarily
light‐limited
period
Taihu.
Consequently,
considerable
increases
fraction
observed
maximal
chlorophyll
yield
at
given
nitrogen
or
phosphorus
concentration
were
mostly
which
implied
allowed
utilize
“unused
nutrient‐capacity”
until
additional
algal‐turbidity
induce
further
limitation
limitation.
As
received
attention
existing
research,
we
revealed
an
underappreciated
mechanism
affects
biomass
influencing
availability,
effects
future
bloom
mitigation
efforts
Remote Sensing,
Journal Year:
2024,
Volume and Issue:
16(8), P. 1385 - 1385
Published: April 14, 2024
Inland
waters
consist
of
multiple
concentrations
constituents,
and
solving
the
interference
problem
chlorophyll-a
colored
dissolved
organic
matter
(CDOM)
can
help
to
accurately
invert
total
suspended
concentration
(Ctsm).
In
this
study,
according
characteristics
Multispectral
Imager
for
Inshore
(MII)
equipped
with
first
Sustainable
Development
Goals
Science
Satellite
(SDGSAT-1),
an
iterative
inversion
model
was
established
based
on
analysis
linear
regression
estimate
Ctsm.
The
Hydrolight
radiative
transfer
used
simulate
process
Lake
Taihu,
it
analyzed
effect
three
component
remote
sensing
reflectance.
characteristic
band
combinations
B6/3
B6/5
were
determined
using
correlation
different
bands
combinations.
By
combining
two
models,
a
complete
closed
Ctsm
formed,
which
successfully
verified
by
modeling
data
(R2
=
0.97,
RMSE
4.89
g/m3,
MAPE
11.48%)
SDGSAT-1
MII
image
verification
0.87,
3.92
8.13%).
And
compared
models
constructed
other
feature
published
models.
Remote
monitoring
carried
out
images
Taihu
in
2022–2023.
This
study
serve
as
technical
reference
satellite
terms
Ctsm,
well
improving
water
environment.
Journal of Hydrology Regional Studies,
Journal Year:
2023,
Volume and Issue:
51, P. 101635 - 101635
Published: Dec. 28, 2023
The
study
region
was
the
Tuojiang
River,
a
tributary
of
upper
Yangtze
River.
Sediment
phosphorus
(P)
release
remains
unclear
in
River
Southwest
China.
sediments
were
collected
from
upper,
middle,
and
lower
reaches
this
study.
potential
sediment
P
(percentage
saturation
zero
equilibrium
concentration,
EPCsat)
determined
by
isotherm
experiments.
influential
factors
mechanisms
on
explored.
mainly
acted
as
source
to
P.
Phosphorus
bound
Fe
oxides
(Fe-P),
organic
matter
(OM),
water
temperature
(T),
content
originally
adsorbed
(Q0)
most
EPCsat.
pH,
T,
or
disturbance
had
greatest
effect
exchangeable
(Ex-P),
(Org-P),
Fe-P.
FeCl3
has
an
inhibitory
release.
Fe-P
participates
process.
kinetics
well
fitted
pseudo-second-order
model.
These
results
obtained
could
help
understanding
pollution
status
sediment,
improve
our
knowledge
provide
significant
information
for
further
management
sediment.
