The
sediment
resuspension
process
induced
by
the
wind-wave
in
large
shallow
lakes,
with
suspended
concentration(SSC)
and
phosphorus
fluctuation,
has
not
been
fully
understood.
To
gain
insight
into
dynamic
behaviors
of
Longgan
Lake
(LGL),
a
wind-exposed
lake
China,
continuous
water
quality,
depth,
high-frequency
synchronous
situ
observation
wave,
discrete
SSC,
phosphorous
data
were
collected.
results
showed
that
SSC
during
period
could
be
well
simulated
physically-based
model.
Meanwhile,
total
concentration(
)
column
can
almost
described
percentage
sediment(
)and
dissolved
concentration
column(
):
.
This
study
is
meaningful
to
understanding
cycling
helpful
management
this
kind
lake.
Ecological Indicators,
Год журнала:
2021,
Номер
127, С. 107736 - 107736
Опубликована: Апрель 30, 2021
As
a
highly
eutrophic
area,
Shenzhen
Bay
in
southern
China
has
accumulated
plant
dissolved
inorganic
nitrogen
(DIN)
and
phosphate
(PO43--P),
resulting
various
environmental
problems.
The
nutrient
loading
was
calculated
to
classify
runoff
patterns
of
the
bay
provide
possible
management
solutions.
However,
previous
studies
have
shown
that
external
alone
cannot
explain
source
nutrition
Bay.
In
our
study,
for
first
time,
we
proved
quantitatively
internal
main
contributor
total
input
fluxes
DIN
PO43--P
using
LOICZ
(land–ocean
interactions
coastal
zone)
model.
Our
results
showed
supplied
65
69%
PO43--P,
which
were
c.
4.0
×
106
0.3
mol/d,
respectively.
estimated
flux
from
terrigenous
1.38
0.1
mol/d
Notably,
sediment
resuspension
3.5–15.7
0.5–1.9
particle
bioavailable
Bay,
Moreover,
51
62%
exported
through
water
exchange
residual
flows
into
Pearl
River.
These
demonstrate
dynamics
losses
River
jointly
influence
eutrophication
process
International Journal of Digital Earth,
Год журнала:
2022,
Номер
15(1), С. 1676 - 1691
Опубликована: Окт. 10, 2022
In
this
study,
we
sampled
the
original
sediment
columns
from
three
points
located
in
eastern,
central,
and
western
areas
of
Chaohu
Lake,
then
investigated
resuspension
under
hydraulic
disturbances
laboratory.
The
results
showed
that
when
disturbance
is
weak
surface
shear
stress
small
(<0.02
N/m²),
layer
moves
alone.
When
moderate
within
a
threshold
(3.7
only
proportion
sediments
begins
to
move.
However,
further
strengthened
larger
than
value,
move
smoothly.
By
experimental
results,
found
plankton
about
1
mm
(1.56%
maximum
content
suspended
matter
(SSCmax)),
which
major
contribution
individual
initiation.
new
19–22
(20.9%
SSCmax),
considerably
affects
shallow
lakes.
consolidated
22
below
bed
surface,
requires
high
hard
be
transferred
water
column.
quantified
observation
are
verified
with
theoretical
results.
