The Science of The Total Environment,
Journal Year:
2024,
Volume and Issue:
915, P. 170091 - 170091
Published: Jan. 15, 2024
Ecological
thresholds
are
a
useful
indicator
for
implementing
ecological
management.
Many
studies
determine
the
nutrient
loads
in
lakes
based
on
maximum
allowable
concentration
of
chlorophyll
(Chla),
although
this
neglects
overall
performance
ecosystem.
A
PCLake
model
Baiyangdian
(BYD)
Lake
northern
China
was
constructed
with
six
network
analysis
(ENA)
indicators
that
characterized
ecosystem
function,
system
maturity,
and
food
web
structure
to
quantify
status
BYD
To
my
knowledge,
is
first
study
level
responses
phosphorus
load
interference.
Different
scenarios
were
designed
simulate
Lake.
The
simulated
results
employed
calculate
ENA
indicators.
determined
through
driving
response
relationship
between
gradient
show
non-linear
transition
under
gradient.
As
increases,
D/H,
SOI,
FCI
decreases
while
A/DC,
TPP/TR,
TPP/TB
increases.
This
indicates
function
will
deteriorate
if
0.50-1.32
mg
m
Water Resources Research,
Journal Year:
2021,
Volume and Issue:
57(4)
Published: March 24, 2021
Abstract
Depletion
of
dissolved
oxygen
(DO)
is
a
major
cause
fish
kills
in
urban
streams.
Although
forecasting
short‐term
DO
concentrations
streams
prior
to
hypoxic
events
necessary,
such
efforts
have
been
rarely
made.
In
this
study,
24‐h
models
were
developed
for
three
South
Korea.
To
forecast
the
at
outlet
sites,
which
coincide
with
kill
hot
spot
areas,
water
quality
parameters
lower
reaches
and
hydrometeorological
used
as
input
variables.
The
monitoring
data
measured
hourly
between
2017
2018
divided
into
training
test
sets
ratio
8:2.
Tenfold
cross
validation
was
performed
hyperparameter
optimization.
Due
dynamic
characteristics
discontinuity
time‐series
data,
long
memory
(LSTM)
neural
network
modeling
approach
selected.
Overall,
high
degree
accuracy
recorded
all
study
accuracy,
timing
magnitude
abrupt
depletion
well
captured.
Water
temperature
cumulative
precipitation
important
variables
stream
outlets.
particular,
importance
across
indicated
that
effects
nonpoint
sources
critical
depleting
Monitoring
both
outlets
conjunction
variable
analysis
enhanced
interpretability
LSTM
model
outputs.
This
improves
our
understanding
precursors
