Frontiers in Environmental Science,
Journal Year:
2022,
Volume and Issue:
10
Published: July 19, 2022
Monthly
runoff
forecasting
plays
a
vital
role
in
reservoir
ecological
operation,
which
can
reduce
the
negative
impact
of
dam
construction
and
operation
on
river
ecosystem.
Numerous
studies
have
been
conducted
to
improve
monthly
forecast
accuracy,
machine
learning
methods
paid
much
attention
due
their
unique
advantages.
In
this
study,
conjunction
model,
EEMD-SSA-LSTM
for
short,
comprises
ensemble
empirical
mode
decomposition
(EEMD)
sparrow
search
algorithm
(SSA)–based
long
short-term
neural
networks
(LSTM),
has
proposed
forecasting.
The
model
is
mainly
carried
out
three
steps.
First,
original
time
series
data
decomposed
into
several
sub-sequences.
Second,
each
sub-sequence
simulated
by
LSTM,
hyperparameters
are
optimized
SSA.
Finally,
results
summarized
as
final
results.
obtained
from
two
reservoirs
located
China
used
validate
performance.
Meanwhile,
four
commonly
statistical
evaluation
indexes
utilized
evaluate
demonstrate
that
compared
benchmark
models,
yield
satisfactory
be
conducive
improving
accuracy.
Computer Modeling in Engineering & Sciences,
Journal Year:
2023,
Volume and Issue:
138(1), P. 1 - 41
Published: Sept. 19, 2023
Forecasting
river
flow
is
crucial
for
optimal
planning,
management,
and
sustainability
using
freshwater
resources.
Many
machine
learning
(ML)
approaches
have
been
enhanced
to
improve
streamflow
prediction.
Hybrid
techniques
viewed
as
a
viable
method
enhancing
the
accuracy
of
univariate
estimation
when
compared
standalone
approaches.
Current
researchers
also
emphasised
hybrid
models
forecast
accuracy.
Accordingly,
this
paper
conducts
an
updated
literature
review
applications
in
estimating
over
last
five
years,
summarising
data
preprocessing,
modelling
strategy,
advantages
disadvantages
ML
techniques,
models,
performance
metrics.
This
study
focuses
on
two
types
models:
parameter
optimisation-based
(OBH)
hybridisation
preprocessing-based
(HOPH).
Overall,
research
supports
idea
that
meta-heuristic
precisely
techniques.
It's
one
first
efforts
comprehensively
examine
efficiency
various
(classified
into
four
primary
classes)
hybridised
with
revealed
previous
applied
swarm,
evolutionary,
physics,
metaheuristics
77%,
61%,
12%,
respectively.
Finally,
there
still
room
improving
OBH
HOPH
by
examining
different
pre-processing
metaheuristic
algorithms.
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Nov. 30, 2024
In
the
development
of
data-driven
models
for
streamflow
forecasting,
choosing
appropriate
input
variables
is
crucial.
Although
random
forest
(RF)
has
been
successfully
applied
to
forecasting
variable
selection
(IVS),
comparative
analysis
different
forest-based
IVS
(RF-IVS)
methods
yet
absent.
Here,
we
investigate
performance
five
RF-IVS
in
four
(RF,
support
vector
regression
(SVR),
Gaussian
process
(GP),
and
long
short-term
memory
(LSTM)).
A
case
study
implemented
contiguous
United
States
one-month-ahead
forecasting.
Results
indicate
that
enable
acquire
enhanced
comparison
widely
used
partial
Pearson
correlation
conditional
mutual
information.
Meanwhile,
performance-based
appear
be
superior
test-based
methods,
tend
select
redundant
variables.
The
RF
with
a
forward
strategy
finally
recommended
connect
GP
model
as
promising
combination
having
potential
yield
favorable
performance.
Journal of Hydrology Regional Studies,
Journal Year:
2023,
Volume and Issue:
46, P. 101328 - 101328
Published: Feb. 1, 2023
The
Ca
River
basin
is
located
in
the
North
Central
Coast
area
of
Vietnam
This
study
aims
to
develop
a
deep
learning
framework
that
both
effective
and
straightforward
order
forecast
water
levels
advance
multiple
time
steps
for
event
scales.
We
have
thoroughly
studied
assessed
two
models
(DLMs),
long-short
term
memory
(LSTM)
gated
recurrent
unit
(GRU),
their
capacity
levels,
focusing
on
various
aspects
such
as
influence
sequence
length
or
impact
hyperparameter
selection.
Besides,
data
scenarios
were
established
using
hydrological
from
eight
severe
floods
between
2007
2019
examine
effect
input
variables
model
performance.
Water
level
was
employed
(S1
S2),
whereas
precipitation
used
only
S2.
cross-validation
technique
dynamically
address
issue
limited
data.
inputs
reformatted
tensors
then
randomly
divided
into
subsets.
flexible
tuning
preserved
sequential
nature
while
enabling
DLMs
be
trained
efficiently.
findings
revealed
exhibited
equally
excellent
performances.
NSE
LSTM
varies
0.999–0.971
compared
0.998–0.974
GRU
model,
corresponding
cases
one
four-time
ahead.
indicated
use
multiple-input
types
(S2)
contrary
date
type
(S1)
does
not
necessarily
improve
forecasting
LSTM/GRU
with
hidden
layer
are
adequate
delivering
high
performance
minimizing
processing
time.