Critical Reviews in Environmental Science and Technology,
Год журнала:
2023,
Номер
54(7), С. 509 - 532
Опубликована: Сен. 7, 2023
AbstractMachine
learning
(ML)
models
are
widely
used
methods
for
analyzing
data
from
sensors
and
satellites
to
monitor
climate
change,
predict
natural
disasters,
protect
wildlife.
However,
the
application
of
these
technologies
monitoring
managing
algal
blooms
in
freshwater
environments
is
relatively
new
novel.
The
commonly
(ABS)
so
far
artificial
neural
networks
(ANN),
random
forests
(RF),
support
vector
machine
(SVM),
data-driven
modeling,
long
short-term
memory
(LSTM).
In
past,
researchers
have
mostly
worked
on
predicting
effluent
parameters,
nutrients,
microculture,
area
weather
conditions,
meteorological
factors,
ground
waters,
energy
optimization,
metallic
substances
using
ML
models.
Most
studies
employed
performance
metrics
like
root
mean
squared
error,
peak
signal,
precision,
determination
coefficient
as
their
primary
model
measures
accuracy
analysis,
usage
transfer,
activation
function.
While
there
been
some
this
topic,
several
research
gaps
still
be
addressed.
most
significant
related
limited
different
algae
bloom
scenarios,
interpretability
models,
lack
integration
with
existing
systems.
Keeping
mind,
review
article
has
methodically
arranged
present
an
overview
past
studies,
limitations,
way
forward
toward
prediction
ABS,
thus
benefitting
future
area.
This
aims
summarize
that
available,
including
benchmarking
values.HighlightsReal-time
dynamics
essential
mitigating
blooms.Various
complexities
hinder
applications
current
algorithms
ABS.Activation
transfer
functions
can
selection
ABS.Integrated
drive
feature
engineering
control
ABS.Keywords:
Activation-functionalgae
bloomsmonitoringmachine
learningperformance
predictionHANDLING
EDITORS:
Hyunjung
Kim
Scott
Bradford
Disclosure
statementNo
potential
conflict
interest
was
reported
by
authors.
Environmental Science & Technology,
Год журнала:
2021,
Номер
55(4), С. 2357 - 2368
Опубликована: Фев. 3, 2021
Dissolved
oxygen
(DO)
reflects
river
metabolic
pulses
and
is
an
essential
water
quality
measure.
Our
capabilities
of
forecasting
DO
however
remain
elusive.
Water
data,
specifically
data
here,
often
have
large
gaps
sparse
areal
temporal
coverage.
Earth
surface
hydrometeorology
on
the
other
hand,
become
largely
available.
Here
we
ask:
can
a
Long
Short-Term
Memory
(LSTM)
model
learn
about
dynamics
from
intensive
(daily)
data?
We
used
CAMELS-chem,
new
set
with
concentrations
236
minimally
disturbed
watersheds
across
U.S.
The
generally
learns
theory
solubility
captures
its
decreasing
trend
increasing
temperature.
It
exhibits
potential
predicting
in
"chemically
ungauged
basins",
defined
as
basins
without
any
measurements
broadly
general.
misses
some
peaks
troughs
when
in-stream
biogeochemical
processes
important.
Surprisingly,
does
not
perform
better
where
more
are
Instead,
it
performs
low
variations
streamflow
DO,
high
runoff-ratio
(>0.45),
winter
precipitation
peaks.
Results
here
suggest
that
collections
at
sparsely
monitored
areas
to
overcome
issue
scarcity,
outstanding
challenge
community.
Environmental Research Letters,
Год журнала:
2023,
Номер
18(6), С. 063004 - 063004
Опубликована: Апрель 26, 2023
Abstract
Eutrophication
is
a
major
global
concern
in
lakes,
caused
by
excessive
nutrient
loadings
(nitrogen
and
phosphorus)
from
human
activities
likely
exacerbated
climate
change.
Present
use
of
indicators
to
monitor
assess
lake
eutrophication
restricted
water
quality
constituents
(e.g.
total
phosphorus,
nitrogen)
does
not
necessarily
represent
environmental
changes
the
anthropogenic
influences
within
lake’s
drainage
basin.
Nutrients
interact
multiple
ways
with
climate,
basin
conditions
socio-economic
development,
point-source,
diffuse
source
pollutants),
systems.
It
therefore
essential
account
for
complex
feedback
mechanisms
non-linear
interactions
that
exist
between
nutrients
ecosystems
assessments.
However,
lack
set
holistic
understanding
challenges
such
assessments,
addition
limited
monitoring
data
available.
In
this
review,
we
synthesize
main
freshwater
basins
only
include
but
also
sources,
biogeochemical
pathways
responses
emissions.
We
develop
new
causal
network
(i.e.
links
indicators)
using
DPSIR
(drivers-pressure-state-impact-response)
framework
highlights
interrelationships
among
provides
perspective
dynamics
basins.
further
review
30
key
drivers
pressures
seven
cross-cutting
themes:
(i)
hydro-climatology,
(ii)
socio-economy,
(iii)
land
use,
(iv)
characteristics,
(v)
crop
farming
livestock,
(vi)
hydrology
management,
(vii)
fishing
aquaculture.
This
study
indicates
need
more
comprehensive
systems,
guide
expansion
networks,
support
integrated
assessments
manage
eutrophication.
Finally,
proposed
can
be
used
managers
decision-makers
realistic
targets
sustainable
management
achieve
clean
all,
line
Sustainable
Development
Goal
6.
Nature Geoscience,
Год журнала:
2024,
Номер
17(6), С. 545 - 551
Опубликована: Июнь 1, 2024
Abstract
Aquifers
contain
the
largest
store
of
unfrozen
freshwater,
making
groundwater
critical
for
life
on
Earth.
Surprisingly
little
is
known
about
how
responds
to
surface
warming
across
spatial
and
temporal
scales.
Focusing
diffusive
heat
transport,
we
simulate
current
projected
temperatures
at
global
scale.
We
show
that
depth
water
table
(excluding
permafrost
regions)
conservatively
warm
average
by
2.1
°C
between
2000
2100
under
a
medium
emissions
pathway.
However,
regional
shallow
patterns
vary
substantially
due
variability
in
climate
change
depth.
The
lowest
rates
are
mountain
regions
such
as
Andes
or
Rocky
Mountains.
illustrate
increasing
influences
stream
thermal
regimes,
groundwater-dependent
ecosystems,
aquatic
biogeochemical
processes,
quality
geothermal
potential.
Results
indicate
following
pathway,
77
million
188
people
live
areas
where
exceeds
highest
threshold
drinking
set
any
country.
Abstract
How
does
climate
control
river
chemistry?
Existing
literature
has
examined
extensively
the
response
of
chemistry
to
short‐term
weather
conditions
from
event
seasonal
scales.
Patterns
and
drivers
long‐term,
baseline
have
remained
poorly
understood.
Here
we
compile
analyze
data
506
minimally
impacted
rivers
(412,801
points)
in
contiguous
United
States
(CAMELS‐Chem)
identify
patterns
chemistry.
Despite
distinct
sources
diverse
reaction
characteristics,
a
universal
pattern
emerges
for
16
major
solutes
at
continental
scale.
Their
long‐term
mean
concentrations
(
C
m
)
decrease
with
discharge
Q
),
elevated
arid
climates
lower
humid
climates,
indicating
overwhelming
regulation
by
compared
local
Critical
Zone
characteristics
such
as
lithology
topography.
To
understand
pattern,
parsimonious
watershed
reactor
model
was
solved
bringing
together
hydrology
(storage–discharge
relationship)
biogeochemical
theories
traditionally
separate
disciplines.
The
derivation
steady
state
solutions
lead
power
law
form
relationships.
illuminates
two
competing
processes
that
determine
solute
concentrations:
production
subsurface
chemical
weathering
reactions,
export
(or
removal)
discharge,
water
flushing
capacity
dictated
vegetation.
In
other
words,
watersheds
function
primarily
reactors
produce
accumulate
transporters
climates.
With
space‐for‐time
substitution,
these
results
indicate
places
where
dwindles
warming
climate,
will
elevate
even
without
human
perturbation,
threatening
quality
aquatic
ecosystems.
Water
deterioration
therefore
should
be
considered
global
calculation
future
risks.
Fluids,
Год журнала:
2023,
Номер
8(7), С. 212 - 212
Опубликована: Июль 19, 2023
The
significant
growth
of
artificial
intelligence
(AI)
methods
in
machine
learning
(ML)
and
deep
(DL)
has
opened
opportunities
for
fluid
dynamics
its
applications
science,
engineering
medicine.
Developing
AI
encompass
different
challenges
than
with
massive
data,
such
as
the
Internet
Things.
For
many
scientific,
biomedical
problems,
data
are
not
massive,
which
poses
limitations
algorithmic
challenges.
This
paper
reviews
ML
DL
research
dynamics,
presents
discusses
potential
future
directions.
Abstract
Excess
nutrient
pollution
contributes
to
the
formation
of
harmful
algal
blooms
(HABs)
that
compromise
fisheries
and
recreation
can
directly
endanger
human
animal
health
via
cyanotoxins.
Efforts
quantify
occurrence,
drivers,
severity
HABs
across
large
areas
is
difficult
due
resource
intensive
nature
field
monitoring
lake
chlorophyll‐
a
concentrations.
To
better
characterize
how
nutrients
interact
with
other
environmental
factors
produce
in
freshwater
systems,
we
used
spatially
explicit
temporally
matched
climate,
landscape,
in‐lake
characteristic,
inventory
data
sets
predict
conterminous
US
(CONUS).
Using
nested
modeling
approach,
three
random
forest
(RF)
models
were
trained
explain
spatiotemporal
variation
total
nitrogen
(TN),
phosphorus
(TP),
concentrations
EPA's
National
Lakes
Assessment
(
n
=
2,062).
Concentrations
TN
TP
most
important
predictors
and,
variables,
RF
model
accounted
for
68%
.
We
then
these
extrapolate
predictions
lakes
without
observations
∼112,000
CONUS.
Risk
high
highest
agriculturally
dominated
Midwest,
but
risk
emerge
hot
spots
country.
These
catchment
lake‐specific
results
help
managers
identify
potential
may
fuel
blooms,
prioritize
at‐risk
additional
monitoring,
optimize
management
protect
end
goals.