EarthArXiv (California Digital Library),
Год журнала:
2023,
Номер
unknown
Опубликована: Май 16, 2023
The
concept
of
environmental
flows
(E-Flows)
describes
the
streamflow
that
is
necessary
to
maintain
river
ecosystems.
Although
a
large
number
methods
have
been
developed,
delay
was
recorded
in
implementing
E–Flows
non-perennial
rivers.
general
aim
paper
analyse
criticalities
and
current
state
implementation
E-Flows
rivers
southern
Europe.
specific
objectives
were
(i)
European
Union
(EU)
national
legislation
on
E-Flows,
(ii)
methodologies
currently
adopted
for
setting
EU
Member
States
(MSs)
Mediterranean
Region
(Spain,
Greece,
Italy,
Portugal,
France,
Cyprus,
Malta).
From
analysis
legislations,
it
possible
acknowledge
step
forward
toward
regulatory
unification
at
level,
subject
more
generally
protection
aquatic
definition
most
countries,
has
abandoned
idea
regime
constant
minimal
flow,
but
recognizes
importance
biological,
chemical-physical
aspects
connected
it.
through
review
case
studies,
one
can
surmise
science
still
an
emerging
discipline.
limited
availability
hydrological,
hydraulic,
biological
data
as
well
restricted
economic
resources
allocated
managing
are
main
causes
MSs.
results
present
study
may
contribute
E-Flow
Environmental Pollution,
Год журнала:
2022,
Номер
316, С. 120553 - 120553
Опубликована: Ноя. 5, 2022
This
study
comprises
a
critical
review
of
modeling
pesticides
in
surface
waters.
The
aim
was
to
update
the
status
use
models
simulate
fate
from
diffuse
sources.
ISI
papers
were
selected
on
Scopus
and
information
concerning
areas,
type
(herbicides,
fungicides
insecticides),
model,
methodology
adopted
(i.e.,
calibration
and/or
validation,
spatial
temporal
scales)
analyzed.
studies
carried
out
Europe
(55.5%),
North
America
(22.3%),
Asia
(13.9%)
South
(8.3%).
Soil
Water
Assessment
Tool
proved
be
most
used
model
(45.95%).
Herbicides
modeled
(71.4%),
followed
by
insecticides
(18.2%)
(10.4%).
main
herbicides
atrazine,
metolachlor,
isoproturon,
glyphosate,
acetochlor.
Insecticides
such
as
chlorpyrifos
metaldehyde.
Chlorothalonil,
tebuconazole)
widely
investigated.
Based
published
studies,
it
found
that
approaches
for
assessing
are
constantly
evolving
algorithms
work
well
with
diverse
watershed
conditions,
management
strategies,
pesticide
properties.
Several
reported
concentrations
exceeding
ecotoxicological
thresholds
revealing
water
contamination
agriculture
urban
areas
is
priority
issue
current
global
concern.
Journal of Hydrology Regional Studies,
Год журнала:
2024,
Номер
52, С. 101698 - 101698
Опубликована: Фев. 9, 2024
Catchment
in
Southern
Italy.
Mediterranean
waterways
are
commonly
non-perennial;
they
vulnerable
to
climate
change
(CC).
Their
management
is
particularly
complex
due
limited
data
availability.
This
work
aims
develop
a
methodology
for
setting
an
Environmental
Flow
regime
(E-Flows)
temporary
river
(Locone,
Italy)
under
availability
and
CC.
As
observed
long-term
time
series
of
streamflow
natural
conditions
were
not
available,
the
Soil
Water
Assessment
Tool
model
(SWAT+)
was
applied
simulate
daily
baseline
period
(1980–2010)
future
(2020–2050)
based
on
projections,
respectively.
A
specific
workflow
developed
calibration
focusing
low
flows.
The
hydrological
characterized
by
means
Indicators
Hydrological
Alteration
(IHAs),
whereas
Range
Variability
Approach
(RVA)
define
E-Flows.
basin
experiencing
statistically
significant
increase
air
temperatures
from
1971
2020,
which
also
predicted
continue
future.
Consequently,
average
annual
monthly
winter
spring
expected
decrease.
calibration,
multi-objective
evaluation,
improved
low-flow
simulation.
detected
differences
IHAs
periods
should
be
considered
water
when
E-Flows
rivers.
Journal of Environmental Management,
Год журнала:
2023,
Номер
342, С. 118097 - 118097
Опубликована: Май 15, 2023
The
concept
of
environmental
flows
(E-Flows)
describes
the
streamflow
that
is
necessary
to
maintain
river
ecosystems.
Although
a
large
number
methods
have
been
developed,
delay
was
recorded
in
implementing
E-Flows
non-perennial
rivers.
general
aim
paper
analyse
criticalities
and
current
state
implementation
rivers
southern
Europe.
specific
objectives
were
(i)
European
Union
(EU)
national
legislation
on
E-Flows,
(ii)
methodologies
currently
adopted
for
setting
EU
Member
States
(MSs)
Mediterranean
Region
(Spain,
Greece,
Italy,
Portugal,
France,
Cyprus,
Malta).
From
analysis
legislations,
it
possible
acknowledge
step
forward
toward
regulatory
unification
at
level,
subject
more
generally
protection
aquatic
definition
most
countries,
has
abandoned
idea
regime
constant
minimal
flow,
but
recognizes
importance
biological,
chemical-physical
aspects
connected
it.
through
review
case
studies,
one
can
surmise
science
still
an
emerging
discipline.
limited
availability
hydrological,
hydraulic,
biological
data
as
well
restricted
economic
resources
allocated
managing
are
main
causes
MSs.
results
present
study
may
contribute
E-Flow
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Март 16, 2024
Abstract
The
present
work
aimed
to
predict
the
fate
of
two
pesticides,
copper
(Cu)
and
glyphosate
in
a
Mediterranean
basin
with
an
intermittent
river
assess
ecotoxicological
risk
related
their
presence
water
bodies
coupling
field
measurements
streamflow
pesticide
concentrations,
eco-hydrological
model.
Soil
Water
Assessment
Tool
(SWAT)
model
was
calibrated
and,
subsequently
used
predicted
environmental
concentrations
pesticides
surface
waters.
Cu
assessed
at
reach
scale
by
using
Toxicity
Exposure
Ratio
approach
(TER).
Measurements
(<
0.5
μg
l
−1
)
exceeded
maximum
European
threshold
quality
standards
for
(EQS)
0.1
.
High
were
wet
season
September,
when
is
mostly
vineyards
olive
grove
productions.
Acute
(TER
<
100)
associated
detected
several
reaches.
6.5
),
mainly
as
fungicide
vineyards,
results
assessment
revealed
that
November
January
critical
months
during
which
most
reaches
showed
chronic
Cu.
Water,
Год журнала:
2025,
Номер
17(2), С. 271 - 271
Опубликована: Янв. 18, 2025
In
Taiwan,
rivers
have
steep
slopes
and
short
lengths,
making
it
difficult
to
retain
water
in
the
rivers.
Therefore,
understanding
flow
characteristics
is
essential.
This
study
analyzes
data
from
65
stations
with
over
30
years
of
records
characterize
annual
mean
number
low-flow
days,
variability,
seasonality
occurrences.
The
analysis
uses
indices
such
as
intermittency
ratio,
Richards–Baker
flashiness
index,
six-month
dry
period
(SD6)
evaluates
trends
these
using
Mann–Kendall
test.
results
show
that
nearly
70%
an
ratio
less
than
0.1,
although
days
has
significantly
increased
time.
Stations
southwestern
watersheds
exhibit
higher
variability;
however,
variability
are
not
statistically
significant.
Low-flow
events
predominantly
occur
during
season,
68%
experiencing
them
between
January
March.
findings
on
their
long-term
provide
references
for
river
management
resource
planning
future.
Applied Water Science,
Год журнала:
2023,
Номер
13(7)
Опубликована: Июнь 9, 2023
Abstract
Climate
change
affects
ecosystems,
agriculture,
human
health,
forestry,
and
water
resource
availability.
This
study
is
mainly
aimed
at
assessing
the
climate
effect
on
resources
of
Kessie
Watershed
in
Upper
Blue
Nile
Basin,
Ethiopia.
The
updated
Coupled
Model
Intercomparison
Project
Phase
6
(CMIP-6)
data
outputs
were
used.
three
model
outputs:
ACESS_ESM1-5,
FGOALS_g3,
GFDL_ESM4
with
two
shared
socioeconomic
pathways
(SSP2-4.5
SSP5-8.5)
scenarios,
output
rainfall
temperature
downscaled
to
station
level
through
bias
correction.
catchment
hydrology
was
represented
by
SWAT—Soil
Water
Assessment
Tool—through
calibration
validation.
Future
temperatures
evaluated
Mann–Kendall
trend
test
Sen’s
slope
estimator.
analysis
streamflow
simulation
done
time
horizons:
2050s
(2041–2070)
2080s
(2071–2100).
baseline
(1985–2014)
used
as
a
reference.
global
projection
indicated
mean
annual
precipitation
show
slight
increase
for
future
both
scenarios
all
outputs.
According
SSP2-4.5
SSP5-8.5
respectively,
expected
5%
4.89%
10.13%
6.8%
based
ACCESS_ESM1-5;
4.7%
3.8%
4.3%
4.84%
FGOALS_g3;
4.67%
3.81%
models
data.
Yearly
average
maximum
may
3.62
°C
1.87
3.31
2.99
ACCESS
ESM1-5,
1.76
1.25
3.44
2.61
FGOALS-g3,
2.15
3.83
1.37
2.66
GFDL-ESM4
Similarly,
minimum
also
2.73
1.90
5.63
4.52
3.04
2.43
3.55
4.36
2.31
3.29
2050s,
3.16
3.87
increase.
In
simulated
from
12.1
21.8%
9.8
15.4%
SSP5-8.5,
whereas
2080s,
15.14
24.08%
13.08
41%
respectively.
potential
case
watershed
seems
able
support
irrigation
other
projects.
Ecosistemas,
Год журнала:
2024,
Номер
unknown, С. 2655 - 2655
Опубликована: Март 9, 2024
Los
ríos
temporales
(RTs)
son
ecosistemas
fluviales
en
los
que
efectos
de
las
perturbaciones
antrópicas
se
mezclan
con
la
propia
perturbación
natural
impone
temporalidad
del
flujo.
A
pesar
avances
el
conocimiento
RTs,
todavía
persisten
muchas
lagunas
limitan
desarrollo
metodologías
adecuadas
para
evaluación
su
estado
ecológico.
En
esta
revisión
identificamos
retos
actuales
correcta
ecológico
RTs
y
analizamos
oportunidades
existentes
hacerles
frente.
Estos
centran
en:
diferenciación
entre
naturales
o
hidrológicamente
impactados,
antrópicas,
índices
biológicos
pozas
desconectadas
cauces
secos,
adaptación
hidrogeomorfológicos,
aplicación
teoría
metacomunidades
RTs.
Las
están
relacionadas
con:
uso
nuevas
herramientas
moleculares,
existencia
alternativos
a
tradicionales,
disponibilidad
datos
poder
hacer
modelización,
implicación
social
hidrológico
La
centra
mayoritariamente
científico
gestión
acumulado
desde
implementación
DMA
España,
pero
recoge
experiencias
otros
mundo
guiar
acciones
conservación
estos
únicos
altamente
amenazados
por
cambio
global.
