Environmental Technology,
Год журнала:
2017,
Номер
39(6), С. 787 - 803
Опубликована: Март 29, 2017
Danjiangkou
Reservoir
is
the
source
reservoir
of
Middle
Route
South-to-North
Water
Diversion
Project
(MRP).
Any
sudden
water
pollution
accident
in
would
threaten
supply
MRP.
We
established
a
3-D
hydrodynamic
and
quality
model
for
Reservoir,
proposed
scientific
suggestions
on
prevention
emergency
management
accidents
based
simulated
results.
Simulations
were
performed
20
hypothetical
pollutant
discharge
locations
3
assumed
amounts,
order
to
effect
spreading
under
different
operation
types.
The
results
showed
that
both
location
mass
affected
quality;
however,
types
had
little
effect.
Five
joint
regulation
scenarios,
which
altered
processes
conveyance
Taocha
dams,
considered
controlling
dispersion.
spread
could
be
effectively
controlled
through
two
dams
collaborative
critical
ensuring
security
along
The
paper
presents
the
results
of
a
study
heavy
metals
(HMs)
concentrations
in
six
retention
reservoirs
located
lowland
area
western
Poland.
objectives
this
were
to
analyze
Cd,
Cr,
Cu,
Ni,
Pb
and
Zn
concentrations,
assess
contamination
ecological
risk,
spatial
variability
HM
identify
potential
sources
factors
determining
concentration
distribution.
bottom
sediment
pollution
by
HMs
was
assessed
on
basis
index
geo-accumulation
(Igeo),
enrichment
factor
(EF),
load
(PLI)
metal
(MPI).
To
risk
associated
with
multiple
HMs,
mean
probable
effect
(PEC)
quotient
(Qm-PEC)
toxic
(TRI)
used.
In
order
determine
similarities
differences
between
sampling
sites
regard
concentration,
cluster
analysis
(CA)
applied.
Principal
component
(PCA)
performed
impact
grain
size,
total
organic
matter
(TOM)
content
site
location
Additionally,
PCA
used
catchment,
reservoir
characteristics
hydrological
conditions.
values
Igeo,
EF,
MPI
PLI
show
that
Ni
mainly
originate
from
geogenic
sources.
contrast,
come
point
related
agriculture.
PEC
TRI
value
greatest
occurred
at
inlet
near
dam.
showed
depends
silt
sand
content.
However,
Pb,
Cd
are
TOM
as
well.
relationship
individual
stronger
than
TOM.
indicate
exception
sources—weathering
rock
material.
may
additionally
depend
road
traffic.
more
frequent
water
exchange
has
higher
whereas
sediments
is
agricultural
Water,
Год журнала:
2024,
Номер
16(4), С. 514 - 514
Опубликована: Фев. 6, 2024
In
regions
where
drought
has
become
a
common
occurrence
for
most
of
the
year
and
agriculture
is
main
economic
activity,
development
hydro-agricultural
systems
made
it
possible
to
improve
water
management.
Despite
this,
intensification
combined
with
climate
change
leads
potential
decrease
in
quality
management
practices
are
essential
agro-environmental
sustainability.
The
aim
this
study
was
assess
irrigation
ecological
status
reservoir
(using
support
chemical
parameters).
results
showed
biological
oxygen
demand
values
above
maximum
stipulated
an
excellent
all
sampling
periods
except
April
2018
December
2020
(with
highest
10
mg
L−1
O2
dry
periods).
Most
total
nitrogen
concentrations
(TN)
surpassed
those
good
(0.96
≤
TN
2.44
N).
fact,
suspended
solids
were
parameters
used
classification.
From
perspective
according
FAO
guidelines
regarding
infiltration
rate,
these
waters
presented
light
moderate
levels
restrictions.
Thus,
revealed
that
its
impact
on
soil
rate
can
be
related,
part,
meteorological
conditions
intensive
agricultural
developed
around
drainage
basin.
that,
as
Lage
part
Brinches–Enxoé
hydraulic
circuit,
recirculation
also
important
factor
may
have
affected
obtained.
Furthermore,
experimental
design,
integrating
status,
parameters,
systems;
using
same
from
different
perspectives;
allowed
us
global
idea
contamination
agroecosystems,
improving
river
basin
processes.
Water,
Год журнала:
2020,
Номер
12(12), С. 3569 - 3569
Опубликована: Дек. 19, 2020
Salinization
and
sodification
are
important
processes
of
soil
degradation
affecting
irrigated
lands.
A
large
proportion
the
global
area
is
affected
by
some
degree
salinity
or
sodicity
caused
intensification
irrigation.
The
increase
frequency
adverse
climatic
conditions,
like
high
temperatures
variations
in
precipitation
patterns
climate
change,
will
potentially
amplify
these
arid,
semi-arid,
Mediterranean
areas.
use
integrated
approaches
for
spatial
temporal
prediction
risk
salinization
areas
great
value,
helping
decision-making
regarding
land
uses
choice
more
suitable
agricultural
practices.
In
this
study,
based
on
key
criteria
assessment
irrigation-related
(e.g.,
climate,
topography,
drainage,
water
quality
irrigation,
crop
irrigation
method),
we
developed
a
methodology
lands,
using
two
composite
indices,
Risk
(RSA)
index
Sodification
(RSO)
index.
application
indices
to
real
scenario
(a
Southern
Portugal)
showed
that
67%
presented
low
development,
68%
had
moderate
sodification,
16%
was
development.
Areas
under
(26%)
were
mostly
characterized
slopes
fine-textured
soils,
Luvisols
Vertisols,
with
limited
drainage
conditions.
incidence
slope
terrain,
moderate-to-restricted
clay
content
Luvisols,
Vertisols
Cambisols,
dominated
annual
crops
surface
sprinkler
systems.
These
tools
have
potential
be
used
resource
planning
policymakers
on-farm
management
decision
farmers,
contributing
sustainability
agriculture
regions.
