Impacts of climate and land use/cover changes on the sustainability of irrigation water in West Africa: a systematic review
All Earth,
Год журнала:
2024,
Номер
36(1), С. 1 - 13
Опубликована: Янв. 31, 2024
Climate
and
LULC
changes
have
a
great
influence
on
the
hydrological
processes
which
include
evapotranspiration,
infiltration,
surface
runoff,
groundwater
flow,
stream
discharge
regime.
This
study
aims
to
review
existing
literature
impacts
of
climate,
sustainability
irrigation
water
in
West
Africa.
The
future
Africa
will
be
driven
by
strong
external
factors,
such
as
rapid
population
growth,
climate
change,
change.
annual
average
temperature
is
between
25.9
34°C.
Rising
temperatures
affected
all
sectors,
including
resources,
increased
demand,
agricultural
production.
Reduction
precipitation
reduce
river
flows
increase
evaporation
due
drier
atmosphere,
thereby
reducing
amount
available
reservoirs
for
irrigation.
current
demand
freshwater
purposes
expected
triple
2050.
From
1997
2018,
forest
area
decreased
24.6%,
while
residential
land
areas
140%
11.7%,
respectively,
Effective
mitigation
adaptation
measures
are
policy
issue
observed
adverse
availability
Язык: Английский
Assessment of climate change impacts on hydrological processes in the Usangu catchment of Tanzania under CMIP6 scenarios
Journal of Water and Climate Change,
Год журнала:
2023,
Номер
14(11), С. 4162 - 4182
Опубликована: Окт. 26, 2023
Abstract
Climate
change
is
anticipated
to
have
long-term
effects
on
hydrological
processes
and
patterns,
leading
water
stress
in
agroecological
catchments.
escalates
scarcity
the
Usangu
catchment,
as
evidenced
by
drying
up
of
rivers
during
dry
season.
Therefore,
this
study
was
undertaken
assess
climate
impacts
hydrology
utilizing
Soil
Water
Assessment
Tool
(SWAT)
model
an
ensemble
mean
five
Global
Circulation
Models
(GCMs)
under
two
shared
socio-economic
pathway
(SSP)
emission
scenarios.
Downscaling
GCMs
performed
LARS-WG
statistical
downscaling
tool.
In
comparison
baseline
period,
short
rain
intervals
are
expected
occur
between
2030
2060,
with
a
annual
precipitation
increase
7
17%
SSP
2–4.5
5–8.5,
respectively.
Maximum
minimum
temperatures
rise
0.6–2
°C.
Corresponding
future
temperature
increases,
evapotranspiration
would
about
30%
decrease
yield
groundwater
recharge
26%
than
5–8.5.
However,
effect
shown
increased
surface
runoff
streamflow
wetter
months.
These
findings
provide
watershed
managers
crucial
information
for
planning
managing
catchment
light
changing
climate.
Язык: Английский
Advancements in remote sensing technologies for accurate monitoring and management of surface water resources in Africa: an overview, limitations, and future directions
Geocarto International,
Год журнала:
2024,
Номер
39(1)
Опубликована: Янв. 1, 2024
This
review
presents
a
comprehensive
examination
of
recent
advancements
in
utilizing
multi-date
satellite
data
to
analyze
spatial
and
temporal
variations
seasonal
inter-annual
surface
water
dynamics
within
arid
environments
Africa.
Remote
sensing
offers
continuous,
precise,
long-term
datasets
for
research.
Various
sensors
with
differing
resolutions
are
discussed,
high-resolution
multispectral
providing
superior
resolution
but
at
higher
costs.
Conversely,
dual-sensor
approaches,
incuding
optical
(Sentinel-2
Landsat),
radar
satellites
(Sentinel-1
RADARSAT)
UAVs
were
investigated.
The
further
examines
the
efficiency
applicability
traditional
algorithms
such
as
modified
normalized
difference
index
(MNDWI),
(NDWI),
automated
extraction
(AWEI)
detecting
delineating
resources.
Additionally,
machine
learning
(ML)
algorithms,
including
support
vector
machines
(SVM),
Random
Forest
(RF),
deep
emerging
methodologies
like
recurrent
tranformer
networks,
have
been
explored.
Therefore,
we
recommend
that
future
research
endeavours
focus
on
leveraging
imagery
integrating
physical
models
techniques,
artificial
intelligence,
online
big
processing
platforms
improve
mapping
capabilities.
Язык: Английский
Water resources availability in the Mefou basin, Cameroon: under current and future climate, and land use and land cover
Sustainable Water Resources Management,
Год журнала:
2024,
Номер
10(2)
Опубликована: Март 9, 2024
Язык: Английский
Application of the DKPR Method to Tropical Conditions Using an Integrated Approach to Assess the Vulnerability of Soubré Lake (Southwest, Côte d’Ivoire)
Water Conservation Science and Engineering,
Год журнала:
2025,
Номер
10(1)
Опубликована: Апрель 1, 2025
Язык: Английский
Availability of the current and future water resources in Equatorial Central Africa: case of the Nyong forest catchment in Cameroon
Environmental Monitoring and Assessment,
Год журнала:
2024,
Номер
196(3)
Опубликована: Фев. 24, 2024
Язык: Английский
Projected Changes in Dry and Wet Spells over West Africa during Monsoon Season Using Markov Chain Approach
Climate,
Год журнала:
2024,
Номер
12(12), С. 211 - 211
Опубликована: Дек. 6, 2024
This
study
examines
projected
changes
in
dry
and
wet
spell
probabilities
West
Africa
during
the
July–August–September
monsoon
season
using
a
Markov
chain
approach.
Four
simulations
of
regional
climate
models
from
CORDEX-Africa
program
were
used
to
analyze
intraseasonal
variability.
The
results
show
an
increase
probability
having
day,
day
preceding
decrease
days
Sahel
region
under
anthropogenic
forcing
scenarios
RCP4.5
RCP8.5.
is
stronger
far
future
RCP8.5
scenario
(up
−30%).
also
finds
that
consecutive
(lasting
at
least
7
10
days)
expected
western
Sahel,
central
Sudanian
Area
both
scenarios,
with
increases
scenario.
In
contrast,
over
Guinea
Coast,
being
more
important
RCP4.5.
Dry
increasing
areas
northern
linked
very
(R95P)
daily
rainfall
intensity
index
(SDII).
These
are
for
water
management
decisions
risk
reduction
energy
agricultural
sectors.
highlights
need
decision-makers
implement
mitigation
adaptation
policies
minimize
adverse
effects
change.
Язык: Английский
Availability of the current and future water resources in Equatorial Central Africa, case of the Nyong forest catchment in Cameroon
Research Square (Research Square),
Год журнала:
2023,
Номер
unknown
Опубликована: Окт. 10, 2023
Abstract
To
anticipate
disasters
(drought,
floods,
etc.)
caused
by
environmental
forcing
and
reduce
their
impacts
on
its
fragile
economy,
sub-Saharan
Africa
needs
a
good
knowledge
of
the
availability
current
water
resources
reliable
hydroclimatic
forecasts.
This
study
has
as
objective
to
quantify
in
Nyong
basin
predict
future
evolution
(2024–2050).
For
this,
SWAT
(Soil
Water
Assessment
Tool)
model
was
used.
The
performance
this
is
satisfactory
calibration
validation,
with
R
2
,
NSE
KGE
greater
than
0.64.
Biases
lower
−
14%
also
attest
performance.
In
investigated
basin,
infiltration
(GW_RCH),
evapotranspiration
(ETP),
runoff
(SURQ)
yield
(WYLD)
are
East,
probably
due
more
abundant
rainfall
part.
flows
sediment
load
(SED)
middle
zone
Southwest
certainly
because
relief
part,
which
corresponds
valley
floor.
Two
models
(CCCma
REMO)
decline
two
others
(HIRHAM5
RCA4)
opposite.
However,
based
statistical
carried
out
over
historical
period
(2001–2005),
CCCma
seems
most
reliable.
It
forecasts
drop
precipitation
runoff,
do
not
exceed
19%
18%,
respectively,
whatever
emission
scenario
(RCP4.5
or
RCP8.5).
Climate
variability
(CV)
only
whose
impact
visible
dynamics
flows,
modest
changes
observed
land
use
cover
(LULC).
results
could
contribute
improving
resource
management
studied
region.
Язык: Английский