Assessment of soil erosion and sediment yield in response to land use and land cover changes using geospatial techniques in Dumuga Watershed, Ethiopia
All Earth,
Journal Year:
2025,
Volume and Issue:
37(1), P. 1 - 18
Published: Feb. 3, 2025
Soil
erosion
and
sediment
yield
driven
by
land
use
cover
changes;
pose
severe
threats
to
ecological
sustainability,
agricultural
productivity,
watershed
health.
This
study
evaluates
soil
in
the
Dumuga
Watershed,
Ethiopia,
from
1993
2023,
with
a
focus
on
impact
of
changes.
Utilising
time
series
Landsat
data
(TM,
ETM+,
OLI/TIRS),
analyzes
key
factors
influencing
erosion,
including
rainfall
erosivity,
erodibility,
slope
steepness,
management,
conservation
practice.
The
findings
highlight
dramatic
shift
use,
cultivated
increasing
62.3%
(915.3
km2)
77.0%
(1,132.0
forest
declining
sharply
13.3%
(196.0
3.8%
(56.2
km2).
transformation
has
exacerbated
maximum
loss
rising
726.7
tons/ha/year
937.8
2023.
area
classified
under
very
increased
41.0%
54.1%,
directly
correlating
rise
yield.
These
underscore
urgent
need
for
targeted
strategies
mitigate
enhance
retention,
restore
balance.
Therefore,
implementing
integrated
management
approaches
is
essential
safeguarding
watershed's
long-term
productivity
resilience.
Language: Английский
Optimizing Well Placement for Sustainable Irrigation: A Two-Stage Stochastic Mixed Integer Programming Approach
Water,
Journal Year:
2024,
Volume and Issue:
16(19), P. 2715 - 2715
Published: Sept. 24, 2024
Utilizing
groundwater
offers
a
promising
solution
to
alleviate
water
stress
in
Ethiopia,
providing
dependable
and
sustainable
source,
particularly
regions
with
limited
or
unreliable
surface
availability.
However,
effective
decision-making
regarding
well
drilling
placement
is
essential
maximize
resource
potential,
enhancing
agricultural
productivity,
reducing
hunger,
bolstering
food
security
Ethiopia.
This
study
concentrates
on
the
development
of
two-stage
stochastic
mixed
integer
programming
(SMIP)
models
optimize
for
irrigation,
considering
uncertain
demand
scenarios.
Additionally,
deterministic
model
formulated
comparison
SMIP.
Experiments
are
conducted
explore
various
scenario
distributions,
revealing
that
optimized
total
cost
SMIP
generally
exceeds
setting,
aligning
SMIP’s
focus
long-term
benefits.
Moreover,
slight
differences
observed
layouts
under
different
assumption
The
also
examines
impact
selected
parameters,
such
as
fixed
construction
costs,
per-meter
out-of-sample
performance
shows
more
flexible
resilient,
11%
4%
lower
costs
than
cases
1
3,
respectively.
flexibility
provides
robust
strategy
allocation
management.
Language: Английский