Ecological Questions,
Год журнала:
2024,
Номер
35(3), С. 1 - 27
Опубликована: Март 18, 2024
This
study
assesses
groundwater
vulnerability
in
Owerri,
Nigeria,
using
Vertical
Electrical
Sounding
(VES)
and
Geographic
Information
System
(GIS)-based
DRASTIC
modeling.
The
research
methodology
includes
literature
review,
field
survey,
geological
feature
mapping,
hydrogeological
assessment,
geo-electrical
sounding,
data
interpretation.
a
rapidly
developing
city
with
flat
topography
growing
population,
uses
the
model
to
construct
map.
evaluates
risk
of
contamination
seven
critical
criteria,
including
depth
water
table,
net
recharge,
aquifer
media,
soil
topography,
vadose
zone
impact,
hydraulic
conductivity.
Each
parameter
was
given
weight
rating,
Index
(DI)
calculated
by
summing
products
weights
ratings
for
each
factor.
results
assessment
indicated
that
approximately
49%
area
falls
into
high
category,
around
45%
is
classified
as
moderate
vulnerability,
remaining
6%
labeled
low
vulnerability.
reveals
zones
due
factors
like
lower
slope
terrain,
permeable
impact.
use
VES
GIS-based
mapping
techniques
provides
insights
aiding
sustainable
resource
management
environmental
protection.
findings
emphasize
importance
understanding
potential
risks
need
effective
strategies
safeguard
clean
supplies.
Further
mitigation
efforts
should
focus
on
highly
vulnerable
areas.
HydroResearch,
Год журнала:
2023,
Номер
7, С. 71 - 85
Опубликована: Дек. 5, 2023
This
work
was
set
up
to
appraise
the
quality
of
groundwater
within
a
newly
established
university
using
index-based
techniques
and
intention
is
generate
vulnerability
potential
maps
that
can
guide
in
avoiding
vulnerable
aquifer
systems.
The
study
used
geo-electrical
technology
evaluate
lithological
sequence
hydrogeological
units
their
first-and
second-order
geo-electric
properties,
as
well
geochemical
constituents
groundwater.
results
showed
are
composed
sequences
sands,
including
fine
gravelly
sands
minimally
laced
with
sandy
clay,
according
technology.
Layers
2
3
were
accessible
by
twenty
VES
(V1-V20)
which
current
gained
access
designated
economic
prospective
systems
considered
have
resistivity
values
ranging
from
26.3
3576.5Ωm
mean
value
832.97Ωm.
five
models
deployed
very
high
spatial
variability
moderate
negative
positive
binary
correlations,
construed
be
due
subjectivity
weight-rate
assignment.
coefficients
variation
(CV)
sensitivity
analysis
(SA)
indicated
index
topography
(9.7%)
impact
vadose
zone
(4.3%),
marginally
higher
than
1.6%
displayed
other
parameters.
WHO's
disallowed
concentrations
heavy
ions,
SA
CV
for
contamination
variably
cadmium
ions
(140.9%)
followed
manganese
(132%)
copper
(88.
2%)
across
wells.
moderately
variable
contribution
distributions
wells
nickel
(48.8%),
lead
(41.6%),
chromium
(39.8%)
iron
(35.0%).
All
geophysical
indices
affirm
contaminated
therefore
requires
monitoring
management.
Modeling Earth Systems and Environment,
Год журнала:
2023,
Номер
9(4), С. 4363 - 4381
Опубликована: Март 31, 2023
Abstract
The
recent
research
is
carried
out
to
model
the
characteristics
and
productivity
of
groundwater
aquifer
in
Omdurman
area,
Sudan,
by
combining
electrical
resistivity
pumping
test
methods.
most
populous
city
known
as
traditional
capital
Sudan.
Vertical
sounding
(VES)
survey
using
Schlumberger
array
along
four
profiles
delineate
potential
zones.
Application
1D
geophysical
inversion
revealed
five
geoelectric
layers,
including
deposits,
clay,
silicified
ferruginous
sandstone,
sandstone.
Additionally,
based
on
outcome
VES
inversion,
Dar
Zarrouk
parameters,
transverse
resistance
longitudinal
conductance,
were
calculated
characteristics.
ranged
from
5587
309,853
Ωm
2
,
while
conductance
varied
between
0.14
2.5
Ω
−1
.
hydraulic
conductivity
transmissivity
are
further
measured
data,
ranging
1.4
5.2
m/d
435
1564
m
/day,
respectively.
step-drawdown
tests
performed
evaluate
thus
validate
result
geoelectrical
method.
obtained
step
583
1226
showing
an
acceptable
agreement
with
those
data.
Based
classified
highly
productive
ideal
for
development.
drawdown
was
used
assess
performance
wells.
results
indicated
that
faulty
well
design
inappropriate
rates
influence
some
wells
study
resulting
high
low
efficiency.
Overall,
objectives
successfully
achieved;
nonetheless,
detailed
hydrogeological
investigations
recommended
comprehensive
evaluation
aquifer.
HydroResearch,
Год журнала:
2023,
Номер
6, С. 73 - 88
Опубликована: Янв. 1, 2023
Groundwater
is
a
crucial
resource
for
communities
and
plays
significant
role
in
the
economy,
especially
regions
where
surface
water
sources
are
limited
or
unreliable.
Nigerian
Northeastern
basement
complexes
unique
geologic
formations
with
specific
hydrological
characteristics
that
impact
groundwater
availability
quality.
However,
there
lack
of
comprehensive
information
on
potential
these
areas,
hindering
effective
management.
To
address
this
gap,
study
focuses
application
geospatial
electrical
techniques
to
map
assess
Pulka,
northeastern
complex
Nigeria.
This
research
used
methodology
delineate
groundwater-prospective
areas
Northern
Nigeria,
aid
VES
technique
was
integrated
Schlumberger
electrode
configuration,
Shuttle
Radar
Topography
Mission
(SRTM),
which
were
as
input
datasets.
Lineament
drainage
density,
lithology
slope,
land
use
cover,
thematic
maps
created
GIS
rasters.
The
value
estimates
allotted
based
pair-wise
examination
elements
appeared
be
important
accumulation,
retention,
transportation.
Analytical
Hierarchy
Process
(AHP)
software
incorporate
five
components
impacting
suitability
movement
using
weighted
layering.
hydraulic
conductivity
longitudinal
conductance
Pulka
greatest
towards
west,
maximum
values
0.0665
m/day
1.75
S,
respectively.
Transverse
resistance
transmissivity
eastern
section
48.29
m2/day
9000
m,
Based
our
SRTM,
most
soil
type,
represented
43%;
lineament
33%;
13%;
7%;
accounted
least
(around
4%
overall
contributions).
has
enormous
development
sustainable
profitable
extractions,
according
analysis
geo-electrical
techniques.
Water Practice & Technology,
Год журнала:
2023,
Номер
18(12), С. 3347 - 3364
Опубликована: Ноя. 23, 2023
Abstract
Water
borehole
failures
in
Nigeria's
middle
Benue
Trough
are
caused
by
imprecise
aquifer
features.
This
study
employed
empirical
data
to
understand
hydraulic
parameters,
anticipate
regional
groundwater
potential,
and
explain
difficult
geological
locations.
89
VES
stations
quantitative
interpretation
were
required
determine
the
geoelectric
properties
beneath
each
station.
Aquifer
layers
delineated
their
resistivity
thickness
combined
using
geo-environment
specific
relations
yield
transmissivity,
conductivity
for
both
basement
complex
sedimentary
environments
variously.
Results
show
that
ranges
from
4.5
–
984.4
ohm-m;
layer
varies
4.4
m
96.7
with
average
thicknesses
environment
considerably
greater;
conductivities
range
0.056
30.15
m/day,
Transmissivity
values
0.31
1281.36
m2/day.
Log
transformed
transmissivity
3.51
7.1
Approximately
60.34%
of
entire
area
falls
within
magnitude
III
IV
can
only
support
withdrawals
local
water
supply
adequate
small
communities
private
consumption
this
may
be
inferred
cause
low
high
failure
rates.
Understanding
characteristics
is
critical
6controlling
groundwater;
research
advances
knowledge
terrain.
Abstract
Groundwater
plays
a
crucial
role
in
Hungary
sustaining
ecosystems
and
meeting
the
growing
demand
for
freshwater
to
fulfill
domestic
agricultural
needs.
This
study
employs
analytical
hierarchy
process
(AHP)
methodology
delineate
groundwater
potential
zones
Debrecen
area,
Hungary.
To
ensure
robustness
reliability
of
zoning,
geophysical
data
are
utilized
validation
purposes.
In
AHP
modeling
seven
conditioning
factors
integrated,
including
geology,
topography,
slope,
land
use/land
cover,
precipitation,
drainage
density,
lineament
density.
The
integration
normalized
weights
each
factor
identified
three
(GWPZs)
assigned
as
moderate,
high,
very
high
potential.
result
model
is
further
validated
with
gravity
wireline
logging.
Gravity
subjected
spectral
analysis
forward
map
lineaments
detect
thickness
sedimentary
sequences.
indicated
that
these
sequences
varies
between
1.25
2.7
km,
deep
local
basin
delimited
by
normal
faults
situated
eastern
part
area.
Additionally,
well-logging
using
Csókás
method
provided
continuous
estimation
petrophysical
hydrogeological
parameters
along
main
hydrostratigraphical
units.
Accordingly,
uniform
distribution
hydraulic
conductivity
observed
area
due
presence
coarse-grained
incised
valley
deposits.
results
showed
close
agreement
models.
interdisciplinary
approach
advanced
mapping
valuable
insights
into
characteristics
aquifers
