Water Practice & Technology,
Год журнала:
2024,
Номер
19(9), С. 3744 - 3762
Опубликована: Авг. 2, 2024
ABSTRACT
This
study
provides
prototypical
evaluation
of
groundwater
vulnerability
to
contamination
and
soil
corrosivity
in
the
Lokoja
region,
central
Nigeria.
By
combining
aquifer
index,
integrated
electrical
conductivity,
confinement
overlying
strata
depth
water
table
(GOD),
anisotropy
coefficient
(λ)
derived
from
lithological
composition,
resistivity,
layer
thickness,
identifies
substantial
vulnerabilities
resources.
Findings
indicate
that
over
70%
region
is
moderately
very
highly
vulnerable
pollution,
especially
eastern
southern
parts,
highlighting
need
for
tailored
management
strategies
areas,
covering
40%
region.
Corrosion
potential
varies
spatially,
with
80%
upper
being
minimally
corrosive
around
45%
lower
moisture-rich
showing
moderate
significant
corrosiveness,
emphasizing
risks
northern
zones
associated
compositions
moisture
content.
These
accentuate
necessity
rigorous
monitoring
programs
strict
land
use
regulations
protect
aquifers
infrastructure.
research
underscores
value
proactive
safeguarding
resources,
providing
an
invaluable
framework
decision-making
resource
allocation
tackle
corrosion
risks.
Importantly,
addresses
a
gap
limited
scientific
exploration.
Water Practice & Technology,
Год журнала:
2024,
Номер
19(2), С. 611 - 628
Опубликована: Янв. 31, 2024
Abstract
Characterization
of
aquifer
geo-hydraulic
properties
is
essential
for
groundwater
management
and
conservation.
This
work
demonstrates
the
use
electrical
resistivity
surveying
data
in
characterization
important
within
a
major
coastal
southern
Nigeria.
Geo-electrical
acquired
along
profile
lines
with
Schlumberger
array
configuration
were
used
to
determine
parameters
such
as
ρb,
water
ρw,
porosity
Φ,
formation
factor
F,
hydraulic
conductivity
K,
transmissivity
T,
permeability
Kp,
tortuosity
τ.
The
inversion
models
delineated
occurrence
four
lithological
layers,
geo-layers
ranging
from
2.4
4,393
Ω
m.
Contour
maps
created
show
distribution
various
geo-electrical
over
study
area.
Regression
curves
showing
relationship
between
generated
generate
empirical
relationships
parameters.
formulas
developed
these
will
aid
future
seeking
characterize
zones
model
units.
In
all,
was
found
be
noninvasive,
cost-effective,
efficient
method
characterizing
via
nonpoint
collected
earth's
surface.
Water Practice & Technology,
Год журнала:
2024,
Номер
19(5), С. 2010 - 2031
Опубликована: Май 1, 2024
ABSTRACT
Geo-electro
stratigraphic
assessments
of
aquifer
potentiality,
protectivity,
and
pliable
level
vulnerability
within
a
coastal
milieu
were
undertaken
with
geo-electrical
technology.
The
vertical
electrical
soundings
at
20
locations
the
2D
resistivity
tomography
surveys
five
study
area.
Results
obtained
from
these
coupled
hydro-geophysical
investigations
area
indicated
presence
four
geo-electric
layers:
motley
topsoil,
sandy
clay,
fine
sand,
coarse
sand.
geo-stratigraphic
data
assessed
groundwater
to
contamination
measures
transverse
resistance,
hydraulic
conductivity,
transmissivity,
diffusivity,
storativity,
longitudinal
conductance.
Geo-hydraulic
characterization
mean
554.6
Ωm,
conductivity
0.0004
S/m,
conductance
0.67
Ω−1,
resistance
5601.7
Ωm2,
3.5
m/day,
transmissivity
283
m2/day,
storativity
0.0002,
diffusivity
1
×
105
m2/day.
results
that
region's
potential
ranged
medium
high.
Longitudinal
values
protective
capacity
moderate
poor.
Geo-electrical
technology
was
therefore
found
be
an
effective
methodology
for
delineating
vulnerable
system.
Water Practice & Technology,
Год журнала:
2024,
Номер
19(5), С. 2108 - 2124
Опубликована: Май 1, 2024
ABSTRACT
Commercial
and
industrial
growth
in
cities
generates
hazardous
waste,
often
disposed
of
open
dump
sites,
contaminating
groundwater.
Understanding
pollutant
movement
numerical
models
are
crucial
for
effective
water
resource
management.
This
study
assessed
hydrogeological
dynamics
transfer
the
Enyimba
landfill
site,
Nigeria,
using
field
surveys
contaminant
modelling
to
understand
groundwater
quality
arsenic
contamination
spread.
The
research
technique
included
laboratory
experiments,
as
well
sampling
during
both
dry
wet
seasons,
evaluate
quality.
geochemical
examination
samples
revealed
amounts
several
metals
atomic
absorption
spectrophotometry.
used
transport
with
Visual
MODFLOW
Flex
6.1
MT3DMS
software
simulate
flow
solute
within
aquifer
layers.
Predictive
simulations
over
a
20-year
timeframe
demonstrated
progressive
spread
pollution
from
landfill,
resulting
an
ellipsoid-shaped
plume
stretching
its
source.
Arsenic
levels
have
gradually
increased,
posing
serious
threat
human
health.
highlights
need
remedial
measures
reduce
pollution,
including
waste
recovery
recycling
facilities
geo-membrane
use.
It
emphasizes
proactive
actions
protect
supplies
promote
environmental
sustainability
site.
Water Practice & Technology,
Год журнала:
2024,
Номер
19(8), С. 3373 - 3388
Опубликована: Июль 18, 2024
ABSTRACT
This
study
provides
a
comprehensive
analysis
of
aquifer
properties
using
vertical
electrical
sounding
(VES)
surveys
conducted
in
Eket,
Nigeria,
to
address
the
challenges
groundwater
management
coastal
areas.
The
VES
method
was
employed
for
hydrogeo-electrical
and
investigate
hydrogeological
dynamics
region.
results
reveal
varying
subsurface
layers
with
distinct
resistivity
values.
Spatial
distribution
indicates
densely
settled
areas
exhibit
lower
resistivities,
while
sparsely
regions
show
higher
resistivities.
spatial
location
labeled
EK2
features
largest
aquifer,
measuring
246.70
m,
predominantly
located
central
research
area.
Aquifer
depths
range
from
87.10
250.20
variations
thickness
highlighting
geographical
heterogeneity
its
impact
on
transport.
These
differences
characteristics
are
crucial
understanding
movement,
storage,
extraction
potential.
underscores
significant
variability
porosity,
reflecting
aquifers’
water
storage
capacity
susceptibility
contamination.
findings
have
important
implications
flow
rates
feasibility.
essential
data
investigations
resource
management,
emphasizing
intricate
relationship
among
geological
formations,
properties,
human
activities,
potential
risks
contamination
variable
porosity
zones.
Water Practice & Technology,
Год журнала:
2024,
Номер
19(10), С. 4282 - 4302
Опубликована: Окт. 1, 2024
ABSTRACT
This
study
explores
the
groundwater
potential
in
Aladja,
Udu,
Local
Government
Area
of
Delta
State,
Nigeria,
using
an
integrated
approach
combining
electrical
resistivity
techniques
with
Remote
Sensing
(RS)
and
Geographic
Information
System
(GIS)
methods.
The
primary
aim
is
to
delineate
aquifers
comprehensively
assess
resources.
Methods
include
Vertical
Electrical
Sounding
(VES)
gather
data,
RS
GIS
for
analyzing
geological
hydrological
parameters
such
as
lineament
density,
drainage
slope,
soil
type,
land
use.
values
ranged
from
147
460.50
Ωm,
aquifer
thicknesses
varying
between
6.50
36.30
m.
analysis
indicated
high
regions
characterized
by
significant
density
moderate
slopes.
highlights
complementarity
VES
RS/GIS
exploration,
revealing
substantial
resources
northwestern
area.
underscores
importance
integrating
these
methods
a
more
accurate
assessment
potential.
novelty
this
lies
validating
findings
ensuring
reliable
mapping
effective
resource
management.
methodology
offers
robust
framework
sustainable
management
similar
settings.
Water Practice & Technology,
Год журнала:
2024,
Номер
19(9), С. 3654 - 3675
Опубликована: Авг. 13, 2024
ABSTRACT
The
aim
of
this
research
was
the
application
geo-electrical
technology
in
determination
specific
retention,
yield,
and
storage-dependent
drainability
efficiency
within
a
major
coastal
milieu
Nigeria.
This
improves
on
past
work
where
expensive
time-intensive
pumping
tests
were
employed
to
determine
retention
yield.
In
addition
these
key
aquifer
geo-kinetic
properties,
other
important
characteristics
such
as
potentiality,
protectivity,
vulnerability
contamination
system
determined.
Geo-electrical
Wenner
Schlumberger
arrays
undertake
Vertical
Electrical
Soundings
(VES)
Resistivity
Tomography
(ERT)
surveys
results
obtained
constrained
by
ground
truth
from
lithological
logs.
Results
electrical
resistivity
indicated
that
strata
comprised
motley
topsoil,
coarse
sand,
fine
sandy
clay.
Measures
yield
generated
secondary
indices.
Specific
intersected
with
at
73%
(SDE),
indicating
percentage
must
be
exceeded
for
optimal
groundwater
extraction
rock
matrix's
pore
spaces
during
pumping.
Aquifer
transmissivity
measures
high
potentiality;
longitudinal
conductance
poor
protectivity
implying
increased
contamination.
