Water Practice & Technology,
Год журнала:
2024,
Номер
19(8), С. 3350 - 3372
Опубликована: Авг. 1, 2024
ABSTRACT
There
are
growing
worries
regarding
sufficient
supplies
of
safe
water
in
Obot
Akara
and
Ikot
Ekpene
Local
Government
Areas
Akwa
Ibom
State.
Thus,
this
study
aims
to
investigate
aquifer
storage
properties
contamination
risk
potential
using
electrical
resistivity
techniques
the
two
counties.
The
counties
shown
comprise
3–4
lithological
successions
sandy
gravelly
layers
with
slight
clay
intercalations.
Groundwater
abstraction
takes
place
third
fourth
area
at
depths
between
5.4
121.4
m.
results
demonstrate
that
aquifer's
prolificacy
requires
a
specific
yield
larger
than
0.15
or
retention
less
0.15.
94%
region
is
revealed
have
good
groundwater
for
sustainability
boreholes.
Furthermore,
show
87.5%
has
weak/poor
protection
while
12.5%
moderate
against
infiltrating
contaminants.
In
terms
susceptibility
rating,
21.9%
rating
remaining
78.1%
low
rating.
identified
areas
adjudged
moderate/high
potential.
These
findings
provide
valuable
guidelines
formulating
sustainable
utilization
management
strategies
area.
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.
Results in Earth Sciences,
Год журнала:
2024,
Номер
2, С. 100022 - 100022
Опубликована: Апрель 4, 2024
Leachate
contamination
was
investigated
with
geo-electrical
methodologies
at
a
major
open
dump
in
Eket,
Southern
Nigeria.
The
is
heavily
polluted,
degrades
the
environment,
and
has
released
toxins
into
atmosphere.
To
model
leachate
percolation,
vertical
electrical
soundings
(VES)
resistivity
tomography
(ERT)
surveys,
constrained
by
well
lithological
information,
were
undertaken
site.
field
equipment
used
for
investigations
ABEM
Terrameter
SAS
1000
its
accessories.
WINRESIST
software
employed
to
process
sounding
data
RES2DINV
generate
2D
tomograms
indicating
subsurface
heterogeneity.
Results
obtained
from
showed
that
had
three
units
(motley
topsoil,
fine
sand
coarse
sand),
being
main
hydrogeological
unit
comprising
water-bearing
formations.
first
layer's
ranged
84.9
–
625.4
Ωm
mean
of
360.4
Ωm;
second
7.5
1008.1
142.9
Ωm,
third
values
11.6
745.6
205.5
Ωm.
indicated
percolated
groundwater
resources.
This
concerning
as
water
resource
within
area.
Measures
Dar-Zarrouk
indices
reflection
co-efficient
highly
heterogenous
region
moderate
aquifer
protective
capacity
potentiality.
mitigate
site,
sanitary
landfills,
phyto-remediation,
impermeable
liners,
or
earth
materials
should
be
diminish
rate
percolation.
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.
Results in Earth Sciences,
Год журнала:
2024,
Номер
2, С. 100033 - 100033
Опубликована: Июль 9, 2024
Determining
the
degree
of
an
aquifer's
susceptibility
to
pollutants
is
important
tool
for
policy
planning
in
subterranean
water
administration
and
conservation.
In
this
work,
vulnerability
was
appraised
with
use
DRASTIC
methodology,
which
employs
seven
parameters:
depth
groundwater
(D);
net
recharge
(R);
aquifer
media
(A);
soil
(S);
topography
(T);
influence
vadose
zone
(I);
hydraulic
conductivity
(C).
Different
ratings
were
given
each
parameter
based
on
hydro-geological
geo-electrical
information
obtained
from
study
area.
Geo-electrostratigraphic
data
acquired
vertical
electrical
soundings
resistivity
tomography
surveys.
The
results
demonstrated
existence
geoelectrical
layers
variable
resistivities
ranging
high
low,
curve
types.
Longitudinal
conductance
measures
indicated
moderate
protective
capacity.
Analysis
indices
showed
that
contamination.
Vulnerability
maps
generated
indicate
locations
vulnerability,
goal
being
prevent
indiscriminate
haphazard
wildcat
abstraction
such
locations.
quality
category
index
(QCI)
model
underground
susceptivity
dependent
all
7
parameters
employed
model,
most
critical
determinants
(D),
(R),
(A),
impact
(I).
work
recommends
anthropogenic
activities
could
contaminate
resource
be
halted
as
by
models
vulnerable.
Solid Earth Sciences,
Год журнала:
2024,
Номер
9(3), С. 100191 - 100191
Опубликована: Июль 30, 2024
Litho-stratigraphic
characterization
within
hydrogeological
units
of
a
major
aquifer
system
in
Southern
Nigeria
was
carried
out
using
Electrical
Resistivity
(ER),
Stratigraphic
Modified
Lorenz
Plots
(SMLP),
and
Flow
Zone
Indicator
(FZI)
algorithms.
The
aim
integrating
these
technologies
to
generate
hydraulic
flow
(HFU)
that
would
describe
the
speed
efficiency
aquifer's
stratigraphic
units.
technology
delineated
four
geoelectric
layers
study
area:
motley
topsoil,
coarse
sand,
fine
sandy
clay,
with
aquiferous
formation
being
third
layer.
Via
measures
obtained
from
geo-electrical
data,
geo-hydraulic
parameters
were
estimated.
conductivity
ranged
3.1
x
10−5
9.3
m/s,
effective
porosity
0.33
0.54,
permeability
4362.9
13143.4
mD,
tortuosity
0.85
0.97,
Aquifer
Quality
Index
(AQI)
values
3.57
4.88
4.11
7.00.
presence
three
region.
first
zone
superconductor
good
ranking;
second
zones
conductors
having
fair
rankings.
Results
employed
Discrete
Rock
Typing
(DRT)
results
which
indicated
two
distinct
rock
matrix
types.
Dykstra-Parson
co-efficient,
evaluation
heterogeneity,
gave
value
unity,
indicating
perfect
heterogeneity
aquifer.
