Applied Sciences,
Journal Year:
2024,
Volume and Issue:
14(17), P. 7560 - 7560
Published: Aug. 27, 2024
The
dry
beach
length
determines
the
hydraulic
boundary
of
tailings
impoundments
and
significantly
impacts
infiltration
line,
which
is
crucial
for
dam.
A
deep
learning
method
utilizing
satellite
images
presented
to
recognize
area
accurately
measure
beaches
in
tailing
ponds.
Firstly,
various
ponds
were
gathered
collection
was
enlarged
create
a
dataset
Then,
created
using
YOLOv5-seg
identify
from
images.
mask
region
segmented
contour
extraction
then
carried
out.
Finally,
crest
line
fitted
based
on
extracted
contour.
pixel
distance
between
measured
translated
into
real
by
ground
resolution.
This
paper’s
case
study
compared
calculated
with
obtained
field
monitoring.
results
showed
that
minimum
error
2.10%,
maximum
3.46%,
average
2.70%,
indicating
high
precision
calculating
Case Studies in Chemical and Environmental Engineering,
Journal Year:
2024,
Volume and Issue:
9, P. 100690 - 100690
Published: March 13, 2024
The
deposits
of
mine
tailings
can
be
a
source
groundwater
contamination
by
metals.
In
this
study,
we
simulated
the
concentrations
iron,
manganese
and
aluminum
in
potentially
affected
drainage
from
located
Brumadinho
(Brazil).
aim
was
to
verify
whether
observed
region
attributed
these
drainages.
simulation
used
FREEWAT
graphical
interface,
which
incorporates
MODFLOW
model,
hydraulic
properties
existing
unconfined
confined
aquifers,
spatial
distribution
tailings'
deposits,
dissolved
iron
measured
drilled
wells.
period
20
years,
starting
2019
after
collapse
B1
dam
Córrego
do
Feijão
Vale,
S.A.
modeling
results
revealed
plumes
metal
progressively
less
dispersed
over
time,
aquifer,
increased
aquifer.
both
aquifers
were
generally
lower
than
legal
limits
imposed
for
human
consumption,
although
some
areas
vicinity
had
higher
those
limits,
especially
widened
time.
most
relevant
result
revelation
that
contribution
wells
might
have
not
exceeded
1%.
This
is
important
management
standpoint,
because
monitoring
anthropogenic
cases
(where
rock
weathering
dominates
chemistry)
becomes
more
challenging.
Case Studies in Chemical and Environmental Engineering,
Journal Year:
2024,
Volume and Issue:
9, P. 100701 - 100701
Published: March 26, 2024
The
Soil
and
Water
Assessment
Tool
(SWAT)
was
used
to
assess
total
phosphorus
concentrations
(TOT-P)
fluxes
(TOT_P)
in
the
Paraopeba
River
basin,
located
state
of
Minas
Gerais,
Brazil,
following
collapse
tailings
dam
B1
Brumadinho.
model
calibrated
validated
for
periods
before
(2000–2018)
after
(2019–2021)
Brumadinho
25
January
2019,
with
great
accuracy
measured
by
various
performance
indicators
(e.g.,
R2
≈
0.8).
flow
phosphorus-containing
sludge
from
iron-ore
explored
Córrego
do
Feijão
Mine
Vale,
SA,
released
break
has
impacted
water
through
large
increments
TOT-P
near
site
(60–100%,
pre-rupture
values
varying
between
0.06
0.1
mg/L).
But
other
major
sources
were
flagged,
namely
urban
Betim
region
that
raised
0.9
mg/L
periodically
during
entire
simulation
period.
study
also
revealed
controls
concentration
coverage
forests
lowered
down
at
0.5–0.8
μg/L.km2.
lowering
rate
was,
however,
dependent
on
occupation
argisols.
As
per
results,
larger
percentage
argisols
a
will
be
surrounding
courses,
meaning
are
prone
erosion
leaching.
A
cluster
analysis
input
terrain
slope,
soil
type)
output
runoff)
variables
SWAT
allowed
relating
surface-
TOT_P
underground-dominant
hydrological
processes,
respectively
runoff
groundwater
flow,
linking
them
specific
environmental
such
as
steep
slopes
first
case
latosols
smooth
landscapes
second
case.
management
implications
retrieved
this
holistic
assessment
discussed.
Finally,
checked
against
Brazilian
standards.
In
regard,
compared
limits
established
Resolution
454/2012
National
Environmental
Council
–
CONAMA.
Some
sub-basins
exhibited
levels
above
legal
threshold,
contamination
viewed
systemic
requiring
immediate
action
implementation
sewage
treatment
best
practices
agriculture),
well
monitoring
spatial
temporal
frames.
existence
extreme
rainfall
events
basin
main
cause
inaccuracies,
overestimated
TOT-P.
