Korean Society of Hazard Mitigation,
Journal Year:
2024,
Volume and Issue:
24(5), P. 9 - 17
Published: Oct. 29, 2024
This
study
analyzed
the
impact
of
climate
adaptation
materials
on
mitigation
urban
heat
islands
(UHI)
using
digital
twin
visualization
and
computational
fluid
dynamics
(CFD)
technology.
The
effects
UHI
due
to
increased
impervious
surfaces
have
become
more
pronounced,
climate-adaptation
are
gaining
attention
as
potential
solutions.
In
this
study,
was
CFD
program
STAR-CCM+
based
finite
volume
method
(FVM).
selected
research
site
Byeoryang-dong,
Gwacheon
City,
four
simulation
scenarios
were
created
emissivity
values
asphalt
concrete
materials.
results
showed
that
application
decreased
surface
aboveground
(1.5
m)
temperatures
by
6.3
0.8
°C,
respectively.
suggests
can
significantly
mitigate
UHI.
ISPRS International Journal of Geo-Information,
Journal Year:
2025,
Volume and Issue:
14(2), P. 57 - 57
Published: Feb. 1, 2025
In
the
last
two
decades,
South
Korea
has
seen
an
increase
in
extreme
rainfall
coinciding
with
proliferation
of
impermeable
surfaces
due
to
urban
development.
When
underground
drainage
systems
are
overwhelmed,
pluvial
flooding
can
occur.
Therefore,
recognizing
as
key
flood-conditioning
factors
is
vital
for
identifying
flood-prone
areas
and
developing
predictive
models
highly
urbanized
regions.
This
study
evaluates
maps
flood
susceptibility
Seoul,
using
machine
learning
techniques
such
logistic
regression
(LR),
random
forest
(RF),
support
vector
machines
(SVM),
integrating
traditional
conditioning
drainage-related
data.
Together
known
points
from
2010
2022,
sixteen
were
selected,
including
parameters
sewer
pipe
density
(SPD)
distance
a
storm
drain
(DSD).
The
RF
model
performed
best
(accuracy:
0.837,
area
under
receiver
operating
characteristic
curve
(AUC):
0.902),
indicated
that
32.65%
high
flooding.
accuracy
AUC
improved
by
7.58%
3.80%,
respectively,
after
variables
model.
research
provides
valuable
insights
management,
highlighting
primary
causes
Seoul
heightened
susceptibility,
particularly
relating
infrastructure.
Water,
Journal Year:
2024,
Volume and Issue:
16(17), P. 2429 - 2429
Published: Aug. 28, 2024
With
urban
expansion,
traditional
drainage
systems
in
densely
populated
cities
face
significant
challenges,
leading
to
frequent
flooding
and
pollution
issues.
Deep
tunnel
emerge
as
an
innovative
approach,
offering
underground
storage
for
excess
precipitation
alleviating
inundation.
This
research
investigates
the
deployment
of
a
deep
system
Guangzhou’s
core.
By
integrating
with
existing
networks,
this
aims
curtail
over-flow
contamination
boost
sewage-handling
capacity.
Successful
implementation
hinges
on
thorough
evaluation
synchronization
broader
development
objectives.
In
Guangzhou,
where
methods
fall
short,
tunnels
present
viable
option.
study
explores
techniques
identifying
deficiencies,
devising
enhancements,
refining
citywide
strategies.
Economic
analysis
indicates
that
are
more
cost-effective
than
conventional
upgrades,
long-term
benefits
land
conservation
efficiency.
Following
implementation,
these
markedly
enhance
sewage
management,
diminish
overflow
incidents,
improve
mitigation.
Although
initial
investments
substantial,
enduring
advantages
preservation
efficiency
significant.
Thus,
practical
flood
control
solution
high-density
areas
like
fostering
sustainable
metropolitan
growth.
Physics of Fluids,
Journal Year:
2024,
Volume and Issue:
36(11)
Published: Nov. 1, 2024
Deep
tunnel
systems
are
characterized
by
large
burial
depths,
long
distances,
and
free-surface
pressurized
flows,
operating
under
complex
inflow
conditions
that
can
lead
to
strong
pressure
oscillations,
particularly
in
the
transitions
between
main
shafts.
This
paper
focuses
on
deep
system
Shanghai,
China.
A
physical
model
was
established
based
gravity
similarity,
a
corresponding
one-dimensional
mathematical
for
flows
established.
The
entire
process
of
water
observed
experiment,
several
conditions,
including
different
discharge
schemes,
were
conducted
analyze
maximum
at
junction
shaft
tunnel,
as
well
along
tunnel.
deviation
degree
introduced
validate
reliability
numerical
model.
impact
distribution
studied
with
simulation.
results
indicated
simultaneous
from
both
shafts
leads
more
pronounced
phase
difference.
downstream
after
stabilization
higher
than
upstream.
Simulations
variations
same
scenarios
revealed
symmetric
midpoint
front
shaft.
Asymmetric
only
creates
localized
high
shaft,
producing
greater
overall.
When
upslope
exceeds
downslope
inflow,
it
also
reduce
within
pipeline.
difference
sides,
smaller
pressure.
