IOP Conference Series Earth and Environmental Science,
Journal Year:
2024,
Volume and Issue:
1414(1), P. 012045 - 012045
Published: Dec. 1, 2024
Abstract
Flooding
is
a
hydro-meteorological
disaster
that
can
have
an
impact
not
only
on
economic
losses
but
also
threatens
human
life.
the
event
of
overflowing
water
in
potential
areas
due
to
exceeding
river’s
capacity,
which
be
predicted
by
using
flood
inundation
modeling.
Flood
modeling
could
first
step
reduce
caused
disasters.
Rainfall
data
from
5
rain
gauge
stations
over
15
years
provides
spatial
and
temporal
distribution
used
as
inputs
This
study
aims
investigate
performance
derive
hazard
zonation
combining
depth
velocity
through
hydraulic
GIS.
The
results
show
accuracy
model
based
RMSE
MAE
calculation
2.56
m
2.19
m.
addittion
validation
46.60%.
Although
for
flooding
differences
considered,
this
analysis
essential
understanding
planning
management
area,
particularly
risk
mitigation
hydrological
infrastructure
planning.
Forum Geografi,
Journal Year:
2024,
Volume and Issue:
38(1)
Published: March 16, 2024
Topographic
conditions
represented
by
the
Digital
Elevation
Model
(DEM)
are
essential
in
flood
inundation
models.
The
DEM
which
is
categorised
as
a
Surface
(DSM)
stores
height
information,
be-sides
ground
and
non-ground
elevation
required
for
preprocessing
before
being
employed
hydrologic
applications,
particularly
relation
to
modelling
removing
along
plain
river
channels.
improvement
accuracy
of
crucial
reduc-ing
impact
disasters.
This
study
aims
compare
level
based
on
Ter-raSAR-X
data
with
filtering
process
using
slope-based
combining
cross-sectional
profile
from
field
measurement
filtered
DEM.
result
confirms
that
product
improved
via
remove
elevations
significant
means
fused
information
results
adding
could
provide
representation
closer
measure-ments
within
Mean
Absolute
Error
2.51
m,
2.72
m
1.91
left
overbank,
right
overbank
centre
river,
respectively.
performance
2-dimensional
hydrody-namic
HEC-RAS
derived
filtering,
after
addition
show
increasing
depth
at
each
stage
processing.
There
an
approximately
11.67%
DEM,
besides
in-crease
24.98%
utilising
added
channel
information.
Abstract
Expectations
for
a
change
in
precipitation
patterns
due
to
climate
effects
make
floods
one
of
the
main
concerns
water
authorities.
The
minimization
negative
particular
region
depends
on
success
hydrologic
and
hydrodynamic
modeling
approaches.
In
this
study,
abilities
two
most
popular
flood
software,
namely,
HEC-RAS
MIKE+,
were
used
Hron
River
Slovakia.
For
purposes,
various
discharge
values
from
year
hundred
years
peak
considered.
vulnerability
catchment
each
period
was
modeled
visualized
using
both
software.
MIKE
+
outputs
showed
that
study
area
is
vulnerable
high-frequency
values.
2D
approaches
found
be
close
other
flow
conditions.
comparisons
dimensions
given
are
only
sufficient
transfer
one-year
value
safely.
models
exhibited
not
safe
case
ten-year
risk
getting
highest
level
hundred-year
discharge.
Due
models’
findings,
it
seen
flood,
three
different
mitigation
scenarios
proposed
analyzed
including
river
bed
rise
levee
right
left
bank
protect
risks.
After
applying
these
scenarios,
whole
around
length
five
kilometers
protected
measures
can
have
significant
saving
lives
protecting
properties,
industrial
areas
agricultural
lands.
H2Open Journal,
Journal Year:
2025,
Volume and Issue:
8(3), P. 139 - 156
Published: April 18, 2025
ABSTRACT
This
study
examines
the
risks,
vulnerability,
and
potential
impacts
of
dam
breaches,
focusing
on
Dhap
Nagmati
dams
in
Kathmandu,
Nepal.
These
are
constructed
to
enhance
river
flow,
but
pose
a
risk
breaching,
potentially
causing
severe
damage,
loss
life,
inundation
UNESCO
World
Heritage
Sites.
Despite
these
consequences,
have
not
been
comprehensively
investigated
no
detailed
scientific
analysis
has
conducted.
aimed
assess
effect
breaches
under
overtopping
mode
failure
prepare
flood
hazard
vulnerability
maps.
The
employs
Hydrologic
Engineering
Center-River
Analysis
System
simulate
unsteady
flow
corresponding
probable
maximum
flood,
with
mapping
based
general
curves
guidelines.
results
show
peak
discharges
27,835
1,064
m³/s
velocities
27.2
7.27
m/s
for
respectively.
Sites
fall
H6
H5
zones
after
breach,
breach
height
being
most
sensitive
parameter.
finding
highlights
impact
breaching
helps
land
use
planning,
emergency
response,
mitigation
reduce
life
property.
