Micro-macro–scale flood modeling in ungauged channels: Rain-on-grid approach for improving prediction accuracy with varied resolution datasets
Journal of Hydrology,
Год журнала:
2025,
Номер
unknown, С. 132862 - 132862
Опубликована: Фев. 1, 2025
Язык: Английский
The Impact of Temporal Rainfall Pattern Uncertainties on Water Quantity and Sediment Transportation Results of an Integrated Flood Simulator
Water Resources Management,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 27, 2025
Язык: Английский
Flood Mitigation and Water Resource Preservation: Hydrodynamic and SWMM Simulations of nature-based Solutions under Climate Change
Water Resources Management,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 18, 2024
Язык: Английский
Assessment of the influence of DTM quality on dam rupture simulation processes
MOJ Ecology & Environmental Sciences,
Год журнала:
2024,
Номер
9(2), С. 61 - 70
Опубликована: Апрель 5, 2024
Computer
programs
applied
to
disaster
simulation
are
widely
used
and
widespread
today,
taking
as
input
various
data
types,
from
specific
the
application
area
DTMs
(Digital
Terrain
Models).
This
need
for
and,
in
particular,
related
relief
is
very
relevant
prediction
procedures
forecasting
catastrophes,
such
failure
of
tailings
mining
deposit
dams.
Therefore,
it
fundamental
importance
know
quantify
quality
this
question,
order
effectively
serve
application.
To
end,
research,
several
tests
were
carried
out,
using
a
reference
best
results
those
obtained
with
introduction
DTM
LIDAR
(Light
Detection
Ranging)
flight
survey,
being
one
primary
into
HEC-RAS
(Hydrologic
Engineering
Center-River
Analysis
System).
Subsequently,
these
same
had
their
spatial
resolution
degraded,
that
is,
pixel
size
increased,
generating
models
worse
new
inputs
obtaining
dam
failures.
The
test
B1
Dam,
located
Brumadinho-MG,
Brazil,
was
laboratory,
where
biggest
disasters
world
recently
occurred
which,
there
real
affected
by
collapse.
demonstrated
use
an
at
least
2.5
meters
or
better,
class
A
cartographic
compatible
most
recent
Brazilian
standard,
would
guarantee
reliable
results.
Язык: Английский
Enhancing flood forecasting accuracy in Data-Scarce regions through advanced modeling approaches
Journal of Hydrology,
Год журнала:
2024,
Номер
645, С. 132283 - 132283
Опубликована: Ноя. 10, 2024
Язык: Английский
Predicting possible bank erosion and bed incision in Zhengzhou Reach of Yellow River with hydrodynamic modeling
Journal of Water and Climate Change,
Год журнала:
2024,
Номер
16(1), С. 92 - 111
Опубликована: Окт. 24, 2024
ABSTRACT
The
Zhengzhou
Reach
of
the
Yellow
River
(YR)
frequently
undergoes
significant
channel
changes
during
flooding,
leading
to
bank
erosion,
deposition,
and
bed
incision.
These
result
in
adverse
impacts
such
as
land
loss,
movement,
overbank
flooding.
This
study
proposes
a
two-dimensional
hydrodynamic
model
combined
with
rough
set
theory
(RST)
simulate
these
phenomena
alluvial
YR.
was
calibrated
validated
using
data
from
2006
2018.
Results
demonstrate
that
accurately
predicts
erosion
incision,
predicted
widths
closely
matching
measured
data.
mean
error
14
m
18
most
severe
observed
78
downstream
Huayuankou,
river
incised
by
3.7–4.9
along
right
bank.
Based
on
RST,
shear
stress,
velocity,
width/depth
ratio,
gradient,
suspended
sediment,
load
are
dominating
factors
affect
channel-shape
changes.
findings
will
aid
implementing
river-engineering
strategies
provide
guidance
for
managing
similar
reaches.
research
highlights
effectiveness
coupled
predicting
morphological
systems,
thereby
contributing
better
flood
management
protection
strategies.
Язык: Английский
The Impact of a Clay-Core Embankment Dam Break on the Flood Wave Characteristics
Hydrology,
Год журнала:
2025,
Номер
12(3), С. 56 - 56
Опубликована: Март 10, 2025
Flood
hazard
studies
for
dam
break
cases
are
of
utmost
importance
understanding
potential
risks
and
minimizing
the
impact
such
accidents.
Siriu
Dam,
which
has
a
clay
core,
is
ranked
as
third
highest
embankment
in
Romania.
A
fully
dynamic
2D
hydraulic
numerical
model
was
developed
using
HEC-RAS
software
to
simulate
routing
flood
waves
formed
by
breaching
this
dam.
Four
different
failure
scenarios
were
considered:
two
overtopping
piping.
The
breach
parameters
chosen
based
on
characteristics
accordance
with
appropriate
empirical
relationships.
quantified
analyzed
terms
depths,
velocities,
depth
x
velocity
values,
flooded
areas.
results
provide
useful
information
concerning
risk
mitigation,
wave
routing,
peak
discharges,
arrival
time,
travel
velocity,
inundation
boundary.
influence
scenario
site
(topography,
river
morphology,
constructions)
analyzed.
Depths
velocities
over
10
m
15
m/s,
respectively,
obtained
close
dam,
while
those
Buzău
City
(90
km
away)
under
1
2
respectively.
city
7–8.5
h
after
(depending
scenario),
50%
its
total
area
affected.
Moreover,
compared
scenarios,
providing
practical
details
necessary
develop
management
plans
associated
response
measures
inhabited
This
first
study
accident
that
can
occur
Язык: Английский
Optimizing Hydraulic Performance and Sustainability of the Simike-Nzovwe Roadside Drainage System in Mbeya City, Tanzania Using HEC-RAS Modeling
Research Square (Research Square),
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 2, 2025
Abstract
The
side
drainage
system
along
the
TANZAM
Highway
section
from
Simike
to
Nzovwe
River,
extending
approximately
1.85
km
and
featuring
five
circular
culverts,
was
evaluated
assess
its
hydraulic
performance
behaviour
during
rainfall
events.
Using
HEC-RAS
model,
study
analysed
flow
regimes,
specific
energy
transitions,
sediment
transport
identify
design
inefficiencies
propose
optimization
strategies.
model
effectively
captured
key
processes,
revealing
significant
silt
accumulation
upstream
of
culverts
due
subcritical
(Fr
<
1)
erosion
risks
in
steeper
sections
with
supercritical
>
1).
Hydraulic
jumps
observed
near
caused
turbulence,
localized
erosion,
debris
deposition,
velocities
decreasing
7
m/s
less
than
1
transitions.
Sensitivity
analysis
demonstrated
that
Manning’s
roughness
coefficient,
channel
slope,
culvert
dimensions
significantly
influence
behaviour,
accumulation,
patterns.
Based
on
these
findings,
recommends
optimizing
geometry
by
reducing
slopes,
steepening
longitudinal
enlarging
enhance
efficiency
minimize
deposition.
Material
selection,
such
as
riprap
for
high-velocity
zones
vegetative
linings
low-velocity
sections,
is
proposed
improve
resistance
promote
ecological
stability.
Additionally,
traps
sustainable
practices
are
suggested
mitigate
sedimentation
reduce
maintenance
demands.
This
highlights
value
one-dimensional
models
like
designing
maintaining
efficient
roadside
systems,
providing
actionable
recommendations
performance,
costs,
ensure
environmental
sustainability
similar
contexts..
Язык: Английский
Comparing SWMM and HEC-RAS Hydrological Modeling Performance in Semi-Urbanized Watershed
Water,
Год журнала:
2025,
Номер
17(9), С. 1331 - 1331
Опубликована: Апрель 29, 2025
One
of
the
most
common
applications
hydrological
models
is
in
studying
urban
watersheds,
with
distributed
and
semi-distributed
being
used
more
frequently.
The
choice
modeling
tools
selection
processes
to
represent
dependent
on
objectives,
available
resources,
scale
study.
Certain
setup
parameters
can
have
important
effects
model
accuracy,
such
as
representation
aquifer
components,
detailed
surface
storage,
discretization,
among
others.
these
are
often
unknown
since
studies
do
not
systematically
alter
nor
consider
different
tools.
This
study
performs
a
comparative
analysis
between
SWMM
HEC-RAS
describing
response
semi-urbanized
headwater
watershed
Alabama.
Within
each
model,
were
varied
accuracy
assessed
stream
depth
velocity
collected
field.
results
showed
that
impactful
existence
an
component
well
careful
storage.
Conversely,
comparable
when
was
present,
but
runoff
highly
overpredicted
infiltration
considered.
These
indicate
limitations
rain-on-grid
neglect
interactions
shallow
groundwater.
Язык: Английский
Assessment of Flood Hazard Mapping Using a DEM-Based Approach and 2D Hydrodynamic Modeling
Water,
Год журнала:
2024,
Номер
16(13), С. 1844 - 1844
Опубликована: Июнь 28, 2024
DEM-based
approaches
for
assessing
flood-prone
areas
have
recently
gained
extensive
attention
due
to
their
parsimony
and
cost-effectiveness.
This
work
aims
test
the
capability
of
Geomorphic
Flood
Index
(GFI)
delineate
results
performances
while
downscaling
calibration
map.
The
accuracy
was
tested
by
examining
sensitivity
exponent
power
function
linking
flow
depth
in
river
network
upslope
contributing
area.
Two
were
selected:
first
consisted
calibrating
GFI
using
a
flood
map
generated
through
2D-SWE
hydrodynamic
model.
second
correlating
water
depths
with
corresponding
areas.
geomorphological
model
is
able
effectively
susceptibility
which,
although
on
average
larger
than
that
obtained
model,
provide
good
starting
point
any
subsequent
in-depth
analysis.
After
calibration,
an
Objective
Function
0.21
Area
Under
ROC
Curve
AUC
=
92%,
which
among
highest
if
compared
other
cases
literature,
obtained.
Positive
feedback
also
covers
only
rather
limited
portion
basin.
However,
small
values
scaling
after
method
indicate
substantial
independence
from
leads
belief
simple
not
particularly
suitable
describing
relationships
between
these
two
variables.
Язык: Английский