Geophysical Research Letters,
Journal Year:
2024,
Volume and Issue:
51(2)
Published: Jan. 21, 2024
Abstract
The
placement
of
wood
in
rivers
is
a
common
restoration
method
used
to
locally
affect
hydraulic
and
morphologic
conditions
create
habitat.
Laboratory
experiments
demonstrated
that
placements
can
also
promote
surface
declogging,
is,
removal
fine
sediment
from
gravel
bed,
thereby
restoring
spawning
grounds
for
fish.
Logs
different
size
submergence
level
were
placed
on
bed
clogged
with
fines.
Surface
declogging
was
observed
regions
elevated
turbulence
the
log
wake
velocity
adjacent
log.
A
criteria
identified
based
modified
non‐dimensional
Shields
parameter
combining
mean
turbulent
at
bed.
footprint
declogged
scaled
dimensions.
Emergent
logs
produced
larger
compared
submerged
same
length,
due
their
stronger
influence
flow
field.
shown
prevent
clogging
over
similar
areas.
Geophysical Research Letters,
Journal Year:
2024,
Volume and Issue:
51(12)
Published: June 14, 2024
Abstract
Bedload
sediment
transport
plays
an
important
role
in
the
evolution
of
rivers,
marshes
and
deltas.
In
these
aquatic
environments,
vegetation
is
widespread,
plant
species
have
unique
morphology.
However,
impact
real
morphology
on
flow
has
not
been
quantified.
This
study
used
model
plants
with
morphology,
based
Phragmites
australis
,
Acorus
calamus
Typha
latifolia
.
The
frontal
area
increases
away
from
bed,
which
leads
to
higher
near‐bed
velocity
than
would
be
predicted
depth‐average
area.
A
coefficient
was
defined
quantify
vertically‐varied
Laboratory
experiments
confirmed
that
improved
prediction
velocity,
turbulent
kinetic
energy
bedload
rate
canopies
realistic
Plant
can
alter
rates
by
up
order
magnitude,
relative
assumption
uniform
Annals of the New York Academy of Sciences,
Journal Year:
2017,
Volume and Issue:
1399(1), P. 5 - 26
Published: March 30, 2017
Interest
in
the
role
that
ecosystems
play
reducing
impacts
of
coastal
hazards
has
grown
dramatically.
Yet
magnitude
and
nature
their
effects
are
highly
context
dependent,
making
it
difficult
to
know
under
what
conditions
habitats,
such
as
saltmarshes,
reefs,
forests,
likely
be
effective
for
saving
lives
protecting
property.
We
operationalize
concept
natural
nature‐based
solutions
protection
by
adopting
an
ecosystem
services
framework
propagates
outcome
a
management
action
through
societal
benefits.
review
literature
on
basis
steps
this
framework,
considering
not
only
supply
provided
but
also
demand
protective
from
beneficiaries.
recommend
further
attention
(1)
biophysical
processes
beyond
wave
attenuation,
(2)
combined
multiple
habitat
types
(e.g.,
vegetation),
(3)
marginal
values
expected
damage
functions,
and,
particular,
(4)
community
dependence
co‐benefits.
apply
our
approach
two
case
studies
illustrate
how
estimates
benefits
losses
can
inform
restoration
development
decisions.
Finally,
we
discuss
frontiers
linking
social,
ecological,
physical
science
advance
protection.
Journal of Geophysical Research Earth Surface,
Journal Year:
2018,
Volume and Issue:
123(5), P. 891 - 904
Published: April 6, 2018
A
series
of
laboratory
experiments
was
conducted
using
arrays
rigid
cylinders
in
a
sandy
bed
as
proxy
for
mangrove
roots
and
benthos.
Synchronous
colocated
measurements
velocity
suspended
sediment
concentration
were
recorded
within
the
array
to
investigate
effect
density
on
resuspension
under
different
wave
conditions.
The
measured
increase
turbulent
kinetic
energy
resulting
from
flow‐vegetation
interactions
is
directly
linked
observed
resuspension.
observations
emphasize
role
generated
by
interactions,
rather
than
shear
stress
mean
velocity,
main
driver
array.
We
test
modified
Shields
parameter
analysis,
well
analytical
predictions
previously
developed
unidirectional
currents,
which
accurately
predict
thresholds
oscillatory
flow
Water Resources Research,
Journal Year:
2019,
Volume and Issue:
55(7), P. 6109 - 6124
Published: July 1, 2019
Abstract
The
impacts
of
aquatic
vegetation
on
bed
load
transport
rate
and
bedform
characteristics
were
quantified
using
flume
measurements
with
model
emergent
vegetation.
First,
a
for
predicting
the
turbulent
kinetic
energy,
k
t
,
in
vegetated
channels
from
channel
average
velocity
U
volume
fraction
ϕ
was
validated
mobile
sediment
beds.
Second,
data
several
studies,
predicted
shown
to
be
good
predictor
rate,
Q
s
allowing
channels.
control
by
explained
statistics
individual
grain
motion
recorded
camera,
which
showed
that
number
grains
per
area
correlated
.
Third,
ripples
observed
characterized
without
For
low
solid
(
≤
0.012),
ripple
wavelength
constrained
stem
spacing.
However,
at
higher
=0.025),
distinct
not
observed,
suggesting
transition
sheet
flow,
is
over
plane
formation
bedforms.
flux
carried
migrating
decreased
increasing
again
facilitated
flow.
Water Resources Research,
Journal Year:
2021,
Volume and Issue:
57(3)
Published: Feb. 17, 2021
Abstract
Laboratory
experiments
examined
the
impact
of
model
vegetation
on
turbulence
and
resuspension.
The
turbulent
kinetic
energy
increased
with
increasing
velocity
solid
volume
fraction,
but
did
not
depend
stem
diameter.
vegetation‐generated
dominated
total
inside
canopies.
For
same
sediment
size,
critical
at
which
resuspension
was
initiated
for
both
vegetated
bare
beds,
resulted
in
a
that
decreased
fraction.
Both
had
no
dependence
However,
denser
canopies
and/or
canopy
smaller
greater
slope
is
required
to
initiate
This
study
provides
way
predict
onset
regions
vegetation,
an
important
threshold
transport
landscape
evolution.
River Research and Applications,
Journal Year:
2024,
Volume and Issue:
40(6), P. 887 - 942
Published: April 4, 2024
Abstract
In
this
article,
we
track
the
evolution
of
fluvial
biogeomorphology
from
middle
20th
century
to
present.
We
consider
emergence
as
an
interdisciplinary
research
area
that
integrates
knowledge
drawn
primarily
geomorphology
and
plant
ecology,
but
with
inputs
hydrology
landscape
ecology.
start
by
assembling
evidence
for
field
a
keyword
search
Web
Science
detailed
analysis
papers
published
in
two
scientific
journals:
journal—Earth
Surface
Processes
Landforms;
multidisciplinary
river
science
journal—River
Research
Applications.
Based
on
evidence,
identify
three
distinct
time
periods
development
biogeomorphology:
‘early
years’
before
1990;
transitional
decade
1990s;
period
rapid
expansion
diversification
themes,
methods
investigation
scales
since
2000.
Because
literature
is
vast,
can
only
summarize
developments
each
these
periods,
refer
recent
in‐depth
reviews
conceptual
perspectives
relevant
topics.
Thus,
rather
than
full
deep
review,
present
annotated
bibliographic
overview
biogeomorphology,
whereby
text
describes
broad
trends
supported
tables
citations
deliver
greater
detail.
end
brief
consideration
likely
future
developments.
Journal of Fluid Mechanics,
Journal Year:
2025,
Volume and Issue:
1006
Published: March 7, 2025
This
study
investigates
how
the
spatial
configuration
of
submerged
three-dimensional
patches
vegetation
impacts
turbulence.
Laboratory
experiments
were
conducted
in
a
channel
with
model
configured
different
patch
area
densities
(
$\phi
_{p}$
),
representing
bed
fraction
occupied
by
patches,
ranging
from
0.13
to
0.78,
and
patterns
transitioning
two
dimensional
(channel-spanning
patches)
three
(laterally
unconfined
patches).
These
configurations
produced
range
flow
regimes
within
canopy,
wake
interference
skimming
flow.
At
low
density
_{p}\lt0.5$
turbulence
canopy
increased
increasing
regardless
configuration,
while
at
high
_{p}\gt0.5$
relationship
between
depended
on
patches.
For
same
density,
smaller
lateral
gaps
generated
stronger
canopy.
The
relative
contributions
shear
production
also
varied
densities,
dominated
over
production,
was
more
dominant
due
an
enhanced
layer
top
reduced
mean
velocity
A
new
predictive
for
channel-averaged
turbulent
kinetic
energy
(TKE)
developed
as
function
velocity,
geometry,
which
showed
good
agreement
measured
TKE.
