How Alluvial Storage Controls Spatiotemporal Water Balance Partitioning in Intermittent and Ephemeral Stream Systems
Water Resources Research,
Journal Year:
2025,
Volume and Issue:
61(4)
Published: April 1, 2025
Abstract
The
hydrological
dynamics
of
intermittent
rivers
and
ephemeral
streams
(IRES)
impacts
the
availability
water
to
riparian
ecosystems,
height
downstream
runoff
peaks,
replenishment
groundwater
systems.
Despite
its
significance,
influence
superficial
geology
on
IRES
flow
processes
remains
an
area
limited
understanding.
Here
we
first
present
a
comprehensive
data
set
encompassing
streamflow
levels
from
stream
situated
in
New
South
Wales,
Australia.
We
then
use
targeted
geophysical
investigations
show
how
configurations
control
responses.
analysis
reveals
that
periods
stable
stage
consistently
occur
after
episodic
surges
streamflow,
followed
by
recession
channel
desiccation.
duration
phases
exhibits
upstream‐to‐downstream
pattern,
reaching
maximum
44
±
3
days
upstream
abruptly
declining
further
downstream.
There
is
remarkable
consistency
these
periods,
irrespective
size
preceding
peaks.
propose
two
primary
controls
this
behavior:
(a)
variability
permeability
contrasts
between
alluvium
surrounding
geological
deposits,
(b)
longitudinal
fluctuations
volume
recent
alluvial
reservoir.
interplay
generates
“goldilocks
zone,”
which
optimizes
potential
for
recharge
landscapes.
These
may
reflect
continuum
other
dryland
catchments
with
widespread
implications
classification
based
occurrence
duration.
Language: Английский
STICr: An open-source package and workflow for Stream Temperature, Intermittency, and Conductivity (STIC) data
Environmental Modelling & Software,
Journal Year:
2025,
Volume and Issue:
unknown, P. 106484 - 106484
Published: April 1, 2025
Language: Английский
Diel dissolved organic matter patterns reflect spatiotemporally varying sources and transformations along an intermittent stream
Limnology and Oceanography,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 18, 2024
Abstract
Stream
dissolved
organic
matter
(DOM)
is
a
globally
important
carbon
flux
and
locally
control
on
stream
ecosystems,
therefore
understanding
controls
DOM
fluxes
dynamics
crucial
at
both
local
global
scales.
However,
attributing
process
challenging
because
hydrological
biological
are
integrated
may
vary
over
time
throughout
networks.
Our
objective
was
to
assess
the
patterns
corresponding
of
diel
cycles
through
seasonal
flow
recession
by
using
reach‐scale
in
situ
sensors
non‐perennial
network.
We
identified
five
characteristic
variations
with
differing
phase
amplitude.
During
snowmelt
flows,
were
consistent
among
sites
reflected
flowpath
shifts
photodegradation.
Evapotranspiration‐driven
stage
oscillations
emerged
two
upstream
sites,
shaping
indirectly,
creating
conditions
for
instream
processing.
At
spring‐fed
site,
minimal
variation
observed
summer
whereas
an
intermittent
reach,
daily
drying
rewetting
created
biogeochemical
hot
moments.
This
research
demonstrates
that
space,
even
close
proximity,
generating
asynchronous
fDOM
during
low
illuminating
processes
flowpaths.
Language: Английский
Comparison of the Dynamics of the Flowing Drainage Network and Water Chemistry for Four Headwater Catchments
Ecohydrology,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 30, 2024
ABSTRACT
The
re‐emergence
of
water
in
dry
stream
reaches
affects
streamwater
chemistry
due
to
the
flushing
sediment
and
nutrients
from
previously
channels
increased
connectivity
between
hillslopes
streams.
Although
these
processes
have
been
studied
at
reach
scale,
field
data
on
network
dynamics
hydrochemistry
catchment
scale
are
rare.
We
temporal
changes
flowing
drainage
(FDN)
for
two
5‐ha
catchments
Swiss
pre‐Alps
25‐
32‐ha
Plateau.
At
each
site,
one
was
relatively
flat
had
an
extensive
augmented
by
artificial
ditches,
while
other
steep
a
shorter
where
flow
maintained
springs.
FDN
differed
substantially
geomorphologically
different
region,
despite
their
proximity,
comparable
size,
soil
bedrock
characteristics.
Hydrochemistry
were
more
dynamic
flatter
with
but
shallow
ditches.
For
catchments,
nitrate
mobilisation
notable
‘first
flush’
solutes
observed
during
most
rainfall
events.
remained
stable
steeper
fed
perennial
These
results
highlight
spatial
variations
responses
precipitation
events
insights
that
can
be
gained
joint
observations
hydrochemical
dynamics.
Language: Английский