James Buttle Review: The Characteristics of Baseflow Resilience Across Diverse Ecohydrological Terrains
Hydrological Processes,
Journal Year:
2025,
Volume and Issue:
39(3)
Published: March 1, 2025
ABSTRACT
The
dynamic
storage
of
aquifers
is
the
portion
groundwater
that
can
potentially
drain
to
any
given
point
along
a
stream
create
baseflow.
Baseflow
typically
occurs
year‐round
in
perennial
streams,
though
characteristics
and
stability
are
often
most
important
instream
processes
during
extended
dry
periods
(without
precipitation
snowmelt)
when
runoff
quickflows
minimised.
term
‘baseflow
resilience’
defined
for
this
review
as
tendency
baseflow
streams
maintain
consistent
volume
water
quality
year
while
under
stress
from
climate
variability
extremes,
with
anthropogenic
stressors
such
withdrawals,
land
use
change,
degradation.
‘Baseflow
has,
part,
user‐defined
meaning
spanning
supply
variables
primary
interest.
Watershed
directly
impact
resilience
produce
non‐intuitive
feedbacks
enhance
some
attributes
simultaneously
impairing
others.
For
example,
permeable
corridor
geology
creates
strong
stream‐groundwater
hydrologic
connectivity,
yet
fast
drainage
via
preferential
high‐permeability
flowpaths
lead
streamflow
not
being
sustained
periods.
Also,
shallow
sources
generally
more
immediately
vulnerable
extreme
events,
warming,
salinization,
transpiration,
drought,
compared
deeper
groundwater.
Yet
drought
influenced
by
lag
years,
contaminant
legacies
may
propagate
through
deep
receiving
waters
decades
centuries.
Finally,
irrigation
withdrawals
intercept
would
have
drained
application
leach
contaminants
soil
zone
unnaturally
raising
tables,
return
flows
sustain
groundwater‐dependent
habitats
semiarid
areas.
This
covers
concept
context
summarises
common
hydrogeological
controls
on,
multiscale
of,
storage.
Further,
we
present
several
quantitative
metrics
assess
range
using
both
broadly
available
boutique
data
types,
subset
which
demonstrated
Delaware
River
Basin,
USA.
Language: Английский
Taking heat (downstream): Simulating groundwater and thermal equilibrium controls on annual paired air–water temperature signal transport in headwater streams
Journal of Hydrology,
Journal Year:
2024,
Volume and Issue:
638, P. 131391 - 131391
Published: May 23, 2024
Language: Английский
Diel temperature signals track seasonal shifts in localized groundwater contributions to headwater streamflow generation at network scale
Journal of Hydrology,
Journal Year:
2024,
Volume and Issue:
639, P. 131528 - 131528
Published: June 16, 2024
Groundwater
contributions
to
streamflow
sustain
aquatic
ecosystem
resilience;
streams
without
significant
groundwater
inputs
often
have
well-coupled
air
and
water
temperatures
that
degrade
cold-water
habitat
during
warm
low
flow
periods.
Widespread
uncertainty
in
stream-groundwater
connectivity
across
space
time
has
created
disparate
predictions
of
energy
nutrient
fluxes
headwater
networks,
hindering
resilience
under
climate
change
scenarios.
Recently,
annual
paired
temperature
signals
been
harnessed
indicate
stream
thermal
sensitivity
the
dominance
deep
versus
shallow
influence,
although
utility
diel
air–water
signal
metrics
for
hydrologic
inference
remained
unexplored.
Here
we
analyzed
two
consecutive
years
locally
paired,
data
from
47
sites
Catskill
Mountains,
New
York,
USA,
discovered
characteristic
seasonal
patterns
sinusoid
(amplitude
ratio,
phase
lag,
mean
ratio)
driven
by
shifts
generation
mechanisms
network
position.
Hydrologic
interpretations
observed
were
supported
heat
budget
model
scenarios
additional
analysis
Shenandoah
National
Park,
Virginia,
with
well
characterized
connectivity.
We
found
within
smaller
tributaries,
transitions
runoff
hillslope
drying
periods
lower
precipitation.
This
was
evidenced
correlations
(p
<
0.01)
between
daily
water:air
amplitudes
(non-linear
decreases
∼
50
%)
derived
base-flow
index
at
22
28
sites,
indicating
enhanced
local
influence
on
promotes
decoupling
signals.
Additionally,
ratios
means
tributaries
(∼0.68)
when
compared
main-stem
(∼0.8)
increasing
linearly
throughout
observational
period.
In
conceptual
models,
inflow
had
minimal
effects
lags
(∼0.2
hr),
but
increases
fractional
discharge
(0–50
depressed
amplitude
(∼20
%
(∼15
%),
supporting
interpreted
changes
streamflow.
During
(i.e.,
April
through
October
2021
2022),
differences
tributary
occurred
highest
(∼0.93
vs.
0.68),
as
dominated
channel
inertia,
rather
than
connectivity,
showing
coupling
warmer,
drier
Divergent
being
distance
source
zones,
lateral
inflows
do
not
contribute
a
meaningful
fraction
network.
Given
growing
footprint
observations,
can
provide
distributed
sensitive
upstream
discharge.
Consequently,
these
support
ongoing
efforts
resource
managers
researchers
seeking
forecast
warming
changing
precipitation
regimes
mountain
streams.
Language: Английский
Declines in Brook Trout Abundance Linked to Atmospheric Warming in Maryland, USA
Hydrobiology,
Journal Year:
2024,
Volume and Issue:
3(4), P. 310 - 324
Published: Oct. 1, 2024
Salmonid
fishes
provide
an
important
indicator
of
climate
change
given
their
reliance
on
cold
water.
We
evaluated
temporal
changes
in
the
density
stream-dwelling
brook
trout
(Salvelinus
fontinalis)
from
surveys
conducted
over
a
36-year
period
(1988–2023)
by
Maryland
Department
Natural
Resources
Eastern
North
America.
Nonparametric
trend
analyses
revealed
decreasing
densities
adult
fish
(age
1+)
19
sites
(27%)
and
increases
5
(7%).
In
contrast,
juvenile
0)
decreased
4
(6%)
increased
10
(14%).
Declining
trends
were
related
to
atmospheric
warming
rates
during
study
period,
this
relationship
was
stronger
than
effects
land
use
or
non-native
brown
trout.
generally
with
elevation
but
not
air
temperature
change.
Our
analysis
reveals
significant
several
populations
recent
decades
implicates
conditions
population
declines.
findings
also
suggest
importance
for
survival
rather
recruitment
limitation
dynamics.
Language: Английский