Earth and Space Science,
Journal Year:
2016,
Volume and Issue:
3(5), P. 190 - 206
Published: May 1, 2016
Abstract
Integrated
modeling
of
coupled
surface‐subsurface
flow
and
ensuing
role
in
diverse
Earth
system
processes
is
current
research
interest
to
characterize
nonlinear
rainfall‐runoff
response
also
understand
land
surface
energy
balances,
biogeochemical
processes,
geomorphological
dynamics,
etc.
A
growing
number
complex
models
have
been
developed
for
water‐related
research,
many
these
are
made
available
the
science
community.
However,
relatively
few
resources
accessible
potentially
large
group
engineering
users.
New
users
invest
an
extraordinary
effort
study
models.
To
provide
a
stimulating
experience
focusing
on
learning
curve
integrated
flow,
we
describe
use
cases
open
source
model,
Penn
State
Hydrologic
Model,
PIHM.
were
guided
through
data
processing
model
application
by
reproducing
numerical
benchmark
problem
real‐world
watershed
simulation.
Specifically,
document
PIHM
its
computational
workflow
enable
intuitive
understanding
processes.
In
addition,
user
as
important
evidence
significance
reusability.
The
interaction
shows
that
documentation
data,
software,
papers
promising
method
foster
scientific
collaboration
reuse.
This
demonstrates
how
practice
would
promote
utility
software.
Addressing
such
publications
journal
papers.
Further,
popularization
will
require
coordination
among
communities,
funding
agencies,
journals.
Science,
Journal Year:
2016,
Volume and Issue:
353(6297), P. 377 - 380
Published: July 22, 2016
Groundwater
flow
drives
partitioning
Soil
evaporation
and
plant
transpiration
together
contribute
a
substantial
proportion
of
terrestrial
freshwater
fluxes.
Land
surface
models
are
used
to
understand
the
these
fluxes
on
continental
scale;
however,
model
outputs
often
inconsistent
with
stable
isotope
observations.
Maxwell
Condon
incorporated
dynamic
groundwater
into
an
integrated
hydrologic
simulation
for
entire
United
States.
The
showed
that
water
table
depth
lateral
strongly
affect
partitioning,
thus
explaining
inconsistencies
between
observations
models.
Science
,
this
issue
p.
377
Journal of Forestry,
Journal Year:
2020,
Volume and Issue:
118(2), P. 172 - 192
Published: Feb. 12, 2020
Abstract
In
coniferous
western
forests,
recent
widespread
tree
mortality
provided
opportunities
to
test
the
long-held
theory
that
forest
cover
loss
increases
water
yield.
We
reviewed
78
studies
of
hydrologic
response
standing-replacing
(severe
wildfire,
harvest)
or
nonstand-replacing
(drought,
insects,
low-severity
wildfire)
disturbances,
and
reassessed
question:
Does
yield
snowpack
increase
after
disturbance?
Collective
results
indicate
postdisturbance
streamflow
may
increase,
not
change,
even
decrease,
illuminate
factors
help
improve
predictability
disturbance.
Contrary
expectation
reduces
evapotranspiration,
making
more
available
as
runoff,
evapotranspiration
sometimes
increased—particularly
following
disturbance—because
(a)
increased
evaporation
resulting
from
higher
subcanopy
radiation,
(b)
transpiration
rapid
growth.
Postdisturbance
depends
on
vegetation
structure,
climate,
topography,
new
hypotheses
continue
be
formulated
tested
in
this
rapidly
evolving
discipline.
Water Resources Research,
Journal Year:
2018,
Volume and Issue:
54(2), P. 1191 - 1211
Published: Feb. 1, 2018
Abstract
Snow
sublimation
is
an
important
component
of
the
snow
mass
balance,
but
spatial
and
temporal
variability
this
process
not
well
understood
in
mountain
environments.
This
study
combines
a
process‐based
model
(SnowModel)
with
eddy
covariance
(EC)
measurements
to
investigate
(1)
spatio‐temporal
simulated
respect
station
observations,
(2)
contribution
ablation
snowpack,
(3)
sensitivity
response
bark
beetle‐induced
forest
mortality
climate
warming
across
north‐central
Colorado
Rocky
Mountains.
EC‐based
observations
compared
at
stations
dominated
by
surface
canopy
sublimation,
blowing
alpine
areas
was
captured
EC
instrumentation.
Water
balance
calculations
provided
validation
watershed
scale.
Simulated
area
equivalent
28%
winter
precipitation
on
average,
highest
relative
fluxes
occurred
during
lowest
years.
from
forested
accounted
for
majority
fluxes,
highlighting
importance
sub‐canopy
region.
Simulations
incorporating
effects
tree
due
bark‐beetle
disturbance
resulted
4%
reduction
areas.
rates
corresponding
simulations
remained
unchanged
or
slightly
increased,
total
losses
decreased
up
6%
because
covered
duration.
Water Resources Research,
Journal Year:
2022,
Volume and Issue:
58(4)
Published: March 11, 2022
Abstract
Highly
simplified
approaches
continue
to
underpin
hydrological
climate
change
impact
assessments
across
the
Earth's
mountainous
regions.
Fully‐integrated
surface‐subsurface
models
may
hold
far
greater
potential
represent
distinctive
regimes
of
steep,
geologically‐complex
headwater
catchments.
However,
their
utility
has
not
yet
been
tested
a
wide
range
settings.
Here,
an
integrated
model
two
adjacent
calcareous
Alpine
headwaters
that
accounts
for
two‐dimensional
surface
flow,
three‐dimensional
(3D)
variably‐saturated
groundwater
and
evapotranspiration
is
presented.
An
energy
balance‐based
representation
snow
dynamics
contributed
model's
high‐resolution
forcing
data,
sophisticated
3D
geological
helped
define
parameterize
its
subsurface
structure.
In
first
known
attempt
calibrate
catchment‐scale
region
automatically,
numerous
uncertain
parameters
were
estimated.
The
salient
features
regime
could
ultimately
be
satisfactorily
reproduced
–
over
11‐month
evaluation
period,
Nash‐Sutcliffe
efficiency
simulated
streamflow
at
main
gauging
station
was
0.76.
Spatio‐temporal
visualization
data
responses
further
confirmed
broad
coherence.
Presumably
due
unresolved
local
heterogeneity,
closely
replicating
somewhat
contrasting
level
signals
observed
near
one
another
proved
more
elusive.
Finally,
we
assessed
impacts
various
simplifications
assumptions
are
commonly
employed
in
physically‐based
modeling
including
use
spatially
uniform
forcings,
vertically
limited
domain,
global
products
on
key
outputs,
finding
strongly
affected
performance
many
cases.
Although
certain
outstanding
challenges
must
overcome
if
uptake
mountain
regions
around
world
increase,
our
work
demonstrates
feasibility
benefits
application
such
complex
systems.
Ecological Indicators,
Journal Year:
2023,
Volume and Issue:
147, P. 109987 - 109987
Published: Feb. 10, 2023
Hypoxia,
or
dissolved
oxygen
(DO)
at
low
enough
levels
to
impair
organisms,
is
a
particularly
useful
indicator
of
the
health
freshwater
ecosystems.
However,
due
limited
sampling
in
headwater
networks,
degree,
distribution,
and
timing
hypoxia
events
are
not
known
across
vast
majority
most
river
networks.
We
thus
sought
clarify
extent
networks
through
three
years
instrumentation
78
sites
eight
temperate,
agricultural
watersheds.
observed
broadly
distributed
hypoxia,
occurring
4
%
time
51
over
20
months.
The
was
driven
by
mechanisms:
storm
events,
drying,
rewetting,
with
drying
as
common
driver
(55
all
hypoxic
event
types).
Drying
induced
severe
smaller
streams
(Strahler
orders
≤
3),
whereas
preferentially
larger
3–5).
A
large
diversity
DO
trajectories
towards
depended
on
hydrologic
type,
subsequent
expected
differences
mortality
profiles
sensitive
species.
Predictive
models
showed
vulnerable
were
small
slope,
during
hot,
discharge
periods.
Despite
variation
among
there
remarkable
similarity
rate
drawdown
(ca.
1
mg
O2
L−1
d−1).
This
may
be
rule-of-thumb
for
managers,
we
hypothesize
that
it
either
signal
increasing
lateral
inflow
water
downstream
demand.
Overall,
posit
likely
feature
often
goes
undetected.
Headwater
become
more
under
increasingly
dry
conditions
associated
climate
resource
management
changes,
important
implications
biological
communities
biogeochemical
processes.
Environmental Research Letters,
Journal Year:
2017,
Volume and Issue:
13(1), P. 014010 - 014010
Published: Nov. 22, 2017
Continued
growth
of
the
human
population
on
Earth
will
increase
pressure
already
stressed
terrestrial
water
resources
required
for
drinking
water,
agriculture,
and
industry.
This
stress
demands
improved
understanding
critical
controls
resource
availability,
particularly
in
water-limited
regions.
Mechanistic
predictions
future
availability
are
needed
because
non-stationary
conditions
exist
form
changing
climatic
conditions,
land
management
paradigms,
ecological
disturbance
regimes.
While
historically
disturbances
have
been
small
could
be
neglected
relative
to
effects,
evidence
is
accumulating
that
disturbances,
wildfire,
can
regional
availability.
However,
wildfire
hydrologic
impacts
typically
estimated
locally
at
spatial
scales,
via
disparate
measurement
methods
analysis
techniques,
outside
context
climate
change
projections.
Consequently,
importance
driven
versus
streamflow
remains
unknown
across
western
USA.
Here
we
show
considering
modeling
significantly
improves
model
predictions.
Mixed
effects
attributed
2%−14%
long-term
annual
effects.
The
this
wildfire-linked
predicted
change-induced
reductions
ranged
from
20%−370%
decrease
occur
by
2050.
rate
post-wildfire
vegetation
recovery
proportion
watershed
area
burned
controlled
effect.
Our
results
demonstrate
large
areas
USA
affected
subject
greater
structural
uncertainty
than
previously
thought.
These
suggest
streamflows
may
underestimated
increased
prevalence
hydrologically
relevant
such
as
wildfire.
Water Resources Research,
Journal Year:
2017,
Volume and Issue:
53(12), P. 10007 - 10016
Published: Oct. 24, 2017
Abstract
This
special
issue
is
the
result
of
several
fruitful
conference
sessions
on
disturbance
hydrology,
which
started
at
2013
AGU
Fall
Meeting
in
San
Francisco
and
have
continued
every
year
since.
The
stimulating
presentations
discussions
surrounding
those
focused
understanding
both
disruption
hydrologic
functioning
following
discrete
disturbances,
as
well
subsequent
recovery
or
change
within
affected
watershed
system.
Whereas
some
disturbances
are
directly
linked
to
anthropogenic
activities,
such
resource
extraction,
contributions
this
focus
primarily
with
indirect
less
pronounced
human
involvement,
bark‐beetle
infestation,
wildfire,
other
natural
hazards.
However,
activities
enhancing
severity
frequency
these
seemingly
thereby
contributing
acute
problems
Major
research
challenges
for
our
increasingly
disturbed
planet
include
lack
continuous
pre
postdisturbance
monitoring,
impacts
that
vary
spatially
temporally
based
environmental
hydroclimatic
conditions,
preponderance
overlapping
compounding
sequences.
In
addition,
a
conceptual
framework
characterizing
commonalities
differences
among
still
its
infancy.
introduction
issue,
we
advance
fusion
concepts
terminology
from
ecology
hydrology
begin
filling
gap.
We
briefly
explore
preliminary
approaches
comparing
different
their
impacts,
provides
starting
point
further
dialogue
progress.
Meteorological Monographs,
Journal Year:
2018,
Volume and Issue:
59, P. 25.1 - 25.51
Published: Jan. 1, 2018
The
focus
of
this
chapter
is
progress
in
hydrology
for
the
last
100
years.
During
period,
we
have
seen
a
marked
transition
from
practical
engineering
to
fundamental
developments
hydrologic
science,
including
contributions
Earth
system
science.
first
three
sections
review
advances
theory,
observations,
and
prediction.
Building
on
foundation,
growth
global
hydrology,
land–atmosphere
interactions
coupling,
ecohydrology,
water
management
are
discussed,
as
well
brief
summary
emerging
challenges
future
directions.
Although
attempts
be
comprehensive,
offers
greater
coverage
surface
hydrometeorology
readers
American
Meteorological
Society
(AMS)
monograph.
Hydrology and earth system sciences,
Journal Year:
2018,
Volume and Issue:
22(1), P. 709 - 725
Published: Jan. 26, 2018
Abstract.
Accelerated
climate
change
and
associated
forest
disturbances
in
the
southwestern
USA
are
anticipated
to
have
substantial
impacts
on
regional
water
resources.
Few
studies
quantified
impact
of
both
land
cover
balances
basin
scale,
none
scale.
In
this
work,
we
evaluate
a
headwater
Colorado
River,
San
Juan
River
watershed,
using
robustly
calibrated
(Nash–Sutcliffe
efficiency
0.76)
hydrologic
model
run
with
updated
formulations
that
improve
estimates
evapotranspiration
for
semi-arid
regions.
Our
results
show
future
will
streamflow
implications
resource
management.
findings
contradiction
conventional
thinking
reduce
increase
streamflow.
study,
annual
average
under
coupled
climate–disturbance
scenarios
is
at
least
6–11
%
lower
than
those
accounting
alone;
forested
zones
basin,
15–21
lower.
The
monthly
signals
altered
point
an
emergent
pattern
related
changes
forests
disturbed
systems.
Exacerbated
reductions
mean
low
flows
disturbance
indicate
high
risk
availability
systems
basin.
These
also
explicit
representation
required
modeling
efforts
consider