Abstract.
Non-floodplain
wetlands
–
those
located
outside
the
floodplains
have
emerged
as
integral
components
to
watershed
resilience,
contributing
hydrologic
and
biogeochemical
functions
affecting
watershed-scale
flooding
extent,
drought
magnitude,
water-quality
maintenance.
However,
absence
of
a
global
dataset
non-floodplain
limits
their
necessary
incorporation
into
water
quality
quantity
management
decisions
affects
wetland-focused
wildlife
habitat
conservation
outcomes.
We
addressed
this
critical
need
by
developing
publicly
available
Global
NFW
(non-floodplain
wetland)
dataset,
comprised
river-floodplain
map
at
90
m
resolution
coupled
with
ensemble
wetland
incorporating
multiple
data
layers.
The
floodplain,
wetland,
spatial
developed
here
were
successfully
validated
within
21
large
heterogenous
basins
across
conterminous
United
States.
identified
nearly
33
million
potential
an
estimated
extent
over
16
km2.
pixels
53
%
globally
pixels,
meaning
majority
globe’s
likely
occur
external
river
coastal
habitats.
NFWs
typically
small
(median
0.039
km2),
median
size
ranging
from
0.018–0.138
This
novel
geospatial
advances
resource-management
goals
while
providing
foundation
for
functional
assessments,
facilitating
inclusion
in
hydrological,
biogeochemical,
biological
model
development.
are
freely
through
States
Environmental
Protection
Agency’s
Dataset
Gateway
(https://gaftp.epa.gov/EPADataCommons/ORD/Global_NonFloodplain_Wetlands/)
https://doi.org/10.23719/1528331
(Lane
et
al.,
2023).
BioScience,
Journal Year:
2025,
Volume and Issue:
75(1), P. 68 - 91
Published: Jan. 1, 2025
Abstract
Connectivity—the
flows
and
exchanges
of
organisms,
materials,
energy
within
among
watersheds—is
a
central
paradigm
in
ecosystem
science.
Changes
those
connections
have
consequences
for
functioning
water
quality
downstream
upstream.
Therefore,
connectivity
is
cornerstone
federal
protection
under
the
United
States
Clean
Water
Act
(CWA).
In
present
article,
we
review
science
connectivity,
explain
history
changes
CWA
jurisdiction
defining
waters
States,
discuss
implications
US
policy,
highlight
key
steps
to
align
that
policy
with
The
Sackett
v.
EPA
(2023)
Supreme
Court
decision
significantly
reduced
wetlands
headwaters,
disregarding
their
larger,
protected
waterbodies.
To
fulfill
goals
restore
maintain
chemical,
physical,
biological
integrity
U.S.
waters,
Congress
must
amend
act,
fully
recognizing
multidimensional
aquatic
ecosystems
ultimately
incorporating
these
into
ecosystem-level
policy.
Hydrological Processes,
Journal Year:
2025,
Volume and Issue:
39(2)
Published: Feb. 1, 2025
ABSTRACT
In
dry
summer
months,
stream
baseflow
sourced
from
groundwater
is
essential
to
support
aquatic
ecosystems
and
anthropogenic
water
use.
Hydrologic
signatures,
or
metrics
describing
unique
features
of
streamflow
timeseries,
are
useful
for
quantifying
predicting
these
valuable
storage
resources
across
continental
scales.
signatures
can
be
predicted
based
on
catchment
attributes
summarising
climate
landscape
used
characterise
processes
that
cannot
directly
measured.
While
past
watershed‐scale
studies
suggest
important
controls
processes,
recent
regional‐to‐global
scale
modelling
have
instead
found
weaker
relationships
with
hydrologic
than
expected
compared
attributes.
this
study,
we
quantify
two
attributes,
average
geologic
age
the
proportion
area
covered
by
wetlands.
We
investigate
if
incorporating
additional
predictors
into
existing
large‐sample
attribute
datasets
strengthens
continental‐scale,
empirical
between
signatures.
14
related
in
catchments
contiguous
United
States,
evaluate
new
correlation
analysis
use
predict
random
forest
models.
was
a
highly
influential
predictor
especially
magnitude
catchments,
had
greater
importance
subsurface.
contrast,
wetlands
limited
influence
our
signature
predictions.
recommend
improve
predictions
Science,
Journal Year:
2024,
Volume and Issue:
385(6716), P. 1450 - 1453
Published: Sept. 26, 2024
In
2023,
the
US
Supreme
Court’s
majority
ruled
in
Sackett
v.
Environmental
Protection
Agency
that
only
wetlands
are
“indistinguishable”
from
federally
protected
waters
“due
to
a
continuous
surface
connection”
protected.
This
study
estimates
potential
impact
of
interpretations
ruling
on
federal
protections,
using
qualitative
measure
wetland
“wetness”
as
proxy
for
new
requirement.
An
estimated
area
ranging
~17
million
acres
(19%)
nearly
all
90
nontidal
conterminous
United
States
could
be
without
and
variability
state
protections
creates
hotspots
risk.
The
high-level
provided
here
represent
first
step
toward
understanding
long-term
impacts
highlight
uncertainty
introduced
by
ruling.
Earth system science data,
Journal Year:
2023,
Volume and Issue:
15(7), P. 2927 - 2955
Published: July 11, 2023
Abstract.
Non-floodplain
wetlands
–
those
located
outside
the
floodplains
have
emerged
as
integral
components
to
watershed
resilience,
contributing
hydrologic
and
biogeochemical
functions
affecting
watershed-scale
flooding
extent,
drought
magnitude,
water-quality
maintenance.
However,
absence
of
a
global
dataset
non-floodplain
limits
their
necessary
incorporation
into
water
quality
quantity
management
decisions
affects
wetland-focused
wildlife
habitat
conservation
outcomes.
We
addressed
this
critical
need
by
developing
publicly
available
“Global
NFW”
(Non-Floodplain
Wetland)
dataset,
comprised
river–floodplain
map
at
90
m
resolution
coupled
with
ensemble
wetland
incorporating
multiple
data
layers.
The
floodplain,
wetland,
spatial
developed
here
were
successfully
validated
within
21
large
heterogenous
basins
across
conterminous
United
States.
identified
nearly
33
million
potential
an
estimated
extent
over
16×106
km2.
pixels
53
%
globally
pixels,
meaning
majority
globe's
likely
occur
external
river
coastal
habitats.
NFWs
typically
small
(median
0.039
km2),
median
size
ranging
from
0.018–0.138
This
novel
geospatial
Global
NFW
static
advances
resource-management
goals
while
providing
foundation
for
functional
assessments,
facilitating
inclusion
in
hydrological,
biogeochemical,
biological
model
development.
are
freely
through
States
Environmental
Protection
Agency's
Dataset
Gateway
(https://gaftp.epa.gov/EPADataCommons/ORD/Global_NonFloodplain_Wetlands/,
last
access:
24
May
2023)
https://doi.org/10.23719/1528331
(Lane
et
al.,
2023a).