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This
report
discusses
how
natural
processes
and
human
activities
affect
the
interactions
of
ground
water
and
surface
water,
and
the
importance
of
considering
ground
water
and
surface
water
as
a
single
resource.
Topics
include
natural
processes
of
ground-
and
surface-water
interaction;
chemical
interactions;
and
the
effect
of
landscapes
on
these
interactions.
There
is
also
discussion
of
the
effects
...
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Choosing & Using this resource...
Educational standards associated with this resource:
National Science Education Standards (NSES): Read
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This
report
describes
the
results
of
a
major
United
States
Geological
Survey
(USGS)
geologic
and
oceanographic
study
of
the
Gulf
of
the
Farallones,
adjacent
to
the
San
Francisco
Bay
region.
The
first
of
its
kind,
the
investigation
was
intended
to
establish
a
scientific
database
for
an
area
of
3,400
square
kilometers
(1,000
square
nautical
miles)
on
the
continental
shelf
for
the
purpose
of
evaluating
...
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This
report
outlines
the
key
elements
of
a
comprehensive
and
effective
national
strategy
for
reducing
losses
from
landslides
nationwide
and
provides
an
assessment
of
the
status,
needs,
and
associated
costs
of
this
strategy.
Topics
include
the
rising
costs
resulting
from
landslide
damage,
the
role
of
the
federal
government
in
mitigating
this
hazard,
and
some
features
of
the
new
strategy
such
as
partnerships
...
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This
report
provides
an
overview
of
the
changes
that
occurred
in
lakes
in
the
region
around
Mount
St.
Helens
following
the
eruption
of
May
18,
1980.
Topics
include
water
chemistry,
sediment
supply,
and
biology.
Other
factors
which
are
discussed
include
the
proximity
of
lakes
to
the
volcano,
and
whether
they
were
situated
in
the
blast
zone
or
simply
received
ashfall
from
the
eruption.
Links
to
related
...
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Choosing & Using this resource...
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This
report
summarizes
the
Volcano
Hazards
Program
of
the
United
States
Geological
Survey
(USGS).
Topics
include
its
goals
and
activities,
some
key
accomplishments,
and
a
plan
for
future
operations.
There
are
also
discussions
of
active
and
potentially
active
volcanoes
in
the
U.S.,
the
role
of
the
USGS
volcano
observatories,
prediction
of
eruptions,
and
potential
danger
to
aircraft
from
volcanic
plumes.
...
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This
report
discusses
the
spatial
distribution
of
the
largest,
most
damaging
floods
in
the
United
States
and
some
of
the
factors
that
affect
this
distribution.
Topics
include
regional
climatology,
topography,
and
basin
size.
A
discussion
of
climatological
factors
includes
the
general
northward
trend
of
decreasing
atmospheric
moisture;
proximity
to
oceanic
moisture
sources
such
as
the
Pacific
Ocean
...
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This
report,
part
of
a
series
that
analyzes
population
and
housing
data
collected
from
the
census
of
2000,
highlights
population
size
and
distribution
changes
between
1990
and
2000
in
regions,
states,
counties,
and
large
cities.
Data,
maps,
and
discussion
are
used
to
examine
the
size
of
the
population
increase,
which
states
and
regions
experienced
the
largest
growth,
where
the
largest
proportion
of
...
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This
report
provides
an
overview
of
the
exchange
of
greenhouse
gases,
their
influences
on
climate,
viability
of
ecosystems,
distribution
of
biomes,
quantities
of
surface-
and
ground-water,
and
some
research
projects
in
place
to
investigate
these
influences.
Topics
include
lake-atmosphere
carbon
dioxide
exchange,
sequestering
and
exchange
of
atmospheric
carbon
dioxide
in
boreal
and
subalpine
forests,
...
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Choosing & Using this resource...
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This four-page fact sheet provides a brief summary of the analysis of land use in urban environments. Topics include the rapid growth in urban populations, some of the methods used to analyze land use change (mapping, databases, time series documents), and some of the concerns and possible consequences created by the rapid shift of human populations to urban centers.
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Choosing & Using this resource...
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This fact sheet provides an overview of the hazards presented by landslides and debris flows, particluarly in wet weather conditions in landslide-prone areas. Topics include a discussion of the characteristics of debris flows, and suggestions for residents who live in steep, hilly terrain which is subject to periodic heavy rains.
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