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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
searchable
database
of
reports
and
thematic
maps
currently
contains
more
than
69,000
United
States
Geological
Survey
(USGS)
bibliographic
citations,
including
USGS
numbered
series
begun
as
early
as
1880.
The
basic
search
options
include
author
and/
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This
portal,
published
by
the
California
Environmental
Resources
Evaluation
System
(CERES),
features
links
to
environmental
information
arranged
under
three
categories:
natural
environment,
natural
resources,
and
the
human
environment.
Natural
environmental
topics
include
such
items
as
weather,
geology,
and
natural
disturbances
(earthquakes,
El
nino,
and
others).
Natural
resources
topics
include
minerals,
...
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The
United
States
Geological
Survey
(USGS)
is
the
primary
civilian
mapping
agency
of
the
United
States.
Materials
available
at
this
site
include
general
information
about
topographic
mapping,
and
information
about
USGS
map
products
and
how
to
obtain
them.
There
is
also
information
on
digital
raster
graphics
(DRG),
scanned
images
of
U.S.
Geological
Survey
(USGS)
standard
series
topographic
maps.
Other
...
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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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This
database
contains
an
extensive
selection
of
digital
data
and
imagery
of
the
San
Francisco
Bay
Area.
Products
include
Digital
Elevation
Models
(DEMs),
Digital
Line
Graphs
(DLGs),
Digital
Raster
Graphics
(DRGs),
Digital
Orthophotos
(DOQs),
and
historical
maps.
Most
of
these
items
are
available
at
a
scale
of
1:24,000;
other
scales
are
available
for
some.
Metadata
and
links
to
documents
outlining
...
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This
on-line
publication
illustrates
the
spatial
history
of
urban
growth
and
corresponding
land
use
change
in
sixteen
areas
around
the
United
States.
It
features
pairs
of
images
of
selected
urban
regions
from
across
the
nation
which
are
intended
to
show
the
transformation
that
these
areas
have
undergone
over
two
decades,
specifically
increases
in
the
extent
of
urban
land.
Each
pair
is
composed
of
...
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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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