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Remotely
sensed land cover for that area. Each color denotes a distinct land
cover class (red = commercial & industrial, etc.)
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Coefficients
of imperviousness are applied to each of the land cover classes.
The darker the red, the higher the % of imperviousness.
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These
percentages are depicted in a “stoplight” color scheme
for ease of interpretation. Red indicates high levels of impervious
cover that research indicates will be injurious to water resources.
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Percent
imperviousness is then calculated for each watershed
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The
imperviousness map is overlain by a map of local watersheds.
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