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What do you need to know about using Impervious Surface
Cover Maps?
Polluted runoff from impervious surfaces in your watershed affects
the amount and the quality of water in your streams.
An ounce of prevention is worth a pound of cure.
If you know where the pavement is now and where it's going,
you'll be able to plan for the future.
Impervious Surface Cover in your county and watershed is the
most important indicator of the health of your streams. This
Web site includes brief, introductory text about impervious
surfaces and the impervious surface maps. For county maps, go
to the county selector for more about how that data is used.
For Watershed maps, go to the watershed selector for more about
how that data is used. You can interpret land use cover to obtain
impervious surfaces estimates. Find out more…go to remote sensing.
Even if you're not an expert, you'll need some information to
start. Here's what you'll need.
Use Impervious Surface Cover Data
Click on a link below to help you learn how to use this data:
- Where are you in the Chesapeake Bay watershed? The state where
you live and work has certain policies about polluted runoff. You
must be aware of these to help protect the streams in your town
or county. Chesapeake Bay watershed
map
- What is your role in protecting water quality? Are you an elected
official, a planning commissioner, an active citizen who wants to
learn more about how impervious surfaces affect your streams?
Learn more about your decision-making role.
- What decisions do you make? Do you participate in your local comprehensive
plan development? Do you adopt local land use regulations?
Do you review development plans? Learn
more about what decisions affect water quality.
- How much information about impervious surface cover do you need?
Do you know how geographic information systems (GIS) help or hinder
you? Learn more.
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