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Abstract
Using GIS and Aerial Photography to Determine a Historical Impervious Surface/Streamflow RelationshipTrack: Water Resources
Author(s): David B Jennings, S. Taylor Jarnagin
Impervious surfaces are a leading contributor to nonpoint-source water pollution in urban watersheds. These surfaces include such features as roads, parking lots, rooftops, and driveways. ArcView GIS and the ArcView Image Analysis extension have been utilized to georegister and map impervious surface areas from six dates of digital historical photography (1949 -1994) in the upper Accotink Creek subwatershed located in northern Virginia. This data, along with concurrent stream-flow and climate data, was then utilized to assess the historical relationship between the growth of impervious surfaces and changes in stream-flow. The integration of historical aerial photography and GIS can reveal historical changes in landscape pattern and shows promise as a tool for understanding long-term changes in ecosystem functions. Notice: The views expressed here are those of the individual authors and do not necessarily reflect the views and policies of the U.S. Environmental Protection Agency (EPA). The abstract was prepared by scientists in EPA's Office of Research and Development (ORD) and has been administratively reviewed and approved for publication.
David B Jennings
U.S. EPA
12201 Sunrise Valley Drive
555 National Center
Reston, VA 20192
USA
Phone: 7030648-4293
Fax: 703-648-4290
E-mail: jennings.david@epa.gov