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Multi-Scale Remote Sensing Mapping of Anthropogenic Impervious Surfaces: Spatial and Temporal Scaling Issues Related to Ecological and Hydrological Landscape Analyses

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Abstract:Anthropogenic impervious surfaces are leading contributors to non-point-source water pollution in urban watersheds. These human-created surfaces include such features as roads, parking lots, rooftops, sideways, and driveways. Aerial photography provides a historical vehicle for determining impervious surface growth and, with concurrent daily stream flow and precipitation records, allows the historical relationship of impervious surfaces and stream flow to be explored. Satellite-based remote sensing systems offer the ability to analyze large spatial areas but do not have the temporal (historical) scale of aerial photography. Our research is focused on the development of impervious surface ?truth' data sets derived from high-resolution remotely sensed imagery. We use these local ?truth' sets to do accuracy assessments of regional-scale estimators of impervious surfaces. Our methods will both be useful in developing regional-scale estimators of impervious surfaces and in determining the accuracy and appropriate spatial scale for application for other remotely sensed estimators of imperviousness. In this presentation, we will also discuss some of the spatial and temporal issues to consider when scaling estimators of imperviousness and trying to predict water quality outcomes as a result.

Our research partners include the US Geologic Survey, Montgomery County Department of Environmental Protection, University of Maryland - Baltimore County, and the Chesapeake Bay Program. Our research results will be employable by EPA units such as Regions and the Office of Water, States and local governments, and non-governmental organizations seeking to understand the relationship between anthropogenic impervious surfaces and water quality and quantity.
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Citation:Jarnagin, S. T., and D. B. Jennings. Multi-Scale Remote Sensing Mapping of Anthropogenic Impervious Surfaces: Spatial and Temporal Scaling Issues Related to Ecological and Hydrological Landscape Analyses. Presented at EPA Science Forum 2004, Washington, DC, June 1-3, 2004.
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Contact: Chris Siebert - (702) 798-2234 or siebert.christopher@epa.gov
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Division: Environmental Sciences Division
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Branch: Landscape Ecology Branch
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Product Type: Abstrct/Oral
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Presented: 06/01/2004
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Related Entries:
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Bullet Item Landscape Indicators of Surface Water Conditions
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