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Locations of sediment sampling sites, watersheds, and mapped sealed and unsealed pavement for 10 urban watersheds

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: January 27, 2026 | Last Modified: 2022-01-10T00:00:00Z
These data represent the locations of sediment sampling, the associated watershed boundaries for those sites, and the extents of sealed and unsealed parking lot pavement within 10 urban watersheds. These Geographic Information System (GIS) spatial layers were used to estimate area of sealed and unsealed driveways in residential neighborhoods. The percentage of the watershed that was sealed pavement and the percentage of the sediment sample from pavement dust were used as explanatory variables in statistical models of polycyclic aromatic hydrocarbons (PAH) and metal concentrations in the streams.

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