Estimation Tool for Impervious Surfaces (ETIS) Anna Chabaeva Jason Parent Daniel Civco Department of Natural Resources Management & Engineering The University of Connecticut U-4087, Room 308, 1376 Storrs Road Storrs, CT

Objectives Describe functionality of newly developed ETIS tool Compare predicted amount of imperviousness to: highly accurate and precise planimetric data ISAT derived impervious surface data (NLCD, CCL) NLCD 2001 impervious surface layer CCL 2002 impervious surface layer

Impervious Surface (IS) The imprint of land development on the landscape: Rooftops Buildings Pools Patios Transportation System Roads Sidewalks Driveways Parking lots

Influence of Impervious Surfaces on Water Quality DEGRADED PROTECTED IMPACTED WATERSHED IMPERVIOUSNESS (%)

ETIS – Regression Model where - b 1 is the IS-axis intercept - b 2 is the coefficient for population density - b i are those for percentage of land cover category area within the tract - PopDen is the Population density - %A i are the percent of the land cover category area within the tract Calibration Data 221 NY tracts Validation Data 82 CT tracts

ETIS Overview IS for existing conditions IS for changing conditions

ETIS Data Requirements

ETIS Data Requirements Land Cover GRID, IMG, TIFF

ETIS Data Requirements Analysis Unit SHP

ETIS Data Requirements Percent Imperviousness Estimates

ETIS Data Requirements Population Density People/sq mi

Preloaded ETIS Data Requirements Coefficients DBF

ETIS Data Requirements Change Layer SHP

ETIS Comparison RMSER-squared NLCD Sub-pixel CCL Sub-pixel NLCD ISAT CCL ISAT NLCD ETIS CCL ETIS

ETIS Web Site

ETIS Download

Estimation Tool for Impervious Surfaces (ETIS) Anna Chabaeva Jason Parent Daniel Civco Department of Natural Resources Management & Engineering The University of Connecticut U-4087, Room 308, 1376 Storrs Road Storrs, CT