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1995 Impervious Surface Estimates by Local Watershed

Salisbury North Canaan Norfolk Colebrook Hartland Granby Suffield Enfield Somers Stafford Union Woodstock Thompson Canaan East Granby Barkhamsted Winchester Eastford Ashford Willington Ellington Windsor Locks East Windsor Putnam Tolland Windsor Sharon Canton Simsbury Cornwall Pomfret Goshen Killingly Bloomfield New Hartford Torrington Vernon South Windsor Coventry Mansfield Chaplin Hampton Brooklyn Avon Manchester Burlington Hartford Bolton West Hartford East Hartford Harwinton Litchfield Kent Warren Sterling Farmington Plainfield Andover Canterbury Windham Scotland Glastonbury Columbia Hebron Wethersfield Newington Bristol Morris New Britain Lebanon Plymouth Washington Thomaston Plainville Marlborough Rocky Hill New Milford Watertown Bethlehem Sherman Franklin Sprague Southington Berlin Lisbon Voluntown East Hampton Griswold Wolcott Portland Cromwell Colchester Waterbury Woodbury Norwich Roxbury Middletown Bozrah Meriden Preston Middlebury Bridgewater Cheshire Middlefield Salem East Haddam New Fairfield Prospect North Stonington Montville Naugatuck Haddam Brookfield Wallingford Southbury Durham Oxford Ledyard Newtown Bethany Beacon Falls Danbury Hamden East Lyme Killingworth Lyme Madison Stonington North Haven Chester Guilford Bethel Waterford North Branford Seymour Groton Deep River Woodbridge Monroe New London Essex Ridgefield Shelton East Lyme East Lyme Old Lyme Stonington East Haven Ansonia Stonington Stonington Derby Redding New Haven Stonington Westbrook Stonington Stonington Stonington Stonington Stonington Old Saybrook Stonington New London Stonington Clinton Groton New London Stonington Stonington Stonington Stonington Groton Stonington Stonington Easton Stonington Stonington Stonington Stonington Stonington Stonington Stonington Stonington Branford Groton Groton Groton Groton New London Stonington Groton Groton East Lyme Stonington Groton East Lyme Groton Groton Orange West Haven Groton East Lyme Waterford Old Lyme Old Saybrook Old Saybrook East Lyme 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Results of the Impervious Surface Analysis Tool (ISAT) for the 1995 land cover for Connecticut. The warmer colors have more imperviousness than the cooler colors.

The black line separates the coastal study area* towns used for analysis by the CALCAP project from the inland towns. Data are averaged by local watershed (not shown).

Download the pdf file for a map layout for printing that includes basin boundaries. The pdf file also allows zooming.

The ISAT was used with the 1995 land cover along with a set of derived coefficients in order to estimate impervious surface area for each local watershed in Connecticut. The Impervious Surface Section of the NEMO website discusses a number of methods for mapping imperviousness. The section on ISAT describes this method and links to the NOAA website where you can download the ISAT as well as a link to the coefficients derived for the Connecticut land cover.

* The Coastal Study Area consists of the 36 Coastal Area Towns in Connecticut plus six towns bordering the Connecticut River. Visit the Study Area page for a map and the full definition of the Coastal Area and Coastal Boundary.

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