Coefficients of Imperviousness

In 1999-2000, to improve our NEMO impervious surface modeling efforts research was conducted to generate Connecticut-specific land use/land cover (LULC) impervious surface coefficients. Accurate, large-scale and up-to-date planimetric data were used from four Connecticut municipalities (right).

These data include the outlines, or footprints, of specific landscape features, thus allowing us to create a digital GIS database of impervious surface features that included buildings, roads, driveways, sidewalks and other constructed landscape features (bottom, in a detail from the town of Marlborough).

Planimetric data from these four towns was used to create accurate land cover coefficients.

Example of highly accurate planimetric data for Marlborough, CT.