GIS Analysis

From 2002 to 2008 CVRPC collected impervious surface data for each municipality within the Central Vermont Region. CVRPC updated this data and performed a series of analyses to quantify the benefits of incorporating LID strategies. The impervious surface update included gathering information on new roads, driveways, residential/commercial/municipal developments, sidewalks, gravel/sand pits, rail lines and parking lots. CVRPC developed a model which utilized impervious surface data, GIS build‐out analysis data and average rainfall amounts to demonstrate the increases in stormwater run‐off if development continued to occur without LID strategies in place. An alternate model was created to illustrate the reduction of stormwater runoff if development incorporated LID techniques.