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Impervious Area by Watershed-Grand Isle County

1,650 acres 2011

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Story Behind the Curve
Watershed Impervious Area
Missisquoi River 45 acres
Lake Champlain Direct 1,605 acres 

This indicator measures the amount of land area that is covered by impenetrable materials that impede rainwater infiltration and natural groundwater recharge. Impervious surfaces include roads, sidewalks, driveways, parking lots, and buildings. When rainwater is not being absorbed into the ground, it is running off impervious surfaces and collecting debris and pollutants that enter the waterways within the watershed. A watershed is an area of land where all water travels to the lowest point which is typically a river, stream, or lake.2

Why Is This Important?

Cumulative impacts from runoff within our watersheds degrade water quality,aquatic habitat, and alters stability of river corridors and lake shores. 2 

References

2. Cittenden County Regional Planning Comission-ECOS Scorecards 

Scorecard Result Program Indicator Performance Measure Action Actual Value Target Value Tag S R I P PM A m/d/yy m/d/yyyy