| Title: | Mapping Impervious Surfaces for Stormwater Management - Three Practical Approaches |
| Authors: | Kim Honetschlager, Christian Jacqz, Leslie Morrissey |
| Date/Time | Tuesday, November 6 ~ 10:30 am - 12:00 pm |
| Abstract: | EPA's Phase II Stormwater Rules require cities and towns to establish stormwater management programs. Several New England communities have established stormwater utilities in order to fund the new requirements. A stormwater utility provides dedicated funding by assessing a user fee - often based on impervious surface area -on property owners. This panel will compare three different sources of impervious surface data, discuss the technical aspects of each, as well as the political barriers to implementation. The Town of Reading, MA used high-resolution (6 inch pixel) orthophoto-derived planimetric data to calculate impervious surfaces. The presentation will cover how this vector data was used. MassGIS is now distributing an impervious surface raster data layer derived from medium-scale (1/2 meter) statewide four-band digital imagery. We will discuss the development of the data and illustrate its use at a regional scale and with parcel data. The City of South Burlington, VT stormwater utility is based on impervious surface data derived from integrated 0.6m panchromatic and 2.4m multispectral QuickBird satellite data using advanced object oriented classification techniques. Efforts to incorporate LIDAR data to differentiate impervious types are underway. |
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