Predicting Urban Tree Health From Impervious Surface Cover

The impervious surface threshold can be used to identify planting sites where red maples will thrive. Trees surrounded by < 33% impervious surface cover (at 25 m) will most likely be in good or excellent condition. Trees surrounded by 33% - 66% are likely to be in fair condition. Trees surrounded by 67% or more tend to be in poor condition. Landscape architects, urban planners, arborists, landscapers, and other tree care professionals can use these impervious surface thresholds to reduce red maple management and replacement costs.. Arborists rate tree condition as poor, fair, good, or excellent. Impervious surface cover can be measured from satellite images with software such as ArcGIS or by using the Pace to Plant technique described. (Click on title for full story.)