The Green Values® Stormwater Toolbox was originally developed primarily for use by planners, engineers and other municipal staff. This tool is utilized by entering information specific to the particular lot or land locations, size, coverage type, conventional development and then determining a runoff reduction goal. This toolbox is accompanied by a list of state, local and national standards relative to runoff and stormwater management. Once information is entered into the National Stormwater Calculators, green improvement options and advanced options allow the users to fine tune their goals as well as estimate benefits and costs for those green infrastructure improvements.
This guide is a basic guide reviewing the use of trees in stormwater. It defines urban stormwater runoff and explains why it is a problem, discusses the role of trees and how they help manage stormwater, provides an introduction to engineered systems available that utilize trees to manage a volume of stormwater, and presents presents projects from throughout the country that have successfully used trees in the engineered systems discussed. This guide is intended to help engineers, planners, developers, architects, arborists, and public officials understand how trees perform and interact in a stormwater management system, and the new technologies that are being used to increase the stormwater utility function of the urban forest, even in the densest urban environments.
The Center for Watershed Protection reviewed a total of 159 publications to evaluate:
- the effectiveness of urban tree planting on reducing runoff, nutrient, and sediment pollution; and
- how effectiveness varies by species, over time, differences in planting sites, and different maintenance strategies.