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Trees and Stormwater Runoff (Green Stormwater Infrastructure)

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This collection contains current information regarding trees (urban forests and street trees) and stormwater runoff mitigation at the site or neighborhood scale. Frequently referred to as green stormwater infrastructure (GSI).

Follow this link if you are interested in resources related to GI at the landscape or watershed scale.

Evaluating the influence of design strategies and meteorological factors on tree transpiration in bioretention suspended pavement practices
Research looking at transpiration rates of trees in suspended pavement practices.
Stormwater Goes Green: The Benefit and Health of Trees in Green Stormwater Infrastructure (view webcast)
View the on-demand webcast for this presentation
The Health of Trees in Bioretention: A Survey and Analysis of Influential Variables
This research study compared the health of trees in bioretention systems in TN and NC with trees in other open-grown, urban settings.
Stormwater Goes Green: The Benefit and Health of Trees in Green Stormwater Infrastructure
This webcast was delivered on Jan. 29, 2018 by Andrew Tirpak through Forester University. It describes some of his research results looking at trees in bioretention practices in TN and NC.
Stormwater infiltration capacity of street tree pits: Quantifying the influence of different design and management strategies in New York City
This study aimed to understand the impact of different physical features of a tree pit on water infiltration capacity and to develop a data driven model that could link water infiltration rate to easily observable data.
Model My Watershed
A watershed-modeling web app that enables citizens, conservation practitioners, municipal decision-makers, educators, and students to analyze real land use and soil data in their neighborhoods and watersheds, model stormwater runoff and water-quality impacts using professional-grade models, and compare how different conservation or development scenarios could modify runoff and water quality.
Making Urban Trees Count
This spreadsheet tool, developed by the Center for Watershed Protection, is a science-based crediting system to “credit” trees for runoff and pollutant reduction to meet water quality requirements.
Gray 2 Green (G2G): A decision support tool for transitioning to vegetation-based stormwater management
G2G is a suite of tools and resources that allows users to site potential stormwater BMPs, test BMP scenarios, and share their results.
Trees and Stormwater
A repository for urban trees and stormwater management research, tools, and case studies to help local decision makers integrate trees into stormwater management design and policy.
Calculating Stormwater Volume and Total Suspended Solids Reduction under Urban Tree Canopy in Wisconsin Using Available Research
This article describes a simple method for calculating rainfall volume reduction by tree canopy cover over a parking lot.
Gray to Green (G2G): User Guide and Documentation
A decision support tool for transitioning to vegetation-based stormwater management. A product of the University of South Florida in partnership with the University of Florida and Thomas L. Singleton Consulting with grant funding assistance from the U.S. Forest Service.
Stormwater Nutrient Reduction: Using Riparian Buffers and Upland Urban Forest Systems
This presentation was given at StormCon 2017 on August 29, 2017.
Stormwater Management Benefits of Trees
The benefits of trees as stormwater management practices, especially in urban and suburban settings, have recently been more widely recognized. Here, we summarize recent work describing and quantifying the stormwater management benefits of trees, especially at the individual tree and property/site scales.
Review of the Available Literature and Data on the Runoff and Pollutant Removal Capabilities of Urban Trees
The Center for Watershed Protection reviewed a total of 159 publications to evaluate the research questions defined in the scope of this project: 1. What is the effectiveness of urban tree planting on reducing runoff, nutrient and sediment, and 2. How does effectiveness vary by species, over time, with differences in planting sites (e.g., distance from impervious cover or other trees, soil conditions, geographic location) and with different maintenance strategies.
The Role of Trees in Urban Stormwater Management
Arboriculture deserves additional consideration as a stormwater control measure. The reliable use of trees for stormwater control depends on improved understanding of how and to what extent trees interact with stormwater, and the context-specific consideration of optimal arboricultural practices and institutional frameworks to maximize the stormwater benefits trees can provide.
Quantifying the benefits of urban forest systems as a component of the green infrastructure stormwater treatment network
The purpose of this literature review is to highlight the limited research performed, document areas of need for quantifying the benefits of urban trees for stormwater management, and provide a basis for providing credits for trees in stormwater designs.
Give Me the Numbers: How trees and urban forests really affect stormwater runoff
This archived webinar, and supporting materials, was presented on February 8, 2017.
A Compendium of Urban Water Management Developments in Southeast Louisiana
This publication released by the Louisiana Urban Stormwater Coalition describes the need for managing (not controlling) stormwater, making space for and living with water, and working with hydrologic cycles in South Louisiana.
Give Me the Numbers: How Trees and Urban Forest Systems Really Affect Stormwater Runoff (Manuscript)
Article published in Stormwater Magazine on-line October 2016 taken from a manuscript submitted for the StormCon 2016 Proceedings.
Give Me the Numbers: How Trees and Urban Forest Systems Really Affect Stormwater Runoff (Presentation Notes)
Presentation notes from presentation given by Aarin Teague and Eric Kuehler at StormCon 2016 Annual Conference in Indianapolis, IN on August 23, 2016.
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