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Trees and Stormwater Runoff (Green Stormwater Infrastructure)

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).

Gravel Bed Stormwater Detention System for Growing Trees in Extra-urban Areas
The purpose of this demonstration project was to show the potential of an inexpensive, gravel-based stormwater detention system to store water for use by trees in ultra-urban areas without sacrificing needed parking space. read more...
Gravel Bed Stormwater Retention System - Greenhouse Demonstration Project
This project was conducted to better understand below-ground tree root morphology in gravel-based stormwater retention systems. read more...
Clarkesville Green Infrastructure Implementation Strategy
This report was developed under USEPA Contract No. EP-C-11-009 as part of the 2014 USEPA Green Infrastructure Technical Assistance Program. read more...
A Green Infrastructure Guide for Small Cities, Towns and Rural Communities
The purpose of this Guide is to support small cities, towns and rural settlements with the integration of green infrastructure into their communities. Much of the current green infrastructure research and guidance focuses on densely populated urban centres. Smaller and rural settlements are often ... read more...
Ahead of the Curve – Implementing Green Infrastructure in Rural and Growing Communities
This webcast will showcase two communities, Monona, Iowa and Clarkesville, Georgia, that are ahead of the curve in using green infrastructure to address some of their stormwater management challenges.
Evaluation of Natural Green Infrastructure for Watershed Planning in the City of Atlanta
This white paper describes a Preservation Evaluation Tool used to assign an evaluation score to a particular area of preservation or restoration interest and a watershed model used to understand the water quality benefits provided by natural GI and the City’s tree canopy. This tool was developed by ... read more...
Urban Forest Systems and Green Stormwater Infrastructure
The purpose of this draft document is to focus on the research-based effects of trees on urban stormwater runoff, provide some helpful urban forest management strategies to maximize stormwater benefits, and demonstrate several examples around the United States where the stormwater benefits of urban ... read more...
Capture the Rain and Rebuild the Economy: It Can Happen Here!
This fun animation shows how reconnecting trees to our city's watersheds is one of the fastest ways to create lasting jobs while rebuilding local economies and preparing our communities to thrive and survive increasing threats of severe weather.
Accounting for Trees in Stormwater Models
This paper is intended to help the stormwater engineering community more easily account for trees in runoff and pollutant load calculations so that they can more readily incorporate them into their stormwater management strategies.
Gray 2 Green (G2G) Decision Support Tool
A decision support tool for transitioning to vegetation-based stormwater management
Investigating the Stormwater Quantity and Quality Impacts of Urban Trees
This 2 hour presentation/panel discussion highlights ongoing research projects that will help environmental managers assess the stormwater volume reduction potential of urban trees as well as understand how municipal leaf collection and street cleaning programs can limit the amount of nutrients in ...
Trees and Stormwater Calculator Tool
The Trees and Stormwater Calculator Tool is intended to simulate the impact of increasing or decreasing urban tree canopies upon stormwater runoff yield.
More Than Good Looks: How trees influence urban stormwater management in green infrastructure practices
In this webinar, Andrew Tirpak discusses recent research results from studies designed to characterize the health of trees in bioretention practices and the benefits they provide to urban stormwater management. Lyn Rutherford shares observations from managing bioretention and detention ponds in ...
Integrating a canopy interception spreadsheet tool with WinSLAMM for site stormwater design: potential water quantity and quality benefits
This presentation was given by Dane Wudel at the pre-conference workshop for the Center for Watershed Protection Annual Conference in Charleston, SC. It reviews a spreadsheet tool developed to show how tree canopy cover modifies rainfall volume that can be fed into the WinSLAMM model.
Filling a Need: Developing training for stormwater managers about the influence of trees on urban stormwater
This presentation was given by Charles Barden at the pre-conference workshop for the Center for Watershed Protection Annual Conference in Charleston, SC. This presentation reviews the results from a Stormwater Manager survey assessing the need for training and materials to help them use urban trees ...
Digging into the data: unraveling the influence of urban trees on stormwater quantity and quality
This presentation was given by Trisha Moore at the pre-conference workshop for the 2019 Center for Watershed Protection Annual Conference in Charleston, SC. It shows some of her preliminary results from a meta-analysis done on the most current trees and stormwater research.
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 Goes Green: The Benefit and Health of Trees in Green Stormwater Infrastructure (view webcast)
View the on-demand webcast for this presentation
Making Urban Trees Count: Stormwater Performance Based Credit Calculator
CREDITING FRAMEWORK PRODUCT #6 of Making Urban Trees Count: A Project to Demonstrate the Role of Urban Trees in Achieving Regulatory Compliance for Clean Water read more...
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