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Urban Forest Canopy

Context Sensitive Design is a new approach in transportation planning that recognizes community values. Roadside vegetation and green spaces are often valued features of transportation corridors. This site lists studies that investigate of public values regarding trees and vegetation in urban vehicular use areas.

USA Today - Some cities are finding money does grow on trees

Cities are starting to treat trees less as decoration and more like public utilities now that they can calculate how much money trees save by cutting air pollution, storm runoff and energy costs.

Center for Watershed Protection - Urban Wateshed Forestry Manual

Three-part guide to urban forestry for watershed protection and restoration:

Part 1: Methods for Increasing Forest Cover in a Watershed.

Part 2: Conserving and Planting Trees at Development Sites.

Part 3: Urban Tree Planting Guide

USDA Forest Service - Center for Urban Forest Research

Resources on Urban Forestry

International Society of Aborculture - Tree Ordinance Guidelines

Model Ordinances

Urban Trees & Air Quality I

A great summary of the effects of urban trees on air quality.

Urban Trees & Air Quality II: Mortality and Morbidity Benefits of Air

The grim title of this report belies the richness of its summary research.

Urban Trees and Air Quality III: Study of West Midlands England

Examined the urban West Midlands region of England (900 km2, population 5.3 million) and estimated that doubling the number of urban trees would lower atmospheric particle concentrations by 25% and reduce related-human mortality by 140 people a year.

Urban Forest Canopy Report in Portland, Oregon, 1972-2002

By Joe Poracsky and Michael Lackner. Documents a slight but consistent increase in forest canopy within the City of Portland over the 30 years with some significant increases and declines in forest canopy at the neighborhood scale. General increases in older neighborhoods may be directly related to tree planting efforts. Another interesting and useful outcome of this study was suggested targets for forest canopy recovery in residential and commercial neighborhoods.

Urban Ecosystem Analysis

An urban ecosystem analysis completed by American Forests in October of 2001 documented the net loss of urban tree cover in the Portland-Metro Region between 1972 and 2000.

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