The specifications for most construction project are filled with seemingly endless phrases of precision such as “not less than 100 percent maximum density,” “no variation greater then ¼,” “shall be at least .005 in thickness,” “minimum strength of 3,000 psi,” etc. Why is this? Buildings, bridges, roadways, utilities, and the like are all intended to… More
Through my work with DeepRoot, I’ve come to love and appreciate trees – especially urban trees – in a way that I never anticipated, so much so that I recently became a certified arborist. But my greatest love, since I was very little, was for animals. There is an intersection between these two interests, of… More
This post is now out of date! Please see the updated post here. In the day-to-day, we can become so focused on what isn’t working with the way we design and plant street trees that it can be difficult to focus on the people and places that are actually doing right by them. It’s just so… More
I read a lot of news stories about development projects described by words like sustainable, walkable, dense, and multi-use. These characteristics are experiencing a real surge in emphasis from both a design standpoint and from media coverage, and rightly so. They are some of the pillars of community design that support the physical and economic… More
To kick off 2012, we’re reprinting this great post written by Matthew Gordy for the Boston Society of Landscape Architects back in April 2011. One thing I love about this post is the theme of high performance. We plan and expect for high performance with other types of utilities and urban infrastructure because we want… More
Community-based tree care organizations are a critical component of tree longevity in many cities and towns. These organizations provide training for volunteers to become advocates and stewards of trees in their neighborhoods. At Tree Pittsburgh, a non-profit in Pittsburgh, PA, this program is called Tree Tenders. Last week I talked to Tree Tender Nicole Moga…. More
Community-based tree care organizations are a critical component of tree longevity in many cities and towns. These organizations provide training for volunteers to become advocates and stewards of trees in their neighborhoods. At Tree Pittsburgh, a non-profit in Pittsburgh, PA, this program is called Tree Tenders. There are nearly 1,000 Tree Tenders volunteers in the… More
Most urban trees in North America are planted in inadequate soil volumes and other inhospitable conditions that doom them to premature decline and death, meaning that we rarely capture their full ecological utility or enjoy their beauty. But, there are exceptions to every rule, and street trees are no different. Indeed, some trees planted in urban areas… More
As an urban trees and soils consultant, I am always looking for studies that examine how trees survive and adapt to the built environment. One of the biggest questions and confusions I encounter is the issue of whether organic matter (something that I discussed in a previous post) needs to be added to urban… More
Part 1 of this blog series summarized recent studies in Minnesota, Connecticut, New Hampshire, and King City, Ontario, which all found that the difference between summer and winter performance of bioretention systems is not substantial, even on sites with severe winters. Now that we know that, how do we go about maximizing bioretention performance in… More
You don’t need much experience in arboriculture or landscape design to notice that planting trees in cities is very different from planting trees in forest environments. There are many reasons for this, but perhaps the biggest is the difference in composition of the soil.
Research to date has shown that bioretention can be effective for water quality treatment and for preserving the pre-development hydrologic function of a site, but what happens when air temperatures dip below freezing? Studies indicates that with proper design and maintenance, bioretention can function well even in cold climates.
Soil. Stormwater. Sustainable Infrastructure.
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