Quotes

Compaction and Sand-Based Structural Soil (SBSS)

There are many factors that contribute to the failure of urban trees, and many are related to soil issues, such as lack of viable soil, soil volume, and compaction. For my entire career, Landscape Architects have been working with Soil Scientists, Engineers, and Arborists to design urban tree planting techniques to meet specific horticultural, structural,… More

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Tree Watering Bags: Are They Worth Using?

In the July 2019 issue of ISA Arboriculture & Urban Forestry magazine, Hossain, Stuhlinger, Olson, and Babst contributed, “A Comparison of Indirect Water Devices for Benefiting Newly Transplanted Urban Trees.” Urban trees often undergo a period of post-transplant stress which is exacerbated by a water-limited environment. Watering devices are available to help a newly planted… More

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Treating Hydrocarbons with Green Infrastructure

I’ve always believed in nature’s processes to manage compounds in the environment. Even as a young undergraduate engineer, I often wondered why we are removing natural systems like trees and soil rather than working with them, why we weren’t protecting and bolstering those systems in ways that enhanced their natural mitigating processes. The (relatively) recent… More

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Green Infrastructure and the 3 Cs: 300 Front St. Case Study, Toronto

Creating a Standard for a Green Infrastructure Sidewalk This is the first of a series of five posts featuring case studies that illustrate the need for a paradigm shift for how streets and sidewalks are designed and constructed. This new paradigm for Green Infrastructure is based on Creativity, Collaboration, and Compromise (CC&C), and is demonstrated… More

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Long-Term Use of Bioretention for Heavy Metals Removal

Bioretention has been shown to effectively remove heavy metals from stormwater runoff, which makes it a very useful design tool. However, there are two common concerns related to long term use of bioretention for heavy metals removal: (1) When will breakthrough occur, i.e. when will the binding sites be saturated so that dissolved heavy metals… More

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The Importance of Soil Structure

Soil structure (how soil particles are held together to form larger structures within the soil) is recognized as an important property of a healthy soil. Grading, tilling, soil compaction and screening soils during the soil processing and mixing process damages structure.  To counteract the loss of structure, specifiers then add to it, utilizing a mined… More

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Speaking for the Trees: Getting to Know Diana Beresford-Kroeger

If you love trees but aren’t familiar with Diana Beresford-Kroeger, it’s time to acquaint yourself with her work.  A botanist, medical biochemist, author, and activist, her background combines western scientific training with traditional folk-knowledge and methods. Perhaps her strongest talent is her ability to bring an understanding and appreciation of the scientific complexities of nature… More

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