Quotes

Tree Roots Improve Soil Infiltration Rates

As discussed in previous blogs, tree and soil provide stormwater benefits in many different ways: Cleansing:  Trees clean stormwater through many different mechanisms, including filtration, adsorption, and plant uptake. Interception: Interception is the amount of rainfall temporarily held on tree leaves and stem surfaces. This rain then drips from leaf surfaces and flows down the… More

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How Does Soil Differ Across Earth’s Biomes?

Ecologists group large geographic regions with similar environments and distinctive plant and animal communities into biomes. The environmental factors influencing biomes include latitude, the general climate and topography of the region, and soil. Soil is the foundation of every terrestrial ecosystem. Each biome has soils with characteristics unique to it. 

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The Most Important Factor for Growing Healthy Trees

Many factors affect tree health. Are they all equally important or are some more important than others? According to Kim Coder, PhD, Professor of Tree Biology & Health Care at the University of Georgia, soil compaction is by far the biggest constraint on tree growth. In a 2007 paper, he wrote, “Soil compaction is the most… More

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Silva Cell’s Support 167 trees in Downtown Minneapolis: A Case Study

– Silva Cells solved the 2009 CSO stormwater transition during the Marquette and 2nd Avenue (MARQ2) busway project, mitigating stormwater runoff. – Over 167 trees were installed along 48 blocks of downtown Minneapolis each with 588 ft3 (16.6 m3) of soil volume. – Above ground, the trees provide shade, clean air, and beauty. Below ground,… 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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Green Infrastructure and the 3 C’s: Creativity Collaboration and Compromise

Developing Green Infrastructure in Cities Requires a Paradigm Shift The imperative of dealing with climate change has generated the need for cities to develop “green” infrastructure. The development of green, environmentally ethical, infrastructure needs upstream support from politicians and policymakers to succeed. It also requires fundamental changes downstream to the way plans for streets and… More

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Our Recommended Soil Volume for Urban Trees

We have a lot of resources about implementing minimum soil volumes for urban trees on this blog. Recently we’ve updated our list of municipalities that have a minimum soil volume standard. Trees need an adequate volume of root, oxygen-rich soil to thrive, and minimum soil volume policies are a powerful tool for arborists and other advocates… More

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Silva Cell Case Study in Richmond, Virginia

A 240-year-old market glows with resilient green infrastructure and people-centric design Richmond, Virginia’s 17th Street Farmers Market is the oldest of its kind in the nation, declared a public market in 1779. (Though some accounts claim it started unofficially as early as 1737).  As commerce grew, so did the market, and in 1854 a building… More

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The Role of Trees for Bioretention Areas

Silva Cells were originally developed to provide adequate tree rooting volumes even in areas dominated by pavement. They do this by extending rootable soil volume under HS20 load bearing surfaces. These rootable tree volumes and the large trees that root in them are also an efficient sustainable stormwater management system. Sometimes people ask us if… More

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