Sure, you may already know the answer to the question of how trees transport water up to such incredible heights. But this video from Veritasium is still worth it. It explains principles I didn’t even realize existed (water can only rise about 10 meters when sucked through a tube?) and makes a very compelling case… More
If you’re a contractor interested in installing a Silva Cell project, don’t be misled in thinking that you must have prior Silva Cell experience. Below is a copy of the section of the DeepRoot Standard Specifications for Silva Cells that relates to Installer Qualifications. Although this exact wording may not be used in all cases,… More
Need a lively discussion topic for the dinner table, a road trip, or a hot date? How about stormwater credits for trees?! A group of us started discussing the intricacies of how to set up a stormwater credit system for trees two summers ago, only to discover that the subject was even more “interesting” (both… More
Toronto has one of the most ambitious urban forestry plans in North America. In addition to setting minimum soil volumes for street trees of 30 cubic meters (1,059 cubic feet) per tree, they have set a goal of increasing their overall tree canopy from 17 percent to 40 percent. In 2007, the Bloor-Yorkville Business Improvement… More
We spend a lot of time at DeepRoot talking about the big picture of “green infrastructure,” but in order to assist in creating viable and sustainable urban eco-systems, we must actually produce products. Plastic products.
Ancient survivor This tree (Pandanus tectorius) has many names, including Hala and Screw-pine, but my favorite is Tourist Pineapple, because the fruits fool unsuspecting visitors. This primitive plant is found in fossil records all over the world, including as far away as Europe. It was assumed to be an introduced plant in Hawaii until a… More
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
Today’s blog entry is reprinted testimony from Dr. Franco Montalto, PE, given to the New York State Assembly Standing Committee on Environmental Conservation at a public hearing on the environmental causes and effects of extreme weather events. The testimony was given on January 13th, 2013 and originally appeared on SwimmableNYC’s blog. Dr. Montalto is an… More