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New Green Economy Final 1 20 2010
 

New Green Economy Final 1 20 2010

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Slides presented by Mark Woolbright in Washington, DC.at the USGBC headquarters on 1-20-2010

Slides presented by Mark Woolbright in Washington, DC.at the USGBC headquarters on 1-20-2010

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    New Green Economy Final 1 20 2010 New Green Economy Final 1 20 2010 Presentation Transcript

    • Similarities Between Green Walls, Green Roofs and the Research That Keeps Them Moving Forward By Michael Furbish of Furbish Company, LLC Mark Woolbright of Greenwall Ventures, LLC
    • Your eye goes right to the Green Wall in this picture, doesn't it.
    • Could you imagine a solid concrete wall here instead?
    • Annuals and perennials mixed for great aesthetics.
    • A 54 foot tall slope hidden in there by vegetation!
    • Green walls are easy on the eyes.
    • Hardy natives offer various growth habits that obscure th lines of an improved area whi restoring needed habitat.
    • The right plant in the right place can have awesome results that last.
    • Green Wall 101 • What constitutes a “green wall”? • Our intended definition of a green wall. • History of green walls starting in Europe and why. • Why has St. Louis been one of the only green walls markets in the United States? • Other green wall markets in the United States. • Green walls are a conceptually different way to manage grade changes. • Effects of regionalized product availability and no consistent message or information portal. • Benefits and applications of green walls are similar to green roofs but in need of published data.
    • This is Hardscape and it is everywhere. Can Green Walls begin to overtake them as the mainstream , rather than the niche?
    • Hardscape vs. Landscape Conventional retaining wall vs. Vegetated retaining wall
    • Aesthetically attractive alternative to hardscape Vegetated Retaining Wall Conventional Retaining Wall
    • The “big” questions! • Why do you want it green? • How do you get it green fast? • How do you keep it green? • Does it require maintenance and if so, is it intensive? • Does it have benefits beyond just holding back an embankment?
    • Solid concrete walls are not as easy on the eyes.
    • Why Choose A Green Retaining Wall Over A Traditional Retaining Wall A green retaining wall minimizes the impact of a needed structure while increasing “green space” lost in development.  A green wall reduces the “Heat Island” effect by moderating fluctuations in temperatures at and near the structure day and night.  A green wall is another stormwater management tool as they help reduce surface water runoff and filter pollutants from the water and air around it.  A green wall can be a key component in a sustainable development plan and signifies an awareness of the need to make a difference.  A green wall is cool on the eyes, reduces glare and may increase worker productivity as it fosters a greater sense of well-being.
    • •Green walls minimize the Impact of large structures.
    • A Green Wall Is:  A water treatment plant  An air filtration plant  A storm water management tool  An energy conservation tool  A low impact development tool  A capital savings tool  A habitat  A worker productivity tool  A public relations tool  A sales tool  A noise reduction tool
    • Green Walls start out pretty boring And end up pretty exciting.
    • Just planted with hardy vines and junipers.
    • Same wall after 3 years of growth.
    • Just planted with Sedum like a green roof would utilize.
    • Same wall after 2 years of growth.
    • Project Notes: The completed Reinforced Soil Slopes were dusted with Topsoil and spray seeded with hearty native plant material. Construction Phase
    • Project Notes: The vegetation will require NO maintenance and serves to minimize the impact of these large cost effective structures. Completed project the next year.
    • Roadway Slope Disappears into Habitat Before After
    • Thermal Performance of Biowalls B. Retzlaff1, D. Gerstenecker1, L. Richter1, and M. Woolbright2 Southern Illinois University Edwardsville1, Green Wall Ventures2 ABSTRACT Eighteen circular (7-foot diameter) green walls (donated by Hercules Manufacturing of St. Louis) have been located on the SIUE campus. The project is designed to evaluate the plant growth and performance of five Sedum species and one unplanted wall on north, south, east, and west wall aspects. In addition, the temperature of the wall, growing RESULTS G re e n W a ll T e m p e ra tu re s 1 0 /3 0 /0 8 G re e n W a ll T e m p e ra tu re s 0 4 /0 3 /0 9 medium, and plant surfaces have been monitored on the same north, south, east, and west wall aspects. One of the Sedum species ('Bertrum Anderson') did not survive the first year of the study and we have replaced this species with mixed Sedum plugs. Walls planted with Sedum spurium and Sedum phedimus have approximately 75% growth media 30 100 coverage after one year. Further, plant surface temperatures are less than wall block surface temperatures while the growing medium (Ameren Bottom Ash) has the greatest P la n ts B lo c k s M e d iu m P la n ts B lo c k s M e d iu m surface temperature. North and east wall aspects have the lowest afternoon surface temperatures - more than 25 degrees F lower than west and south aspects. Our data 25 80 indicates that living wall systems have the potential to reduce the urban heat flux and that species selection may impact the thermal benefit. T em perature ( F) T em perature ( F ) 20 o o 60 15 40 10 20 5 INTRODUCTION 0 0 tro l nche n m d im u s spp. riu m tro l nche n a tic u m d im u s spp. riu m C on a tic u Phe um Spu C on Phe um Spu e rg ru ts c h Sed e rg ru ts c h Sed Im m Kam Im m Kam Green (living) walls may be used to help cool cities and reduce the Urban Heat Island Effect. When the plants of a green wall grow to maximum G re e n W a ll T y p e G re e n W a ll T y p e coverage, their shade and evaporation should help to reduce the amount of heat that would have been absorbed by the wall material. Evaluation of Fig. 2 Fig. 3 the biowalls planted at SIUE is needed to determine which plant species provide the greatest thermal benefits. This study evaluated the surface temperatures of 4 different Sedum species walls, a mixed Sedum species wall, and a control wall with no plant species. Our hypothesis was that Mean temperatures of the plants, medium, and blocks per species in the months of October, 2008 planted walls would have lower surface temperatures than unplanted walls. and April, 2009). G re e n W a ll T e m p e ra tu re s o n S o u th A s p e c t 1 0 /3 0 /0 8 G re e n W a ll T e m p e ra tu re o n S o u th A s p e c t 0 4 /0 3 /0 9 SIUE PROJECT MATERIALS AND METHODS 50 P la n ts B lo c k s M e d iu m 120 P la n ts B lo c k s M e d iu m A 40 A A 100 Green Wall Setup – 3 replicates of 6 Green Walls each planted with one of four Sedum species, one with no plants (the control wall), and one with B C B A B mixed Sedum plug in a completely randomized design. (Fig. 1) T em perature ( F ) B C Tem perature ( F) 80 o o 30 C C Green Wall Species - Sedum immergrunchen, Sedum kamshaticum, Sedum phedimus, and Sedum spurium 60 The mixed Sedum species wall included S. spurium, S. sexangulare, S. cauticola, S. 20 40 kamshaticum, and S. album 10 Green Wall Medium - Bottom Ash mixed with composted pinebark donated by Ameren UE (Retzlaff et al., 2008) 20 Green Wall Blocks - Donated by Hercules Manufacturing of St. Louis (Retzlaff et al., 2008) 0 tro l n s p. 0 tro l n m s spp. riu m C on nche a tic u m d im u m sp riu m C on nche a tic u d im u Spu e rg ru ts c h Phe u Spu e rg ru ts c h Phe um Project monitoring – wall surface temperatures on the north, south, east, and west aspects were taken monthly for 8 months. We began in Im m Kam G re e n W a ll T y p e Sed Im m Kam G re e n W a ll T y p e Sed September of 2008 and concluded in April 2009. An infrared thermometer was used to collect temperatures at the same time each afternoon. A Fig. 4 Fig. 5 one way ANOVA for a completely randomized design was used to test for differences between treatments. A Tukey’s post-hoc test was then used to rank differences at an alpha level of 0.05 (Proc GLM, SAS version 9.1) Mean temperatures of the plant species, growth medium, and blocks per species from the South aspect for the months of October and April. DISCUSSION G re e n W a ll T e m p e ra tu re s o n N o rth A s p e c t 1 0 /3 0 /0 8 G re e n W a ll T e m p e ra tu re s o n N o rth A s p e c t 0 4 /0 3 /0 9 Significantly different temperatures for the control walls and species planted walls are a desirable outcome for living wall systems. The plant and medium 20 60 can act together as a thermal unit that provide a cooling layer to building material (Sidwell et al., 2008). The study of these thermal environments are to P la n ts B lo c k s M e d iu m P la n ts B lo c k s M e d iu m determine how great the benefits in temperature reduction are per plant species throughout changing atmospheric temperatures. This study helps to 15 a 50 promote the idea that green walls can reduce the effects of the Urban heat Island caused by development. The coverage of a plant has a direct correlation a T em perature ( F ) a A Tem perature ( F ) 40 A o o B with the temperature of the medium and block it is placed in. The greater the coverage of the species the lower the temperatures the medium and block A A B b A B b 10 30 should be. The dark surface of the medium heats up, but with maximum growth, the plant should provide shade and reduce the amount of heat absorbed. B The coverage and maximum growth can influence the temperature, and help provide optimal thermal benefits (Koehler et al., 2006). The ability of the 20 living wall to collect rainwater and the process of evaporation are also factors that may lead to cooling of the building material (Koehler et al.,2006). More 5 10 studies are needed to determine how great an influence biowalls can have on the surrounding thermal environment. 0 0 tro l nche n a tic u m d im u s spp. riu m tro l nche n a tic u m us spp. m C on Phe um Spu C on Phe d im m Spu riu e rg ru ts c h Sed e rg ru ts c h S edu Im m Kam Im m Kam G re e n W a ll T y p e G re e n W a ll T y p e Fig. 6 Fig. 7 Fig. 1 Mean average temperatures of the plants, medium, and block per species from the North aspect fort he months of October and April. (Medium with different grouping letters are statistically different from one another) SIUE PROJECT CONCLUSIONS Average green wall surface temperatures are not statistically different in October or April (Fig. 1, 2). The North aspect stayed significantly cooler than the South aspect in April and October (Fig. 4,6; Fig. 5,7). Planted biowalls have a lower growth medium temperature than unplanted walls in October 2008. REFERENCES: Sidwell, A., Gibbs-Alley, J., Forrester, K., Jost, V., Luckett, K., Morgan, S., Yan, T., Noble, B., and Retzlaff, W.,2008. Evaluation of the thermal Benefits of Green Roof Systems. Koehler, Dr. Manfred, 2006. Living Wall Systems- A View Back and Some Visions Retzlaff, W., J. Middleton, M. Woolbright, V. Jost, S. Morgan, and K. Luckett. 2008. Evaluating the performance of the Ecoworks living wall system. Proceedings Sixth Annual Greening Rooftops for Sustainable Communities Conference, Awards, and Trade Show (available www.greenroofs.org).,Baltimore, MD.
    • How about a simple, space efficient urban garden.
    • Unlike green roofs, the media is “in the face” and greatly “behind the face.” This fact presents the greatest challenge in design but the greatest benefits to site development and the environment once good laboratory data is published..
    • Site water runoff
    • Site water runoff for capture in slope backfill zone
    • 18 test walls are being set up at the SIUe field site so Dr. Bill can start “killing” plants for our first trial series.
    • Before the plants are added to the study walls.
    • Dr. Retzlaff hard at work planting the walls.
    • The next season with growth and a view of one of the controls walls that was not planted.
    • Spring in Atlanta, GA. test trial wall.
    • Summer in the same wall! Trials like this make it easy to identify the species that give thermal cover.
    • Thank you for attending our presentation!