Varying Shades of Green: Selected Experience and Research on Green Roofs Garvue

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Varying Shades of Green: Selected Experience and Research on Green Roofs Garvue

  1. 1. Varying Shades of Green: Selected Experience and Research on Green Roofs <ul><li>Dena Rae Garvue, Director of Horticulture, Bernheim Arboretum & Research Forest </li></ul>
  2. 2. Green Roof Evaluation Program <ul><li>Identify a diverse palette of plants suitable for GRs. </li></ul><ul><li>Everything is apart of something bigger. </li></ul><ul><li>Making GRs accessible makes them more relevant & strengthens community relations. </li></ul><ul><li>How to better incorporate sustainable practices in design and construction. </li></ul>
  3. 3. Bernheim Arboretum and Research Forest
  4. 5. connecting people with nature
  5. 6. Canopy Tree Walk & Overlook
  6. 12. CONNECT – where nature, art & science connect at Bernheim
  7. 13. Bernheim Arboretum & Research Forest <ul><li>14,000 acre research forest ; 7 plant communities </li></ul><ul><li>white oak / chestnut oak; white oak / black oak; chinquapin oak; beech / sugar maple; Virginia pine; sycamore; grasslands </li></ul><ul><li>847 plant species (685 native species) </li></ul><ul><li>34 mammals, 211 birds, 17 reptiles, 31 amphibians, 19 fish, and 227 insects. </li></ul><ul><li>600 acre arboretum ; 8,000 accessions representing </li></ul><ul><ul><li>114 plant families, 406 genera, 1,182 species </li></ul></ul>
  8. 18. Bernheim Select Landscape Plants <ul><li>Plants with superior ornamental and ecological values, durability and adaptability to north-central Kentucky’s climate, soils and other environmental factors. </li></ul>
  9. 19. BERNHEIM VISITOR CENTER Strategies and Construction: <ul><li>Connected to Place : People and nature can coexist in healthy, sustainable communities. Everything is part of something bigger. </li></ul><ul><li>Existing trees and landscape were protected during construction. </li></ul><ul><li>Oyster mushrooms ( Pleurotus ostreatus ) clean parking lot runoff. </li></ul><ul><li>“ Heat Island” effect is minimized by the green roof and shading of walkways. </li></ul>
  10. 20. BERNHEIM VISITOR CENTER Strategies and Construction: <ul><li>Conserving Water : Water sustains life. Water, air and soil are resources to value and conserve. </li></ul><ul><li>The Visitor Center reuses roof water and purifies runoff through a peat filtration/treatment system. </li></ul><ul><li>The green roof reduces storm water runoff. </li></ul><ul><li>Primarily native plants are used in the landscaping. </li></ul>
  11. 21. BERNHEIM VISITOR CENTER Strategies and Construction: <ul><li>Energy Efficiency : Energy flows through all living systems. </li></ul><ul><li>Energy efficiency and renewable energy sources were chosen when possible. </li></ul><ul><li>By using a geothermal heating and cooling system and incorporating a green roof system, the use of non-renewable polluting energy sources is reduced. </li></ul>
  12. 22. BERNHEIM VISITOR CENTER Strategies and Construction: <ul><li>Materials and Resources : Building materials have an environmental cost and a life span. </li></ul><ul><li>The building was built to come apart allowing materials to be used again. </li></ul><ul><li>Materials were acquired from nearby sources, minimizing transportation. Recycled material was used to build this building, and trees were planted to replace harvested wood. </li></ul>
  13. 27. Green Roof Plant Evaluation Program <ul><li>To identify plants that exhibit exemplary green roof performance. </li></ul><ul><li>Measure the physical growth, aesthetic appeal & environmentally friendly traits: </li></ul><ul><li>Non-invasive </li></ul><ul><li>Conserve biological diversity and benefit wildlife </li></ul><ul><li>3 (F) categories: foliage, flower and fruit – bloom period and seasonal interest </li></ul><ul><li>Ease of culture and cultivation </li></ul><ul><li>Drought tolerance / low water use </li></ul><ul><li>Weather tolerance - tolerates climate extremes </li></ul><ul><li>Insect and disease resistance </li></ul>
  14. 28. Green Roof Plants Test Plants <ul><li>(8 taxa) Grasses : Fescue, Helictotrichon, Eragrostis, Hakonechoa, Pennisetum, Schizachyrium, Sporobolus </li></ul><ul><li>(23 taxa) Rock Garden : Allium, Amsonia, Arabis, Arenaria, Aster, Calaminta, Cerastium, Delosperma Dianthus, Gaillaridia, Lavendula, Oenothera, Phlox, Saponaria, Salvia, Scabiosa, Thymus </li></ul><ul><li>(12 taxa) Kentucky Cedar Glade : Eryngium , Manfreda , Opuntia , Pysostegia , Pycnanthemum , Ratibida , Schizachyrium, Sedum , Solidago , Sorghastrum , Sporobolus , Liatris , </li></ul><ul><li>(12 taxa) Sedum </li></ul>
  15. 30. Green Roof Platform #1 CM1 - 4 Rock Garden Green Roof Platform #5 CM2 – 2 Sedum Green Roof Platform #9 CM1 – 1 KY Cedar Glade Green Roof Platform #2 PM – 1 KY Cedar Glade Green Roof Platform #6 CM2 – 4 Rock Garden Green Roof Platform #10 CM2 – 3 Grass Green Roof Platform #3 CM1 – 2 Sedum Green Roof Platform #7 PM – 4 Rock Garden Green Roof Platform #11 PM – 3 Grass Green Roof Platform #4 CM2 – 1 KY Cedar Glade Green Roof Platform #8 PM – 2 Sedum Green Roof Platform #12 CM1 – 3 Grass
  16. 59. Acknowledgments
  17. 60. Acknowledgements (continued) <ul><li>Nana Lampton, CEO </li></ul><ul><li>American Life & Accident Ins. </li></ul><ul><li>Louisville, Kentucky </li></ul>
  18. 61. tREe GENERATION

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