This document summarizes research on the performance of green roofs in subtropical climates. The research found that green roofs can provide greater thermal and hydrologic advantages in areas with extreme temperatures and variable rainfall compared to temperate regions where most research had focused. The study measured temperature profiles, water retention, plant response, and water quality on 6 types of green roofs and black and white roofs over 3 years. Results showed high variation in performance among plant species and roof types. Ongoing research is looking at plant establishment, survivorship, and weed control over time to develop optimal native plant mixes for green roofs.
Partnerships: Politics: Process - Building Your Gardens Vision with Community...
Varying Shades of Green: Selected Experience and Research on Green Roofs Simmons
1. Green roofs aren't created equal – the performance of green roofs in a subtropical climate Mark Simmons Lady Bird Johnson Wildflower Center, University of Texas
2. “These particles can cause health problems including asthma, cardiovascular problems, lung cancer and premature death…”
19. climate Research concentrated on temperate latitudes BUT Thermal and hydrologic advantages may be greater where there are extremes of high temperature and stochastic drought-storm events
49. Weeds (grey) F=21.33; P<0.0001 Turf (black) F=10.14; P<0.0001 Native turfgrass mixes have fewer weeds, less water and mowing Simmons, Bertlesen, Windhager & Zafian. (Submitted)
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51. APGA - RESEARCH RESOURCE National-wide research on regional plant suitability using APGA gardens Pilot study present next year at conference Call for applicants
52. APGA - RESEARCH RESOURCE Green roofs Turf grass Green walls Invasive species control using aggressive regional native species
53. Greatest need for regenerated ecosystem services Financial resources ‘Waste’ products can enhance growth High educational value THE URBAN LANDSCAPE ADVANTAGE
