Title of Document: INVESTIGATING CRUMB RUBBER AMENDMENTS FOR EXTENSIVE GREEN ROOF SUBSTRATES Sonia Lorelly Solano Torres, MS, 2010 Directed By: John D. Lea-Cox, PhD. Chair, Plant Sciences and Landscape Architecture Department Extensive green roof systems can mitigate urban stormwater by capturing rainfall and reducing runoff volume. Green roof substrates, often made from expanded shales, slates...

Urbanization leads to higher phosphorus (P) concentration in urban catchments. Among different stormwater retention measures, green roofs are the least efficient in phosphorus retention. Moreover, much research has shown that green roofs act as sources of phosphorus, and they can emit P in significant loads. In this study low P emission green roof substrate was developed based on the proposed s...

Green roofs have the potential to function as islands of biodiversity within urban and suburban environments. However, plant diversity is constrained by the harsh environment of a green roof, especially summertime water deficit and heat stress. We hypothesized that Sedum species, which are highly tolerant of the roof-top environment, would reduce peak soil temperature and increase performance o...

Urban land area in the United States is projected to increase to 8.1% of total land area by the year 2050. These human-dominated environments create conditions that degrade both terrestrial and aquatic ecosystems. If cities are to reduce their environmental impact, innovative practices must be developed that replace ecosystem services lost during the urbanization process. This study evaluated t...

To educate the Purdue community and general public about the environmental benefits of green roofs, the Boiler Green Initiative (BGI) installed Tippecanoe County’s first green roof on Purdue’s campus in May 2009. The extensive green roof is approximately 165 m and consists of vegetation and pavers to make the space an aesthetically pleasing, usable environment. A monitoring system records surfa...

Global warming has become a threat of our time. It poses challenges to the existence of all biota on this earth and has made a clear impact on the level of energy and water consumption. No doubt, increase in the ambient temperature increases indoor and outdoor temperature level of the buildings which catalyzes the use of energy and cost intensive mechanical air-conditioning systems. Green roof ...

A two-stage physically-based detention model has been developed for green roof systems. Vertical flow in the substrate is represented by Richards equation, and horizontal underlying drainage layer modeled Saint Venant equation. This (2SPB) stormwater management (SWMM) low impact development control (SWMM-GR) were validated using measured runoff profiles from two contrasting systems: a conventio...

A three dimensional numerical wind tunnel based on the Navier-Stokes equations for viscous, incompressible fluid and LES method is established. Incoming wind field is generated based on the AIJ guidelines (2004). The numerical wind tunnel is validated against experimental results. A low-rise building with green roof is tested in the numerical wind tunnel. The results show that the green roof re...

green roofs are a part of efforts to make the cities more sustainable and it is one of the modern solutions for urban problems. the physical development of cities led to loss of the natural environment. therefore, the development of green spaces plays an important role in human life. in order to evaluate the effect of some culture media on yield of “oenothera speciosa rosea” in green roof situa...