Green Roof

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Abstract

With the acceleration of urbanization, forests, agricultural fields, and suburban lands are replaced with impervious surfaces. Thus, it is of great necessity to recover green space in city, so as to maintain environmental quality. Green or vegetated roof is a potential remedy for this problem. Indeed, establishing vegetation on rooftops can provide numerous ecological benefits, including retention of storm water, mitigation of the urban heat island effect, carbon dioxide reduction, pollution reduction, noise reduction, and biodiversity enhancement. Besides, the green roof is an efficient measure to improve the energy performance of the building. A mathematical model for vegetated soil, which aims to estimate the foliage and soil surface temperature as well as its dynamic thermal behaviors, has been established. By providing detailed soil and foliage properties and meteorological conditions, the vegetation model can well predict the soil surface temperature and heat flux. Benefit-cost analysis is described for its economic value that green roof can be competitive when social benefits are included, where localities policies and funding strategies might be necessary. The green roof needs a proper design to achieve its best values. It is of great significance to determine the roof purpose, consider the roof bearing load, design the roof components, and choose proper plants.

Keywords

Green roof Biological benefits Thermal properties Energy performance Economic analysis Design 

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Copyright information

© Springer-Verlag GmbH Germany 2018

Authors and Affiliations

  1. 1.Institute of Building Environment and EnergyChina Academy of Building ResearchBeijingChina
  2. 2.Institute of Refrigeration and Cryogenics of Zhejiang University/Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang ProvinceHangzhouChina

Section editors and affiliations

  • Hua Qian
    • 1
  1. 1.School of Energy and EnvironmentSoutheast UniversityNanjingChina

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