Guide to Green Roofs for Wastewater Treatment: A Vietnam Perspective

Green roofs can be defined as “contained” green spaces on top of artificial structures and are considered a nature-based solution to prevent several environmental and socio-economic problems associated with urban sprawl and climate change. A green roof system contains a high-quality waterproofing membrane and root barrier system, a drainage system, filter fabric, a lightweight growing medium, and plants. Green roof systems can be modular layered systems already prepared in trays, including drainage layers, growing media, and plants, or each component of the system can be installed separately on top of the structure. With its inherent strengths, green roofs have been applied more and more widely in urban areas. This chapter shows significant information such as basic elements, pollutant removal mechanisms, and benefits associated with green roofs, as well as offer technical instructions to install a green roof system and operation and maintenance procedures that ensure the longevity of the system. Using this guide, the users know how to select the type of plant, prepare materials, etc., to install a green roof system. Besides, the users also get a more comprehensive understanding of implementation and maintenance issues.