An experimental study of greywater irrigated green roof systems in an arid climate
Article
Article Title | An experimental study of greywater irrigated green roof systems in an arid climate |
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ERA Journal ID | 211441 |
Article Category | Article |
Authors | Chowdhury, Rezaul K (Author) and Abaya, Jameelu S. (Author) |
Journal Title | The Journal of Water Management Modeling (JWMM) |
Journal Citation | 26 (C437), pp. 1-10 |
Number of Pages | 10 |
Year | 2018 |
Place of Publication | Canada |
ISSN | 2292-6062 |
Digital Object Identifier (DOI) | https://doi.org/10.14796/JWMM.C437 |
Web Address (URL) | https://www.chijournal.org/C437 |
Abstract | Green roofs provide multi-functional benefits to the built environment. They minimize urban heat island effects, enhance biodiversity, reduce carbon footprints, provide hydraulic benefits to urban runoff, and improve overall environmental sustainability. However, their application is limited or rare in arid climates. On the other hand, greywater is becoming a popular alternative water resource in water-scarce regions. A greywater-fed green roof system was developed and studied in the city of Al Ain, United Arab Emirates (UAE). The effluent (treated greywater) from the green roofs can be used to irrigate amenity plantations. Two intensive and two extensive green roof prototypes were constructed, planted with reed canary grass (Phalaris arundinacea L.), and irrigated with greywater. The greywater influents and the green roof effluents were monitored for changes in greywater quality. The study showed that the intensive system performed well, which is attributable to the greater depth of soil media. Treated greywater effluent from the green roofs met the local standards for recycled wastewater-based irrigation for a number of parameters (pH, electrical conductivity, salinity, and total dissolved solids), but exceeded the maximum allowable limits for turbidity, COD, and sodium ions (Na+), which may be because of the short retention time of the experiment. Both the intensive and the extensive systems were inefficient in reducing the total bacterial count of the greywater. |
ANZSRC Field of Research 2020 | 400513. Water resources engineering |
Public Notes | Open Access. Published works will be available to a worldwide audience, free, immediately on publication. JWMM content can be downloaded, printed, copied, distributed, and linked-to, provided full attribution to both CHI and the author is given. |
Byline Affiliations | School of Civil Engineering and Surveying |
United Arab Emirates University, United Arab Emirates | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q49w5/an-experimental-study-of-greywater-irrigated-green-roof-systems-in-an-arid-climate
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