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Publication Type J
Authors Razzaghmanesh, M; Beecham, S; Brien, CJ
Author Full Name Razzaghmanesh, M.; Beecham, S.; Brien, C. J.
Title Developing resilient green roofs in a dry climate
Source SCIENCE OF THE TOTAL ENVIRONMENT
Language English
Document Type Article
Author Keywords Green roof; Water sensitive urban design; Stormwater; Resilient cities; Plant growth index
Keywords Plus AUSTRALIAN URBAN-ENVIRONMENT; STORMWATER MANAGEMENT; VEGETATED ROOFS; QUALITY; PERFORMANCE; BENEFITS; GROWTH
Abstract Living roofs are an emerging green infrastructure technology that can potentially be used to ameliorate both climate change and urban heat island effects. There is not much information regarding the design of green roofs for dry climates and so the aim of this study was to develop low maintenance and unfertilized green roofs for a dry climate. This paper describes the effects of four important elements of green roofs namely slope, depth, growing media and plant species and their possible interactions in terms of plant growth responses in a dry climate. Sixteen medium-scale green roofs were set up and monitored during a one year period. This experiment consisted of twelve vegetated platforms and four non-vegetated platforms as controls. The design for the experiment was a split-split-plot design in which the factors Slope (1 degrees and 25 degrees) and Depth (100 mm, 300 mm) were randomized to the platforms (main plots). Root depth and volume, average height of plants, final dry biomass and ground cover, relative growth rate, final dry shoot-root ratio, water use efficiency and leaf succulence were studied during a twelve month period. The results showed little growth of the plants in media type A, whilst the growthwas significant in both media types B and C. On average, a 90% survival rate of plants was observed. Also the growth indices indicated that some plants can grow efficiently in the harsh environment created by green roofs in a dry climate. The root growth pattern showed that retained water in the drainage layer is an alternative source of water for plants. It was also shown that stormwater can be used as a source of irrigation water for green roofs during six months of the year at the study site. In summary, mild sloping intensive systems containing media type C and planted with either Chrysocephalum apiculatum or Disphyma crassifolium showed the best performance. (C) 2014 Elsevier B.V. All rights reserved.
Author Address [Razzaghmanesh, M.; Beecham, S.] Univ S Australia, Ctr Water Management & Reuse, Sch Nat & Built Environm, Adelaide, SA 5001, Australia; [Brien, C. J.] Univ S Australia, Phen & Bioinformat Res Ctr, Sch Informat Technol & Math Sci, Adelaide, SA 5001, Australia; [Brien, C. J.] Univ Adelaide, Australian Ctr Plant Funct Genom, Urrbrae, Australia
Reprint Address Razzaghmanesh, M (reprint author), Univ S Australia, Ctr Water Management & Reuse, Sch Nat & Built Environm, Adelaide, SA 5001, Australia.
ResearcherID Number Beecham, Simon/M-1544-2016; Brien, Chris/D-5630-2009
ORCID Number Beecham, Simon/0000-0002-9884-3852; Brien, Chris/0000-0003-0581-1817; Razzaghmanesh, Mostafa/0000-0002-0583-1482
Funding Agency and Grant Number Australian Research Council [LD4821]; Goyder Institute for Water Research [PG080214]
Funding Text The authors would like to thank the Australian Research Council (LD4821) and the Goyder Institute for Water Research (PG080214) for funding this study. We also thank Tim Golding, Doug Colman, Kathy Penny and Wes Penney, all of the University of South Australia, for technical advice and assistance.
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Cited Reference Count 45
Times Cited 11
Total Times Cited Count (WoS, BCI, and CSCD) 11
Publisher ELSEVIER SCIENCE BV
Publisher City AMSTERDAM
Publisher Address PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN 0048-9697
29-Character Source Abbreviation SCI TOTAL ENVIRON
ISO Source Abbreviation Sci. Total Environ.
Publication Date AUG 15
Year Published 2014
Volume 490
Beginning Page 579
Ending Page 589
Digital Object Identifier (DOI) 10.1016/j.scitotenv.2014.05.040
Subject Category 11
Document Delivery Number Environmental Sciences
Unique Article Identifier Environmental Sciences & Ecology
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