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Low-sloped rooftop Storm-water Detention Assembly to mitigate urban flooding

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.3390/buildings13010008
AuthorSearch for: 1; Search for: ; Search for: 1; Search for: ; Search for: 1
Affiliation
  1. National Research Council of Canada. Construction
FormatText, Article
SubjectStorm-water Detention Assembly (SDA); low-sloped roofs; roof drain requirements; storm-water management; urban flooding
Abstract
Low-sloped roofs such as commercial and high-rise buildings in a dense urban area provide vast “unused” surfaces that can be used to manage storm-water and mitigate urban flooding. Storm-water Detention Assembly (SDA) known as “blue roof” exerts advanced drainage technologies and operational strategies to store-and-release storm-water during and after heavy rainfall events. SDA can reduce peak flow and decrease storm-water run-off volume. However, the SDA application is limited due to the lack of science-based regulatory requirements. This paper introduces SDA, summarizes the benefits and challenges of this system, reviews the existing code specifications on roofing drain systems, and documents the criteria to design and construct SDA. With this systematic approach, the missing links are identified that shall form code change request for possible inclusion in the National Building Code of Canada (NBCC) and National Plumping Code of Canada (NPC). In addition, a road map is stated to calculate and benchmark the drain requirements on low-sloped roofs for a given design climatic load.
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PublisherMDPI
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  • Buildings 13, no. 1, 8 (21 December 2022).
LanguageEnglish
Peer reviewedYes
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Record identifier1e3dcbb6-f58f-4b4a-ad45-19be9f6f2688
Record created2023-02-21
Record modified2023-02-21
Date modified: