Peng, Z. orcid.org/0000-0003-3918-4479, Garner, B. and Stovin, V. orcid.org/0000-0001-9444-5251 (2022) Two green roof detention models applied in two green roof systems. Journal of Hydrologic Engineering, 27 (2). 04021049. ISSN 1084-0699
Abstract
A two-stage physically-based detention model has been developed for green roof systems. Vertical flow in the substrate is represented by the Richards equation, and horizontal flow in the underlying drainage layer is modeled by the Saint Venant equation. This two-stage physically-based model (2SPB) and the stormwater management model (SWMM) green roof low impact development control model (SWMM-GR) were validated using measured runoff profiles from two contrasting green roof systems: a conventional green roof system; and an innovative system intended to enhance detention. The substrate and drainage layer model parameters were identified from independent physical tests. The 2SPB model provides a reasonable estimation of runoff profiles from a conventional green roof system. However, the model is not capable of representing the flow conditions in the innovative green roof system’s detention layer, such that model results were less accurate for this system compared with the conventional green roof system. SWMM-GR model results for the conventional system were less representative of its overall detention performance due to the assumptions inherent in the substrate percolation model.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 ASCE. This is an author-produced version of a paper subsequently published in Journal of Hydrologic Engineering. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Green roof; Detention models; Physically-based model; SWMM green roof model; Validation |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Civil and Structural Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 11 Mar 2022 16:04 |
Last Modified: | 12 Mar 2022 12:50 |
Status: | Published |
Publisher: | American Society of Civil Engineers (ASCE) |
Refereed: | Yes |
Identification Number: | 10.1061/(asce)he.1943-5584.0002155 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:184649 |