Vesuviano, G. and Stovin, V.R. (2013) A generic hydrological model for a green roof drainage layer. Water Science and Technology, 68 (4). 769 - 775. ISSN 0273-1223
Abstract
A rainfall simulator of length 5 m and width 1 m was used to supply constant intensity and largely spatially uniform water inflow events to 100 different configurations of commercially available green roof drainage layer and protection mat. The runoff from each inflow event was collected and sampled at one-second intervals. Time-series runoff responses were subsequently produced for each of the tested configurations, using the average response of three repeat tests. Runoff models, based on storage routing (dS/dt = I–Q) and a power-law relationship between storage and runoff (Q = kSn), and incorporating a delay parameter, were created. The parameters k, n and delay were optimized to best fit each of the runoff responses individually. The range and pattern of optimized parameter values was analysed with respect to roof and event configuration. An analysis was performed to determine the sensitivity of the shape of the runoff profile to changes in parameter values. There appears to be potential to consolidate values of n by roof slope and drainage component material.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2013 IWA. This is an author produced version of a paper subsequently published in Water Science and Technology. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | detention; drainage layer; green roof; modelling; sustainable drainage systems; urban drainage |
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: | 23 Apr 2014 08:42 |
Last Modified: | 23 Apr 2014 08:42 |
Published Version: | http://dx.doi.org/10.2166/wst.2013.294 |
Status: | Published |
Publisher: | IWA Publishing |
Identification Number: | 10.2166/wst.2013.294 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:78238 |