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Runoff detention effect of a sedum green-roof

Villarreal-Gonzalez, Edgar LU (2007) In Nordic Hydrology 38(1). p.99-105
Abstract
In order to estimate the detention effect (storage and peak flow attenuation) of a sedum green-roof, a comparison between the response of an impervious roof (runoff coefficient C = 1) and a green-roof has been carried out. Precipitation and runoff data from several controlled experiments (with wet initial conditions, i.e. approximately at field capacity) on a sedum green-roof were used for the analysis. For events with variable rain intensity, the green-roof's attenuation effect was as high as 65% for design storms. In contrast, events with constant intensity had increases in peak flows of up to 5%. The lowest detention volumes were observed for the experiments with constant rain intensity, for which a maximum of 29% of the rain volume was... (More)
In order to estimate the detention effect (storage and peak flow attenuation) of a sedum green-roof, a comparison between the response of an impervious roof (runoff coefficient C = 1) and a green-roof has been carried out. Precipitation and runoff data from several controlled experiments (with wet initial conditions, i.e. approximately at field capacity) on a sedum green-roof were used for the analysis. For events with variable rain intensity, the green-roof's attenuation effect was as high as 65% for design storms. In contrast, events with constant intensity had increases in peak flows of up to 5%. The lowest detention volumes were observed for the experiments with constant rain intensity, for which a maximum of 29% of the rain volume was detained, whereas for rain events with variable intensity the detention volume was up to 52%. Simulations (using PondPack), based on a real case study, showed that green-roofs can be implemented in combination with other structural best management practices (BMPs) to obtain a desired detention. They can be used to reduce the size of other structural BMPs, and can occupy unused space that is readily available. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
green-roof, BMP, detention, roof runoff, sedum
in
Nordic Hydrology
volume
38
issue
1
pages
99 - 105
publisher
IWA Publishing
external identifiers
  • wos:000243932900007
  • scopus:33846781518
ISSN
1996-9694
DOI
10.2166/nh.2007.031
language
English
LU publication?
yes
id
507a30f5-0fc0-48f0-a719-b0f1c544f947 (old id 674992)
date added to LUP
2007-12-19 13:20:43
date last changed
2017-04-23 03:35:46
@article{507a30f5-0fc0-48f0-a719-b0f1c544f947,
  abstract     = {In order to estimate the detention effect (storage and peak flow attenuation) of a sedum green-roof, a comparison between the response of an impervious roof (runoff coefficient C = 1) and a green-roof has been carried out. Precipitation and runoff data from several controlled experiments (with wet initial conditions, i.e. approximately at field capacity) on a sedum green-roof were used for the analysis. For events with variable rain intensity, the green-roof's attenuation effect was as high as 65% for design storms. In contrast, events with constant intensity had increases in peak flows of up to 5%. The lowest detention volumes were observed for the experiments with constant rain intensity, for which a maximum of 29% of the rain volume was detained, whereas for rain events with variable intensity the detention volume was up to 52%. Simulations (using PondPack), based on a real case study, showed that green-roofs can be implemented in combination with other structural best management practices (BMPs) to obtain a desired detention. They can be used to reduce the size of other structural BMPs, and can occupy unused space that is readily available.},
  author       = {Villarreal-Gonzalez, Edgar},
  issn         = {1996-9694},
  keyword      = {green-roof,BMP,detention,roof runoff,sedum},
  language     = {eng},
  number       = {1},
  pages        = {99--105},
  publisher    = {IWA Publishing},
  series       = {Nordic Hydrology},
  title        = {Runoff detention effect of a sedum green-roof},
  url          = {http://dx.doi.org/10.2166/nh.2007.031},
  volume       = {38},
  year         = {2007},
}