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Response of a Sedum green-roof to individual rain events

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Author

Summary, in English

Precipitation and runoff data from several controlled experiments (with dry and wet initial conditions) on a Sedum album green-roof have been analysed by means of linear programming in order to estimate a unit hydrograph (UH). The obtained UH was able to accurately predict peak flows and runoff volumes for any rain input. Results from the experiments indicated that roof slope had no effect on the direct runoff hydrograph, i.e., on peak flows and stormwater volumes. Whether conditions were dry or wet affected the retention capacity of the green-roof; for dry conditions, between 6 and 12 mm of rain were required to initiate runoff, while for wet conditions the response was almost straight.

Publishing year

2005

Language

English

Pages

1-7

Publication/Series

Ecological Engineering: the Journal of Ecotechnology

Volume

25

Issue

1

Document type

Journal article

Publisher

Elsevier

Topic

  • Water Engineering

Keywords

  • linear programming
  • unit hydrograph
  • stormwater
  • Sedum album
  • green-roof

Status

Published

ISBN/ISSN/Other

  • ISSN: 1872-6992