Simulation of green roof test bed runoff

Gerald Krebs, Kirsi Kuoppamäki, Teemu Kokkonen, Harri Koivusalo

Research output: Contribution to journalArticle

Abstract

Low Impact Development (LID) aims to mitigate the hydrological impacts of urbanization by replication of processes in natural catchments. Green roofs covered with vegetation and pervious substrate are one alternative among a wide range of LID tools. Water retention of green roofs depends on many factors (e.g. local climate), and measurements remain crucial in evaluating their performance. The simulation of green roof retention by a hydrological model is one option to evaluate their potential benefits before implementation. In this paper, we evaluated the ability of the recently introduced LID green roof module of the stormwater management model to replicate runoff from monitored green roof test beds under Nordic climate conditions. A parameter sensitivity analysis was conducted to identify calibration parameters. The model showed an overall acceptable performance, and the results indicated the importance of accurately estimating potential evapotranspiration rates for inter-event periods, which is essential in representing the retention capacity regeneration.
Original languageEnglish
Pages (from-to)250-262
Number of pages13
JournalHydrological processes
Volume30
DOIs
Publication statusPublished - 2016
Externally publishedYes

Keywords

  • green roof runoff
  • SWMM
  • evapotranspiration
  • GLUE

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    Krebs, G., Kuoppamäki, K., Kokkonen, T., & Koivusalo, H. (2016). Simulation of green roof test bed runoff. Hydrological processes, 30, 250-262. https://doi.org/10.1002/hyp.10605