Performance of Green roof in stormwater management regarding high-resolution precipitation fields

Abstract : At the basin scale, green roofs can represent an efficient tool to manage stormwater in urbanized areas. Widely implemented and/or completed with additional sustainable urban drainage systems, they show a positive impact on urban runoff: decrease and slowdown of the peak discharge and decrease of runoff volume. To assess green roof performances at this scale, a specific module dedicated to simulate their hydrological behaviour has been developed in the Multi-Hydro rainfall-runoff model. Its distributed structure gives the opportunity to test the susceptibility of green roof response regarding spatial distributions of precipitation. Based on radar rainfall fields, an ensemble of 50 realistic downscaled rainfall fields with a resolution of 10 m in space has been generated by using multifractals downscaling technique. Simulations have been conducted on a small urban catchment close to Paris (France) where most of the buildings roofs are assumed to easily accept the implementation of green roof. Although green roof confirm their ability to reduce urban runoff, these results illustrate that peak discharge reduction seems to be clearly dependant of spatial distribution of precipitation. Implementation of green roof can also produce concomitance situations and higher peak discharges than those produced by impervious roofs.
Liste complète des métadonnées

Cited literature [17 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01239199
Contributor : Pierre-Antoine Versini <>
Submitted on : Monday, December 7, 2015 - 3:07:25 PM
Last modification on : Tuesday, March 13, 2018 - 11:54:04 AM
Document(s) archivé(s) le : Saturday, April 29, 2017 - 9:14:18 AM

File

UDM2015_Paper_Versini_vf.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : hal-01239199, version 1

Collections

Citation

Pierre-Antoine Versini, Auguste Gires, Ioulia Tchiguirinskaia, D Schertzer. Performance of Green roof in stormwater management regarding high-resolution precipitation fields. Urban Drainage Modelling 2015, Sep 2015, Mont-Saint-Anne, Canada. ⟨hal-01239199⟩

Share

Metrics

Record views

301

Files downloads

227