Hydrographs' attenuation in sewers. Effects on stormwater source control regulation

Guido Petrucci (1) , Bruno Tassin (1)

1 LEESU - Laboratoire Eau, Environnement et Systèmes Urbains

In this paper we propose an empirical approach to quantify the hydrographs' attenuation in sewers. The purpose is to evaluate attenuation's consequences for the scale-transfer between the parcel and the catchment in urban settings, and in particular for stormwater source control (SC) regulation. In fact, SC regulation practices often consider this scale-transfer by a linear approach. We draw a formulation for the attenuation of peaks in partially full pipes, and we assess, by a sensitivity analysis, the respective weights of the different pipes' and hydrographs' characteristics on attenuation. We found that the driving factors of the peak attenuation vary according to the distance from the outlet, and we draw possible guidelines for SC regulation.

Mots clés: Attenuation; BMP; peak flow-rate; source control; stormwater sewer; urban runoff

Domaines: Hydrologie; Milieux et Changements globaux

Guido Petrucci, Bruno Tassin. Hydrographs' attenuation in sewers. Effects on stormwater source control regulation. 12th International Conference on Urban Drainage, Porto Alegre/Brazil, 11-16 September 2011, Sep 2011, Porto Alegre, Brazil. pp.No. ⟨hal-00698418⟩