Validation of an unsteady flow numerical model for sediment transport induced by flushing operation in combined sewers

Gashin Shahsavari (1) , Alberto Campisano (2) , Carlo Modica (2) , Gilles Arnaud-Fassetta (3)

1 PRODIG - Pôle de recherche pour l'organisation et la diffusion de l'information géographique
2 Unict - Università degli studi di Catania = University of Catania
3 LGP - Laboratoire de géographie physique : Environnements Quaternaires et Actuels

An unsteady flow numerical model based on the solution of the 1-D De Saint Venant-Exner equations was developed and validated against the results of a field flushing experiment that was carried out in the year 2014 within a combined sewer trunk of the Paris sewer system. The comparison of numerical and experimental results showed that the model may reproduce in a proper way the erosional effects of the flush on the mobile bed of the sewer at the end of the experiment. Model results confirmed the potential erosive effect of the flush up to several hundreds meters downstream of the flushing device, with a significant reduction of the deposited sediments in the channel.

Mots clés: Sewer flushing; Sediment transport modeling; Combined sewer

Domaines: Ingénierie de l'environnement

Gashin Shahsavari, Alberto Campisano, Carlo Modica, Gilles Arnaud-Fassetta. Validation of an unsteady flow numerical model for sediment transport induced by flushing operation in combined sewers. 11th International Conference on Urban Drainage Modelling, Sep 2018, Palerme, France. ⟨hal-01907266⟩