SEDIMENT TRANSPORT MODELING IN COMBINED SEWER

The classical solid transport theory has been used to analyse the expe rimental results obtained from the No.13 combined sewer trunk of Marse ille for more than two years. This study demonstrates that the sedimen t transport phenomena in a combined sewer trunk are nothing other than the classical ones. A numerical model has been established according to the analyses. Based on a permanent flow regime, this model consider s not only the effects of the real channel geometry, non-uniform parti cles size, but also the coexistence of mineral and organically materia ls. Some particular sediment transport phenomena such as the armouring of bed have also been taken into account. It also shows that although the influence of the suspension particles is not necessarily consider ed, the simulation including the variations of particle density with e ach granular fraction may be improved. Copyright (C) 1996 IAWQ. Publis hed by Elsevier Science Ltd.