LABORATORY STUDY AND COMPUTER-MODEL DEVELOPMENT RELATED TO GROSS SOLIDS MOVEMENT IN COMBINED SEWERS

Significant problems in sewer systems are caused by gross solids, and there is a strong case for their inclusion in computer simulation mode ls of sewer flow quality. The paper describes a project which consider ed methods of modelling the movement of gross solids in combined sewer s. Laboratory studies provided information on advection and deposition of typical gross solids in part-full pipe flow. Theoretical considera tions identified aspects of models for gross solids that should differ from those for dissolved and fine suspended pollutants. The proposed methods for gross solids were incorporated in a pilot model, and their effects on simple simulations were considered. Copyright (C) 1996 IAW Q. Published by Elsevier Science Ltd.