Author(s)

B.P. Coghlan

Abstract

The accurate prediction of solids transport in sewers is a problem which has been tackled by various approaches, none of which has proved wholly satisfactory. The paper describes an investigation of the transport of solids in combined sewers during both dry weather flow (DWF) periods and storms. The study was based upon data obtained from a number of sites in the combined sewer system of Dundee, Scotland. The relationship between hydraulic conditions in a combined sewer and the transport of solids in suspension was examined. The aim of the work was to arrive at a methodology by which an appropriate model could be selected or developed which would predict solids transport rates given information on hydraulic conditions. It was found that for individual sites, site specific regression equations could be developed for dry weather and storm conditions

Keywords