Abstract
The overall aim was to model solid transport and deposition in urban sewerage systems, as a means to investigate the possible impact of water conservation measures through potentially increased sedimentation in the urban sewerage system network.
The main practical aspect of the work was to recreate sedimentation accumulation and deposition in an urban sewerage system network in a full scale laboratory replica of a short 30m section with appropriate upstream conditions. The network was based on a modern housing development at Waulkmill Avenue, Paisley, Scotland. The conditions observed on this site (and replicated in the laboratory) are typical of similar networks. A comparison of the resultant laboratory data was made to the output of an existing simulation package: ‘DRAINET’. DRAINET is a mathematical simulation model based on EPSRC funded research grants obtained between 1985 and 2005, and is used to predict parameters in an urban sewerage system network such as flow depth and velocity at various distances, and solid transport distance, based on various pipe diameters and appliance discharge events. DRAINET assumes that simulated pipework is clear of sediment, although sedimentation can be ‘estimated’ by applying a notional and uniform artificial ‘friction factor’, based solely on theory. This is a current limitation of DRAINET and is a barrier to acceptance of DRAINET predictions by the wider water industry. The work described in this Report was aimed at mitigating this limitation of DRAINET, thereby significantly enhancing DRAINET and enabling more widespread use as an analysis tool.
The main practical aspect of the work was to recreate sedimentation accumulation and deposition in an urban sewerage system network in a full scale laboratory replica of a short 30m section with appropriate upstream conditions. The network was based on a modern housing development at Waulkmill Avenue, Paisley, Scotland. The conditions observed on this site (and replicated in the laboratory) are typical of similar networks. A comparison of the resultant laboratory data was made to the output of an existing simulation package: ‘DRAINET’. DRAINET is a mathematical simulation model based on EPSRC funded research grants obtained between 1985 and 2005, and is used to predict parameters in an urban sewerage system network such as flow depth and velocity at various distances, and solid transport distance, based on various pipe diameters and appliance discharge events. DRAINET assumes that simulated pipework is clear of sediment, although sedimentation can be ‘estimated’ by applying a notional and uniform artificial ‘friction factor’, based solely on theory. This is a current limitation of DRAINET and is a barrier to acceptance of DRAINET predictions by the wider water industry. The work described in this Report was aimed at mitigating this limitation of DRAINET, thereby significantly enhancing DRAINET and enabling more widespread use as an analysis tool.
| Original language | English |
|---|---|
| Place of Publication | London |
| Publisher | UKWIR |
| Number of pages | 33 |
| Volume | 19 |
| Edition | 1 |
| ISBN (Electronic) | 978-1-84057-868-3 |
| Publication status | Published - 23 Apr 2019 |
Keywords
- sedimentation
- test solid
- waste water
ASJC Scopus subject areas
- General Environmental Science
