Understanding blockage formation in combined sewer networks
This paper documents a key part of the development of a risk analysis process that may be used as a tool to manage maintenance expenditure within the context of ‘serviceability’ to customers, the public and the environment. Against the background of poor availability of reliable data, the text outlines the basis of a methodology that can be used to model blockage likelihood in combined sewers with limited information and without the need for additional data gathering. Specifically, the work reported here relates primarily to research undertaken to better understand what network-and catchment-specific factors influence the formation of blockages that lead to flooding in combined and foul drainage systems. The role of each of these factors is considered in turn and the significance of their impact is estimated.
-
-
D. K. Lysne.
(1969)
Hydraulic design of self-cleaning sewage tunnels.
ASCE Journal of Sanitary Engineering Division,
1 ,
17 -
36
-
I. C. R. Byatt.
(2000)
MD161: To the Managing Directors of all Water and Sewerage Companies and Water Only Companies
-
R. M. Ashley ,I. Longair ,D. J. J. Wotherspoon ,K. Kirby.
(1993)
Flow and sediment movement monitoring in large sewers.
Water Science Technology,
55 -
65
-
J. C. Ackers ,D. Butler ,R. W. P. May.
(1996)
Design of Sewers to Control Sediment Problems
-
Sewerage Rehabilitation Manual
-
D. Balmforth ,C. Digman ,R. Kellagher ,D. Butler.
(2006)
Designing for Exceedance in Urban Drainage–Good Practice
-
(2004)
Out of Sight–Not out of Mind: Ofwat and the Public Sewer Network in England and Wales. Thirteenth Report of Session 2003–04, Report HC 463
-
(1998)
Drain and Sewer Systems Outside Buildings–Part 4: Hydraulic Design and Environmental Considerations
-
(2007)
Review of Existing Private Sewers and Drains in England and Wales–Regulatory Impact Assessment
-
B. Moss ,J. Woodhouse.
(1998)
Criticality analysis revisited.
Journal of Asset Management,
3 ,
17 -
28
-
C. Nalluri ,A. Ab Ghani.
(1993)
Bed-load transport without deposition in channels of circular cross section.
-
G. M. Clarke ,D. Cook.
(2005)
A Basic Course in Statistics
-
R. M. Ashley ,J. L. Bertrand-Krajewski ,T. Hvitved-Jacobsen ,M. Verbanck.
(2004)
Solids in Sewers: Characteristics, Effects and Control of Sewer Solids and Associated Pollutants
-
Ofwat.
(2000)
Levels of Service Indicators: How Ofwat Measures Companies’ Service to Customers
-
K. M. Yao.
(1974)
Sewer line design based on critical shear stress.
ASCE Journal of Environmental Engineering Division,
2 ,
507 -
520
-
G. Stotz ,K. H. Krauth.
(1986)
Proceedings of Urban Drainage Management ‘86
/content/article/10.1680/wama.2008.161.4.215
dcterms_subject,pub_keyword
6
3
