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Printer Friendly VersionSelected Information - Completed Research

CP191  Reducing Sewer Collapse Risk using GIS Soil Maps Sewerage
The Sewerage Rehabilitation Manual shows that sewer collapse risk is clearly linked to certain ground conditions but it is often hard to locate these conditions from standard GIS or paper geological maps.

There is a need to substantially improve information about all aspects of sewer systems and identify factors that cause deterioration. Advances in technology can provide knowledge of ground conditions surrounding pipes, improving understanding of frequency / cause of sewer collapse.

The objective of this project is to indicate ground conditions likely to lead to sewer collapse by combing WRc's knowledge of soil attributes increasing collapse risk with the British Geological Survey's (BGS's) database of where these soil conditions exist. Maps will be produced which can interface with specific GIS pipe information to illustrate where sewers are of greatest collapse risk in a particular area.

Benefits to Clients

  • Increased understanding of soil type / groundwater effects to predict pipe deterioration and sewer collapse
  • Better investment appraisal / planning through using the collapse likelihood models
  • Reduced numbers of sewer collapse
  • Large potential savings through targeting sewer rehabilitation.
WRc's Portfolio Programme
Summary of the £1.5 million per annum research programme

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