The holistic prioritisation of proactive sewer maintenance
1Sustainable Water Management Research Group, School of the Built Environment, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK. s.arthur@hw.ac.uk
Summary
This study introduces a FMECA-based tool for sewerage asset management, prioritizing maintenance by assessing blockage risks and consequences. It enhances serviceability with limited data, improving customer, public, and environmental outcomes.
Area of Science:
- Environmental Engineering
- Asset Management
- Risk Assessment
Background:
- Shift in sewerage asset management towards 'serviceability' as a key performance indicator.
- Flooding due to blockages identified as a critical failure mode in sewerage systems.
Purpose of the Study:
- Develop a tool for efficient sewerage asset management focused on serviceability.
- Provide a process for identifying and prioritizing maintenance needs with limited data.
Main Methods:
- Utilized Failure Modes, Effects, and Criticality Analysis (FMECA) for process development.
- Integrated land use and network characteristics with a hydrodynamic model.
- Developed methodologies for quantifying blockage likelihood and failure consequence.
Main Results:
- A FMECA-based process for sewerage asset management with limited data availability.
- Identification of critical network points and assessment of blockage risks.
- A framework for prioritizing maintenance by combining failure likelihood and consequence.
Conclusions:
- The developed tool enables efficient sewerage asset management and improved serviceability.
- The process is implementable with minimal data, reducing the need for extensive data gathering.
- Prioritized maintenance strategies enhance customer, public, and environmental protection.
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