A whole life costing approach to distribution network management (1998-2001).

Funding body: Engineering and Physical Sciences Research Council (EPSRC)

To promote the efficient use of resources there is a recognised need to make best use of existing infrastructure. Whole Life Costing (WLC) in combination with computational optimisation techniques has been used to satisfy this need. WLC methodologies consider all the costs (private & social) that accrue to initiation, provision, operation, maintenance, servicing and decommissioning, over the useful life of a service facility. Application of WLC to (capital and operational) management of water distribution networks has been based on detailed consideration of holistic performance and explicit linking of costs to their drivers. Decision Modelling links the Costs and Performance frameworks via WLC Scenario Management Software called WiLCO.

WiLCO incorporates an optimisation module to find the least Whole Life Cost management solution within the user defined performance/risk/cost scenario. All aspects of performance which impact on costs accruing to any party are considered resulting in the derivation of six integrated performance sub-modules; Leakage, Demand, Structural Performance, Customer Interruptions, Water Quality, Hydraulic Capacity. These sub-modules quantify current and future performance and the effect on performance of interventions, e.g. pipe replacements and changes in operational strategy, at given time horizons.

This two-centre project between the Centre for Water Systems (University of Exeter) and the Pennine Water Group (University of Sheffield) and has been carried out in close collaboration with the water industry. Collaborators included water companies (Yorkshire Water, United Utilities, South West Water, Thames Water, Lyonnaise des Eaux), a consultant (Ewan Group), and a software provider (Geodesys).

The project outputs satisfy the aims of the WITE programme through which it was funded. The programme was established to promote research collaboration between universities and the water utilities, providing the basis for solutions to problems faced by the water industry and providing a supply of skilled people, trained in water engineering research. The key objective of the programme, dissemination and exploitation of the research outputs, through close collaboration with water utilities.

The project was funded by the UK Engineering and Physical Sciences Research Council (EPSRC) under the Water Infrastructure and Treatment Engineering (WITE) programme. and end-users, has been fully achieved as evidenced by the project outputs.

More about the project (partners, outcomes, Powerpoint presentations,etc) can be found athttp://www.ex.ac.uk/wlc

References

  • Engelhardt, M.O., Skipworth, P.J., Cashman, A., Savic, D., Saul, A.J., Walters, G.A. (2002) A Whole Life Costing for Water Distribution Network Management, Thomas Telford Ltd, London UK (ISBN 0-7277-3166-1), pages 216.
  • Engelhardt, M.O., Skipworth, P.J., Cashman, A., Savic, D., Walters, G.A., Saul, A.J., (2002) Applying Whole Life Costing to Water Distribution Network Management. Accepted for publication in Urban Water Journal.
  • Engelhardt, M.O., Skipworth, P.J., Cashman, A., Savic, D., Walters, G.A., Saul, A.J., (2002) Determining Maintenance Requirements of a Water Distribution Network using Whole Life Costing. J. Quality and Maintenance Engineering, Vol. 8, No. 2 (in press).
  • Skipworth, P.J., Engelhardt, M.O., Cashman, A., Savic, D., Walters, G.A., Saul, A.J., (2002) Performance Modelling in a Whole Life Costing Approach to Water Distribution Network Management. Submitted to ICE J. Water and Maritime Engineering
  • Skipworth P.J. (2002) Whole Life Costing for Sustainable Infrastructure - a focus on water distribution networks. Feature Article "Sustain - Built Environment Matters", Volume 3, Issue 3, McClelland Publishing.
  • Engelhard, M.O., Skipworth, P.J., Savic, D., Walters, G.A., Saul, A.J., Cashman, A., (2002) WiLCO: Whole Life Costing Software. Accepted for publication at ASCE/EWRI Annual Conference, Roanoke, Virginia, May 19-22.
  • Engelhardt, M.O., Savic, D., Walters, G.A., Skipworth, P.J., Saul, A.J., Cashman, A., (2002) Whole Life Costing methodology for Water Distribution Network Management. Accepted for publication at Enviro 2002, Melbourne, Australia.
  • Skipworth, P.J., Cashman, A., Engelhardt, M.O, Saul, A.J, Savic, D.A., and Walters, G.A. (2001) Incorporation of leakage in a whole life costing approach to distribution network management. In Water Software Systems: Theory and Applications, Vol. 1, Ulanicki, B., Coulbeck, B. and Rance, J.P. (eds.), Research Studies Press, Baldock, Hertfordshire, England, pp. 49-59.
  • Skipworth, P.J., Cashman, A., Engelhardt, M.O., Saul, A.J., Savic, D.A. (2001) Quantification of Mains Failure Behaviour in a Whole Life Costing Approach to Distribution System Management. World Water & Environmental Resources Congress, May 20-24, Orlando, Florida, edited by Phelps, D. and G. Sehlke (proceeding published on CD), p. 10.
  • Engelhardt, M.O., Skipworth, P.J., Cashman, A., Savic, D.A., Saul, A.J., Walters, G.A. (2001) Incorporation of water quality in a whole life costing approach to distribution network management. 4th International Conference on Water Pipeline Systems - "Managing Pipeline Assets in an Evolving Market", March 2001.
  • Engelhardt, M.O., Skipworth, P.J., Savic, D.A., Saul, A.J., Walters, G.A. (2000) Rehabilitation strategies for water distribution networks. Urban Water, Vol. 2, No. 2, pp. 153-170.
  • Skipworth, P.J., Saul, A.J. and Engelhardt, M.O. (2000) Distribution network behaviour - extracting knowledge from data. Int. Symposium on Water Network Modelling for Optimal Design and Management , Exeter, UK.
  • Engelhardt, M.O., Savic, D.A., Walters, G.A. (1999) Using genetic algorithms to optimise water distribution system rehabilitation, 9th International MIRCE Symposium on System Operational Effectiveness, Knezevic, J., U.D Kumar and C. Nicholas (eds.), Woodbury, UK.

Back to Water distribution system management

Google+