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Short-term rehabilitation planning of water distribution networks

BRNO UNIVERSITY OF TECHNOLOGY Faculty of Civil Engineering Institute of Municipal Water Management BRNO, Czech Republic. Short-term rehabilitation planning of water distribution networks. Tomáš Kučera Ladislav Tuhovčák. Water pipes in Czech Republic. 64.500 km water mains in the CR

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Short-term rehabilitation planning of water distribution networks

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  1. BRNO UNIVERSITY OF TECHNOLOGY Faculty of Civil Engineering Institute of Municipal Water Management BRNO, Czech Republic Short-term rehabilitation planning of water distribution networks Tomáš Kučera Ladislav Tuhovčák

  2. Water pipes in Czech Republic • 64.500 km water mains in the CR • about 800 km per year should be rehabilitated • questions • What approach to reconstruction is the most suitable? • What technology should be used?

  3. Rehabilitation Planning • terms • long (15-20 years) • middle (3-5 years) • short (annual)

  4. Annual Rehabilitation Planning • main goal • propose some pipes for rehabilitation • questions • where? • when? • how? • cost?

  5. Planning diagram

  6. Steps of annual rehab planning • Basic elements

  7. The basic elements • hydraulic sections • not favourable • often too short • entities • several hydraulic sections with the same parameters: • diameter • material • installation year • system of streets • pattern of development • map of valves

  8. Steps of annual rehab planning • Obtaining of basis data

  9. The basis data • town planning scheme • Water-supply topology, mathematic model • regulations for water supply operation • long and middle term rehab plan • operation documentation • failures • leakages • television inspection survey • analysis of water quality • co-ordinations

  10. Steps of annual rehab planning • Criteria

  11. The set of criteria by CARE-W1. Internal • Annual Repair Cost • Water Losses Index

  12. The set of criteria by CARE-W2. External • Water Interruptions • Predicted Water Interruption • Predicted Critical Water Interruption • Predicted Frequency of Water Interruption • Damage and disruptions • Damage due to Flooding in Housing area • Damage due to Flooding in Industrial or commercial areas • Damages due to Soil Movement • Traffic Disruption • Damages and/or Disruption on other Infrastructure • Water Quality Deficiencies • Hydraulic Deficiencies

  13. The set of criteria by CARE-W3. Other • Co-ordination • with other utilities and roadway rehabilitation programmes • with service connection replacement programmes

  14. The simple set of criteria

  15. Steps of annual rehab planning • Selecting of entities

  16. Multi-criteria assessment • selecting a set of some elements (pipe-sections, entities) for rehabilitation • sorting procedure • the method of average weighting • => sort list • ranking procedure • the Electre methods • => categories • CARE-W_ARP (INSA Lyon)

  17. Steps of annual rehab planning • Rehab technologies

  18. Database of the rehab technologies • the selection of the right rehab technology for the sorted elements • rehab technologies for water mains • open-trench • trenchless • evaluation of every technology by criteria

  19. Database of the rehab technologies • applicability • costs • influence on • environment • pipe material • water quality • hydraulic properties • supplemental information • maximum length of pipe-section • realisation time • armature removing

  20. Decision support for the Annual Planning • CARE-W_ARP

  21. Priorities of operator „BVK“Weight of criteria [%]

  22. Annual Rehab Plan for Sub-zone by CARE-W_ARP by BVK (operator)

  23. Decision support for the Annual Planning • NetPlan_A

  24. NetPlan_A • Knowledge basis • Data • Input • Criteria • Pipe materials • Rehab technologies

  25. NetPlan_A • Task • Data evaluating • Sector value • Criteria calculation • Entities assortment • Technology proposition

  26. Conclusions • main goal: • to create a comprehensive support for annual rehab planning, which will be applicable in the conditions of the Czech Republic

  27. Thank you for your attention Tomáš Kučera kucera.t@fce.vutbr.cz Brno University of Technology http://water.fce.vutbr.cz

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