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

Water pipes in Czech Republic  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?

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

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

Planning diagram

Steps of annual rehab planning 1.Basic elements

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

Steps of annual rehab planning 2.Obtaining of basis data

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

Steps of annual rehab planning 3.Criteria

The set of criteria by CARE-W 1. Internal  Annual Repair Cost  Water Losses Index

The set of criteria by CARE-W 2. 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

The set of criteria by CARE-W 3. Other  Co-ordination with other utilities and roadway rehabilitation programmes with service connection replacement programmes

The simple set of criteria

Steps of annual rehab planning 4.Selecting of entities

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)

Steps of annual rehab planning 5.Rehab technologies

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

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

Decision support for the Annual Planning 1.CARE-W_ARP

Priorities of operator „BVK“ Weight of criteria [%] Co-ordination Score3030 Annual Repair Cost2020 Traffic Disruption14 Year of laid1010 Predicted Critical Water Interruption8 Predicted Water Interruption6 Predicted Frequency of Water Interruption6 Damage due to Flooding in Housing area6

Annual Rehab Plan for Sub-zone by CARE-W_ARPby BVK (operator)

Decision support for the Annual Planning 2.NetPlan_A

NetPlan_A  Knowledge basis Data  Input  Criteria Pipe materials Rehab technologies

NetPlan_A  Task Data evaluating Sector value Criteria calculation Entities assortment Technology proposition

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

Brno University of Technology Tomáš Kučera Thank you for your attention