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Short-term rehabilitation planning of water distribution networks
Tomáš KučeraLadislav Tuhovčák
BRNO UNIVERSITY OF TECHNOLOGYFaculty of Civil EngineeringInstitute of Municipal Water Management
BRNO, Czech Republic
http://water.fce.vutbr.cz 2/27
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?
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Rehabilitation Planning
terms long (15-20 years) middle (3-5 years) short (annual)
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Annual Rehabilitation Planning
main goal propose some pipes for rehabilitation
questions where? when? how? cost?
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Planning diagram
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Steps of annual rehab planning
1. Basic elements
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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
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Steps of annual rehab planning
2. Obtaining of basis data
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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
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Steps of annual rehab planning
3. Criteria
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The set of criteria by CARE-W1. Internal
Annual Repair Cost Water Losses Index
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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
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The set of criteria by CARE-W3. Other
Co-ordination with other utilities and roadway
rehabilitation programmes with service connection replacement
programmes
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The simple set of criteria
basic parameters importanceexternal
parameterstechnical condition
DNnumber of
people suppliedcoordination age
lengthsensitive customer
category of street
failure rate
materialhydraulic
criticality indexleakage
pressure
water quality
entity ID
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Steps of annual rehab planning
4. Selecting of entities
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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)
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Steps of annual rehab planning
5. Rehab technologies
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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
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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
technology namekindprincipleusing corrosion
leakagestatics
coststage length max
pressure minmax
inspectioncleaning
old pipe DN minmax
material CIGGGSTGRPCONPEPVC
new pipe materialDNroughnessservis lifestatics
hole startend
service pipe
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Decision support for the Annual Planning
1. CARE-W_ARP
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Priorities of operator „BVK“Weight of criteria [%]
Co-ordination Score 30
Annual Repair Cost 20
Traffic Disruption 14
Year of laid 10
Predicted Critical Water Interruption 8
Predicted Water Interruption 6
Predicted Frequency of Water Interruption 6
Damage due to Flooding in Housing area 6
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Annual Rehab Plan for Sub-zone
by CARE-W_ARP by BVK (operator)
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Decision support for the Annual Planning
2. NetPlan_A
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NetPlan_A
Knowledge basis Data
Input Criteria
Pipe materials Rehab technologies
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NetPlan_A
Task Data evaluating Sector value Criteria calculation Entities assortment Technology proposition
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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 Technologyhttp://water.fce.vutbr.cz
Tomáš Kuč[email protected]
Thank you for your attention
