URBAN WATER DISTRIBUTION NETWORK MODELLING AND ANALYSIS
– As a part of the international workshop “Green designs for Integrated Urban Water Cycle Management – solutions for secondary cities in Global south to cope with climate change”, Can Tho City, Vietnam, 8 – 10 December, 2015.
Mid-career professionals dealing with technical aspects of drinking water transport & distribution, working for water supply companies, municipal assemblies or consulting bureaus. Engineers and scientists with keen interest in network modelling tools used in design, operation and maintenance of water transport & distribution networks.
Upon completion of the workshop, the participants will be able to:
– define the relation between the demands, pressures, velocities and hydraulic gradients;
– demonstrate understanding of the steady-state hydraulics by being able to select appropriate pipe diameter,
– indicate optimum location of reservoirs and identify pumps capable to supply the demand;
– perform computer-aided hydraulic calculations and predict the consequences of demand growth on the hydraulic performance of particular WTD system;
– analyse the implications of various operational modes of pumping stations;
– judge technical solutions dealing with the network rehabilitation and expansion;
– understand the theory of water quality modelling; distinguish and model various sources of water quality problems in distribution networks;
– apply the network software for preliminary assessment of irregular operational scenarios.
Steady-state hydraulics of pressurised flows: single pipe calculation, branched and looped networks; pressure driven demand; main principles of hydraulic and water quality modelling of distribution networks; main characteristics of EPANET software; demand modelling, pipe design; hydraulics of storage and pumps; modelling of various valves; modelling of chlorine residuals, water age and trace of demand from multiple sources; modelling of irregular supply scenarios, failure analysis and calculation of demand losses.
Day 1 of the programme starts with refresher on the theory of hydraulic- and water quality modelling. The core of the learning approach is the MS PowerPoint slideshow accompanied by MS Excel spreadsheet hydraulic lessons; these are also available for self-study. At the end of the day, the main characteristics of EPANET software shall be demonstrated, including the pressure driven demand (PDD) alternative developed by Pathirana (2010). Day 2 is devoted to practical work. During the design exercise, operation of small synthetic network of approximately 70 pipes is analysed by using EPANET software. Various scenarios shall be analysed including the demand growth, modelling of optimal position and size of water tanks, selection of appropriate pumps and pumping schedules, modelling of water quality, and assessment of irregular demand scenarios caused by the failure of network components.
1. N. Trifunović – Introduction to Urban Water Distribution, Taylor & Francis, 2008 (e-book)
2. Slide presentations (MS PowerPoint) combined with spreadsheet hydraulic lessons (MS Excel)
3. EPANET network modelling software (US Environmental Protection Agency, Ver.2); corresponding design assignment/case network
4. EPANET software – pressure driven demand version (Pathirana, 2010)
1. N. Trifunović, PhD, MSc 2. A. Pathirana, PhD, MSc (Plenary sessions)
|Day 1 – Wednesday, 9 December 2015|
|1.1||08:30 – 10:00||Lecture||Steady-state hydraulics of pressurised flows: single pipe calculation, branched and looped networks; pressure driven demand.||Classroom with PC beamer|
|1.2||10:00 – 10:15||Break||Coffee, tea|
|1.3||10:30 – 12:00||Lecture||Main principles of hydraulic and water quality modelling of distribution networks.||Classroom with PC beamer|
|1.4||12:00 – 13:00||Break||Lunch|
|1.5||13:00 – 14:30||Demonstration||Main characteristics of EPANET software; running EPANET simulations in PDD mode.||Classroom with PC beamer|
|1.7||14:30 – 15:30||Discussion||Plenary|
|1.8||15:30 – 16:00||Break||Coffee, tea|
|1.9||16:00 – 17:00||Discussion||Plenary|
|End of day 1|
|Day 2 – Thursday, 10 December 2015|
|2.1||08:30 – 10:00||Computer exercise||Demand modelling, pipe design, demand growth, valve modelling.||Classroom with PC beamer; participants work on their laptops|
|2.2||10:00 – 10:15||Break||Coffee, tea|
|2.3||10:30 – 12:00||Computer exercise||Hydraulics of storage and pumps.||Classroom with PC beamer; participants work on their laptops|
|2.4||12:00 – 13:00||Break||Lunch|
|2.5||13:00 – 14:30||Computer exercise||Water quality modelling: modelling of chlorine residuals, water age and trace of demand from multiple sources; failure analysis and calculation of demand losses.||Classroom with PC beamer; participants work on their laptops|
|2.6||14:30 – 14:45||Break||Coffee, tea|
|2.7||14:45 – 15:15||Discussion||Plenary|
|2.8||15:15 – 15:40||Break||Coffee, tea|
|2.9||15:40 – 17:00||Discussion||Plenary|
|End of day 2|