MINIMIZING LEAKAGES AS PART OF A CONCEPTAL STRATEGY IN WATER SPPLY SYSTEM MASTER PLANS Zdenek Svitak*, Karel Eminger**, Oldrich Kolovrat*, Ondrej Janku*, *DHI a.s., Na Vrších 5, 100 00 Praha 10 z.svitak@dhi.cz **SCVK a.s., Přítkovská, Teplice
Let s go to Prague, Czech Republic for a while
Content Why to apply the NRW reduction as a part of WSS Master Plans? Case studies in the CZ by DHI Applied methodology and results
start Quite traditional situation? Pressure and DMA optimization Solving operational problems rban development Reconstructions Water quality
Solve the problems together in a Master Plan start Secure high quality of water supply service for existing and future customers Avoid wrong decissions Save operational and investment cost! Maintain high water quality Consider NRW as a problem that has to be solved in the Master plan Try to get fast leakage reduction Propose long-term NRW reduction mesures
Case studies on WSS Master Plans in CZ Ústí nad Labem 2007-2008 Liberec 2009-2010 Teplice 2009-2010 Jablonec 2009-2010 Plzeň 2003-2005 Praha 5 projects 2005 2010 - Hradec Králové 2009-2010
Characteristic of the water supply systems Teplice 358 km of water pipes 30 tanks 53 000 inhabitants Reduction of 31 l/s = 43% of total leakage in 6 months. sti nad Labem 410 km of water pipes 32 tanks 98 800 inhabitants Reduction of 24 l/s (20% in 1 year.
Basic features of the Master Plans Mathematical models Extensive monitoring Cohesion of operational and conceptual problems Extensive cooperation with the operational staff in the field -> measurement, information, capacity building at side of the operator Involve the infrastructure owner in the proccess of the project
Methodology and results
Basic tasks of the Master Plan Mathematical model Basic measurement campaign Evaluation of the existing WSS operational problems, pressures, fire capacity, WQ+ basic water balance and leakage distribution Evaluation of water sources existing and future Plan of water supply network and objects reconstruction WSS development conception WSS optimization + capacity for the urban development Investment plan Detailed measurement campaign -> reasons for operational problems and fast leakage reduction Implementation of SW package Leak Monitor
Matematical model Basic tool for the tasks It is used by operator and owner after finalization of the project Enables easy future update of the Master Plans
Basic measurement campaign (SCADA + field Outputs Model calibration Basic leakage distribution Identification of problematic parts of the network
Basic leakage distribution in supply zones and sub-zones Components of inflow in the district
Night measurement campaigns - Teplice Identifed Leakage [l/s]
Results of night measurement campaigns - Teplice 1 2 Initial system ILI 3 4 After leakage survey and Savings reparations 2 ILI 3 4 1 4 11.2 7.28 4.69 20 523 43 743 4.78 3.08 13 477 28 726 2.50 15 017 7.6 0.00 0.00 0 0 0.00 0.00 0 0 0.00 0 4.2 0.00 0.00 0 0 0.00 0.00 0 0 0.00 0 Supply zone/dma Bystřany- Prosenice Bystřany- Světice Bystřany- Nové Dvory Srbice 19.4 0.00 0.00 0 0 0.00 0.00 0 0 0.00 0 D2-6.9 0.00 0.00 0 0 0.00 0.00 0 0 0.00 0 Trnovany Dubí 2 26 6.33 1.13 7 687 38 044 6.33 1.13 7 687 38 044 0.00 0 Dubí 3 5.4 0.00 0.00 0 0 0.00 0.00 0 0 0.00 0 Novosedlic 21.9 1.59 0.51 2 295 9 578 1.59 0.51 2 295 9 578 0.00 0 e Proboštov 11.8 7.75 2.88 20 761 46 525 0.25 0.09 658 1 474 7.50 45 051 Nová Ves - 6.1 0.00 0.00 0 0 0.00 0.00 0 0 0.00 0 Zemní Nová Ves u 7.4 1.33 1.26 5 705 7 982 1.33 1.26 5 705 7 982 0.00 0 Teplic T-Centrum 38 24.57 3.92 20 413 147 563 17.57 2.80 14 596 105 515 7.00 42 048 Šibeník1-27.9 0.00 0.00 0 0 0.00 0.00 0 0 0.00 0 Řetenice D3-9.1 0.42 0.23 1 439 2 497 0.42 0.23 1 439 2 497 0.00 0 Trnovany - jih D3-22.9 0.00 0.00 0 0 0.00 0.00 0 0 0.00 0 Trnovany - sever D3-9.2 0.00 0.00 0 0 0.00 0.00 0 0 0.00 0 Sobědruhy Provizorák 9.2 9.41 6.05 32 304 56 529 2.41 1.55 8 275 14 481 7.00 42 048 Šibeník2-14.1 13.10 8.65 29 400 78 683 6.10 4.03 13 689 36 635 7.00 42 048 Řetenice Average 14.3 3.99 8 774 23 952 2.27 13 607 1.72 10 345 Sum 258 71.8 431 145 40.8 244 932 31.0 186 213 SMMARY April 2009 total leakage of 71.8 l/s September 2009 total leakage 40.8 l/s Leakage reduction by 31.0 l/s (43% => savings 180 000 ERO in one year
Economical evaluation of leakage reduction - Teplice
Reconstruction plan Ústí n.l. Modified variant 2 Prům. 1,17% Prům. 22,7 mil. Kč/rok " " " " " "" " " " " " " " " " " " " " " " " " "" " " " " " "
MASTER PLAN ACHIEVMENTS Leakage detection activities that conducted the fast leakage reduction by 20, resp. 40%. As result, more than 50% of the Master plan cost was returnd just during the project period by this particular task result.
MASTER PLAN ACHIEVMENTS Planning of water sources X Leakage control (sti nad Labem Water Bilance demand potřeby forecast vody a kapacity and reserve zdrojů vody in pro water Ústí nad sources Labem - Qd capacity 500.0 40% 450.0 Kapacita stávajících zdrojů, přepouštění AK Řehlovice Zkapacitnění zdrojů + 50 l/s (Velké Žernoseky 35% 400.0 350.0 Kapacita stávajících zdrojů, standardní zásobování 30% 300.0 25% l/s 250.0 20% 200.0 150.0 100.0 50.0 15% 10% 5% 0.0 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 rok Qd Ústí bez redukce úniků Qd Ústí s redukcí úniků o 30 l/s za 6 let Kapacita stávajících zdrojů Kapacita stávajících zdrojů, přepouštění AK Řehlovice Zkapacitnění zdrojů + 50 l/s (Velké Žernoseky Rezerva ve zdrojích 0%
MASTER PLAN ACHIEVMENTS WSS optimization: High quality of water supply of all customers (existing and future
MASTER PLAN ACHIEVMENTS WSS optimization: Pressure optimization taking in account the resulting pressure above the roofs reduction of pressure by 10-30 m in critical zones
MASTER PLAN ACHIEVMENTS WSS optimization: Optimization of system of measurement, supply zones and DMAs The average length of DMA size dropped from 15 km to 9 km (sti nad Labem
MASTER PLAN ACHIEVMENTS WSS optimization: Solving of the water quality problems caused by the instability of flow conditions in some parts of the system. Reconstruction plan of water distribution system Solving of exceptional situations
Individual investment actions by the priority
I wish you to take right decissions
MINIMIZING LEAKAGES AS PART OF A CONCEPTAL STRATEGY IN WATER SPPLY SYSTEM MASTER PLANS Thank you for your attention! Zdenek Svitak*, Karel Eminger**, Oldrich Kolovrat*, Ondrej Janku*, *DHI a.s., Na Vrších 5, 100 00 Praha 10 z.svitak@dhi.cz **SCVK a.s., Přítkovská, Teplice