MINIMIZING LEAKAGES AS PART OF A CONCEPTUAL STRATEGY IN WATER SUPPLY SYSTEM MASTER PLANS

Transkript

1 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, Praha 10 z.svitak@dhi.cz **SCVK a.s., Přítkovská, Teplice

2 Let s go to Prague, Czech Republic for a while

3 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

4 start Quite traditional situation? Pressure and DMA optimization Solving operational problems rban development Reconstructions Water quality

5 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

6 Case studies on WSS Master Plans in CZ Ústí nad Labem Liberec Teplice Jablonec Plzeň Praha 5 projects Hradec Králové

7 Characteristic of the water supply systems Teplice 358 km of water pipes 30 tanks inhabitants Reduction of 31 l/s = 43% of total leakage in 6 months. sti nad Labem 410 km of water pipes 32 tanks inhabitants Reduction of 24 l/s (20% in 1 year.

8 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

9 Methodology and results

10 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

11 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

12 Basic measurement campaign (SCADA + field Outputs Model calibration Basic leakage distribution Identification of problematic parts of the network

13 Basic leakage distribution in supply zones and sub-zones Components of inflow in the district

14 Night measurement campaigns - Teplice Identifed Leakage [l/s]

15 Results of night measurement campaigns - Teplice 1 2 Initial system ILI 3 4 After leakage survey and Savings reparations 2 ILI Supply zone/dma Bystřany- Prosenice Bystřany- Světice Bystřany- Nové Dvory Srbice D Trnovany Dubí Dubí Novosedlic e Proboštov Nová Ves Zemní Nová Ves u Teplic T-Centrum Šibeník Řetenice D Trnovany - jih D Trnovany - sever D Sobědruhy Provizorák Šibeník Řetenice Average Sum 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 ERO in one year

16 Economical evaluation of leakage reduction - Teplice

17 Reconstruction plan Ústí n.l. Modified variant 2 Prům. 1,17% Prům. 22,7 mil. Kč/rok " " " " " "" " " " " " " " " " " " " " " " " " "" " " " " " "

18 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.

19 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 % Kapacita stávajících zdrojů, přepouštění AK Řehlovice Zkapacitnění zdrojů + 50 l/s (Velké Žernoseky 35% Kapacita stávajících zdrojů, standardní zásobování 30% % l/s % % 10% 5% 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%

20 MASTER PLAN ACHIEVMENTS WSS optimization: High quality of water supply of all customers (existing and future

21 MASTER PLAN ACHIEVMENTS WSS optimization: Pressure optimization taking in account the resulting pressure above the roofs reduction of pressure by m in critical zones

22 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

23 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

24 Individual investment actions by the priority

25 I wish you to take right decissions

26 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, Praha 10 z.svitak@dhi.cz **SCVK a.s., Přítkovská, Teplice