Presentation is loading. Please wait.

Presentation is loading. Please wait.

GEELONG MODELLING PROGRAM AND FUTURE UPGRADES Mircea Stancu 25 June 2010.

Similar presentations


Presentation on theme: "GEELONG MODELLING PROGRAM AND FUTURE UPGRADES Mircea Stancu 25 June 2010."— Presentation transcript:

1 GEELONG MODELLING PROGRAM AND FUTURE UPGRADES Mircea Stancu 25 June 2010

2 BARWON WATER Regional Water Corporation South west of Melbourne

3 GEELONG DISTRICT SEWER CATCHMENT Geelong

4 GEELONG DISTRICT SEWER CATCHMENT

5

6

7 POPULATION GROWTH PREDICTION GREATER GEELONG AREA 2045 PREDICTION New residents: between 88,000 and 142,000 Total ADWFs will increase by between 75ML/day and 100ML/day (over 50% increase) Increase in ADWF to Black Rock WRP between 69ML/day and 92ML/day (over 50% increase)

8 GEELONG DISTRICT SEWER CATCHMENT

9 GEELONG TRUNK NETWORK Trunk network in Geelong -Relatively isolated from northern flows -Relying on two main sewers -Very difficult to upgrade (going through Geelong CBD -High impact in case of failure -Future servicing strategy relying on smart use of interconnections and current capacity. Flow Retarding Facility New WRP

10 GEELONG TRUNK NETWORK How it works

11 CURRENT PRACTICE Current Status Quo -Extensive use of WSAA code recommendations for smaller divisions -A current MIKE11/MOUSE trunk sewer model mainly used by consultants -No in-house expertise on model/software package

12 MONITORING PROGRAM Location of monitors Monitoring for: -Level -Flow -EC -Rainfall Monitoring Program: -Early phase of implementation -May be enhanced by temporary monitoring -3 years long -Main scope is to provide reliable data for the modelling project

13 MODELLING PROGRAM SCOPE MAIN SCOPE -Prove 1 in 5 years compliance -Providing better network behavior understanding -Providing critical information for new Capital Works Expenditure -Providing option analysis tools (best value for money) -Providing information for maintenance purposes (high infiltration areas, diversion flows, etc.) ADDITIONAL SCOPE -Confirmation of sewer return ratios -Information regarding effects of water restriction on sewer flows -Confirmation of impact of repairs (e.g. sewer re-lining, de-silting) and replacements -Better prediction of the impact of new developments -Flow profiles and their impact on sewer mining options -Impact of sewer mining on network -Infiltration level information (including saltwater infiltration) -Horizontal integration with BWs GIS system Will attempt to solve main issues we are facing such as: -How much spare capacity we still have in the pipes -How the interconnections will work and how the network will respond -How the new WRP to the north of Geelong will influence the network behavior -When we will need to upgrade the transport pipe from Geelong to Black Rock

14 MODELLING RESOURCING AND DELIVERY OPTIONS Current ideas: DEVELOPMENT: Externally developed, internally maintained -Provides best combination of risk mitigation and value for expenditure MODEL TYPE: Detailed network -Longer setup time of geographical network however far easier to set up parameters and loadings -Corrected GIS data can be fed back into the GIS system -Less error prone to options analysis and inclusion of new developments and demands (no bulk catchments) -Provide a good platform for the modelling of other smaller areas for various purposes (infiltration modelling, sewer mining, flows diversions etc.) -Easy to improve in the future

15 MODELLING RESOURCING AND DELIVERY OPTIONS SUMMARY: My recommendation is for the model to be: - Detailed network - Externally generated - Internally maintained

16 MODELLING PROJECT IMPLEMENTATION STEPS 1.Ensure stakeholders agreement and corporate support: Aug-Sept 2.Ask for capabilities statement and/or presentations from major software developers (i.e. write software requirements brief): Sept- Oct 3.Choose software package: Oct-Nov 4.Write consultants brief: Nov 5.Tender process: Nov-Dec 6.Project delivery: Early 2011 with yearly calibrations 7.Maintenance and training: 2011 onwards

17 MODELLING PROJECT IMPLEMENTATION STEPS Discussion

18 MAIN OUTFALL SEWER DUPLICATION Main Outfall Sewer as a part of the overall network: MAIN OUTFALL SEWER DUPLICATION

19 GEELONG DISTRICT SEWER CATCHMENT

20 MAIN OUTFALL SEWER Characteristics: km long -1650mm dia -Strategic asset -Very shallow slope (1 in 3000) -Over 30 years old but in acceptable condition

21 MAIN OUTFALL SEWER AND ITS DUPLICATION MAIN OUTFALL SEWER -Close to reaching capacity in wet weather -We know it will need to be upgraded -The modelling program will provide better estimates of future flows and upgrade timelines -Running through major future development hence route needs to be decided before development occurs -Current capacity: 2000L/s -Predicted needed capacity (PWWF): 3600L/s -Will continue to transport all DWFs Development Boundary

22 AUGMENTATION OPTIONS Development Boundary Same route has been decided Three options: 1.Identical duplication 1 in 3000 grade). Price: ~80 mil. 2.Rising main (1100mm dia). Price: ~40 mil. 3.Pressure gravity sewer (1100mm 1 in 3000). Can be pressurized. Price: ~60mil.

23 DIFFERENCE IN PUMPED FLOW VOLUMES Option 2: Rising mainOption 3: Pressure Gravity Sewer

24 WINNING OPTION NUMBER 3: Pressure gravity sewer It provides significant advantages and very high flexibility, for a smaller price compared to an exact duplication. Questions?


Download ppt "GEELONG MODELLING PROGRAM AND FUTURE UPGRADES Mircea Stancu 25 June 2010."

Similar presentations


Ads by Google