1 Water Services Training Group 19 th Annual Conference Optimising Services Delivery in the Water Industry Radisson Blu Hotel Sligo, 3 rd. September 2015.

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Presentation transcript:

1 Water Services Training Group 19 th Annual Conference Optimising Services Delivery in the Water Industry Radisson Blu Hotel Sligo, 3 rd. September 2015

Optimising Services Delivery in the Water Industry Wastewater Network Asset & Model Data Review and New Irish Water Standards Francis Finnerty Modelling and Long Term Planning Specialist Irish Water

Wastewater Networks 1. Why we need reliable Asset Information and Models 2. What data coverage and quality do we presently have  Review of GIS & Models 3. Strategy to improve wastewater network data  Drainage Area Plan Stages  Irish Water Standards Contents

Many reasons including:  Need to understand performance RISKS  Need to understand CAPACITY availability  Need to identify appropriate INTERVENTION STRATEGY  Benefits for OPERATIONS & service to the CUSTOMER! 1. Why We Need Reliable Asset Information and Models

RISKS  Hydraulic – flooding  Verified historic?  Model predicted?  Root cause?  Environmental  interaction with water bodies  Operational, Service  blockages, m&e failure  Structural  collapses 1. Why We Need Reliable Asset Information and Models Reliable Asset and Model Data essential for event frequency & consequence estimation

CAPACITY  Availability  Short term, long term planning  Impact of Growth, Climate Change, Urban Creep, Inflow & Infiltration INTERVENTION STRATEGY  Need to better understand wastewater flow  Domestic, Commercial  Infiltration – groundwater, rainfall induced, tidal  Inflow 1. Why We Need Reliable Asset Information and Models Reliable Asset & Model Data essential for existing & future capacity estimations and determining intervention strategy.

2. What data coverage and quality do we presently have Overview of: A.GIS Coverage and Confidence levels B.Hydraulic Models – Coverage and Confidence levels

 Multiple data sources  National assessment now possible  270,000 nodes  11,000km pipe 2. GIS Review Wastewater Pipes on IW GIS

Contains some data, such as levels & inverts, from records Significant Urban Centre Coverage Contains no attribute data. Points and lines only

Summary  130 agglomeration/sub-catchment hydraulic models in library  Some large urban agglomerations have no model  80% over 10 years old  Model maintenance generally not undertaken  Inconsistent modelling approaches  Auditing – a rare occurrence 2. Model Collection & Review

DEFICIT IN UNDERSTANDING OF WASTEWATER NETWORK ASSETS, RISKS AND PERFORMANCE  Further Asset Surveys Required  New Models Required 2. GIS and Model Review Conclusion

3. Strategy to improve wastewater network data  Use of the staged Drainage Area Plan process  New Irish Water Standards  Drainage Area Plan  Asset Surveys  Hydraulic Modelling

Stage 1 Data Collection & Review, Survey & Study Scoping Stage 1 Data Collection & Review, Survey & Study Scoping Stage 2 Surveys + Model Build & Verification Stage 2 Surveys + Model Build & Verification Stage 3 Risk Assessment & Needs Identification (Current, Short term, Long term) Stage 3 Risk Assessment & Needs Identification (Current, Short term, Long term) Drainage Area Plan (DAP) - Stages Stage 4 Options & Solutions Stage 4 Options & Solutions Interventions Update GIS + Models

 Data Collection  Data Review  Scoping  Study Requirements  Survey Requirements  New Stage 1 Report Template developed DAP Stage 1

 Asset Surveys  CCTV  Manhole  Ancillaries – CSOs  Pumping Station  Model Build  Flow & Rainfall Survey  Model Verification DAP Stage 2 Sewer Pipe CCTV Standard (Draft) Below Ground Asset Survey Standard (Draft) Hydraulic Model Build and Verification Standard New Standards

Key Requirements Build & Verification to facilitate an AUDIT Build and Verification must be based on EVIDENCE Historical Verification Survey Verification – short term surveys, long term monitoring, impermeable area analysis Reporting must detail CONFIDENCE levels for all areas of the network Stage 2 - Model Build & Verification Standard

Contents Include: QA Information Notes for model build Model build process guidance – e.g. boundary conditions, roughness, flow components etc. Application of runoff equations Planning & management of flow surveys Acceptable calibration and verification Deliverables to Irish Water Flow monitor verification sheets Outputs for corporate GIS Stage 2 - Model Build & Verification Standard

 New Standard (draft)  Risk assessment  Needs Identification  Current, Short term & long term development scenarios  Policies under development include:  Climate Change  Urban Creep  Basements  Environmental  Hydraulic, Design Rainfall Stage 3 Risk Assessment & Needs Identification

1. We need reliable Asset Information and Models To understand Risk, Capacity and Intervention Strategies are three reasons 2. GIS: 40% of our wastewater network is not represented. A further 30% is low to medium confidence data. Hydraulic Models: Variable coverage and many are outdated 3. Strategy to improve wastewater network data includes  Drainage Area Plans  New Irish Water Standards  Model and GIS Maintenance Summary