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Dublin Region Water Supply Project Presentation for Shannon Protection Alliance, Dromineer, Co. Tipperary

This presentation discusses the background, current status, and the need for a new water supply in the Dublin region. It covers water supply options, stakeholder issues, evaluation methodology, and an overall summary of the project.

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Dublin Region Water Supply Project Presentation for Shannon Protection Alliance, Dromineer, Co. Tipperary

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  1. Presentation to Shannon Protection Alliance, Dromineer, Co Tipperary 4 March 2009 www.watersupplyproject-dublinregion.ie

  2. Presentation Content • Background / Current Status • Need / Extent / Timing – New Water Supply • Water Supply Options • Principal Stakeholder Issues • Option Evaluation Methodology / Evaluation Summary • Overall Summary

  3. Background / Current Status 1996 Strategic Study (DEHLG) 2000 Review of Strategic Study (3 Options) 2004/5 Feasibility Study 2006 Public Consultation (3 No) – (SEA Phase 1) 2007/8 Expanded Range of Options (10 No) – Assess 2008/9 Public Consultation SEA Phase2 – Nov 08 - Feb 09 2009 Shortlist / Preliminary Reports / Preferred Option 2009+ EIA / Public Consultation / An Bord Pleanala

  4. Need for New Water Supply Water Demand Growth • Population - 1.5m (2008)  2.2m (2031) • Leakage - 43% (1997)  30% (2008)  20% (2031) - Network Rehabilitation (€ 120m – 2007 / 2012) • Water Conservation - By-Laws / Awareness - Metering (non-domestic) • Economic Growth - Cyclical / Increase over Long Term

  5. Extent of Water Supply Requirement2016 / 2031 Average 170Ml/d Peak 80Ml/d Midlands 50 Ml/d Contingency 50 Ml/d Total 350Ml/d

  6. Abstraction – Flow Rates • 170 Ml/d (average Dublin requirement - 2031) ≈2m3/sec • 350 Ml/d (Peak + Midlands + Contingency - 2031) ≈4m3/sec • Average Shannon Flow Lough Ree ≈100 m3/sec • Average Shannon Flow Lough Derg ≈180 m3/sec • Peak Shannon Flow ≈800 m3/sec (Liffey Average Flow Leixlip ≈15 m3/sec)

  7. 850 800 Average Demand Projections 750 New Source Required 700 Ml/d 650 Planned Sustainable Production 600 SCENARIO 550 Medium Low Population Growth Rate Low / High Kildare (Barrow) Leakage at 2031 20% 16% 500 Water Conservation Pro-Active Pro-Active Medium Low Economic Growth Rate 450 Low / High 2003 2005 2007 2009 2011 2013 2015 2017 2019 2021 2023 2025 2027 2029 2031 2033 Year Timing of New Water SupplyRequirement

  8. Demand Supply Balance2007 - 2031 Average Dublin Region Demand 2007 – 540 Ml/day Average Dublin Region Demand 2031 – 800 Ml/day Dublin Region Existing Sources River Liffey River Liffey will always provide majority of water for Dublin Region

  9. Water Supply Options • General Comment • Options – not all of equal merit • Capacity Problems • Options – Storage (former bogs) – Environmental (favoured) • Cost

  10. Athy River Barrow G-Impoundment- Lough Ree [Derg] I-Fingal / Kildare Groundwater E- Lough Ree + Storage A-Lough Ree C-Parteen Basin J-Liffey / Barrow B-Lough Derg D-Lough Ree +Lough Derg F- Lough Derg + Storage Options H-Desalination MULLINGAR Desalination Plant Lough Ree H Wells A G I Ballycoolen E E ATHLONE D F1 TerminationPoint Former Bogs TULLAMORE F2 River Shannon G Impoundment Ballymore Eustace F Poulaphuca Lake B Lough Derg J SLIEVE BLOOM MOUNTAINS PORTLAOISE Killaloe Parteen Basin Head Race C River Shannon ESB Ardnacrusha

  11. LOUGH REE G-Impoundment- Lough Ree [Derg] E- Lough Ree + Storage D-Lough Ree +Lough Derg A-Lough Ree MULLINGAR Lough Ree A E ATHLONE D TerminationPoint Former Bogs TULLAMORE River Shannon G Impoundment Lough Derg PORTLAOISE

  12. Lough Ree (A, D, E, G) • Sluice Operations – Water Levels / Downstream Flows (min 12m3/sec) • Current Operation (ESB / WI Regs) – Balance Navigation / Flooding • Hydrological Modelling of Shannon & Abstraction Impacts • Abstraction – Modify Sluice Operations / Increase Seasonal Flood Risk • Abstraction – Increase Min Flow Durations (Dry Periods) • Flood Risk Increase / Increased Duration Min Flows – Environmental Issues Lough Ree / Callows

  13. LOUGH DERG PARTEEN BASIN F- Lough Derg + Storage Options B-Lough Derg C-Parteen Basin Lough Ree MULLINGAR ATHLONE F1 TerminationPoint Former Bogs F2 TULLAMORE River Shannon F B Lough Derg SLIEVE BLOOM MOUNTAINS PORTLAOISE Killaloe Parteen Basin Head Race C River Shannon ESB Ardnacrusha

  14. Lough Derg / Parteen Basin (B, C, F) • Storage Reservoir – Ardnacrusha (ESB) • Water Levels – Normal Range 460mm / 18” • ESB Abstraction – 170 m3/sec avg – 400 m3/sec max ( zero min) • Shannon River 10m3/sec min • Abstraction Dublin – Reduces ESB Abstraction eg 170 m3/sec – 4 m3/sec = 166m3/sec avg • Water Levels Not Impacted • Residence Time (L Derg in Dry Periods) – Offset by Storage

  15. Lough Derg / Parteen Basin– Average Flows & Abstractions With Abstraction No Abstraction 4m3/s (max) Lough Derg Lough Derg 180m3/s (avg) 176m3/s (avg) Killaloe Killaloe Parteen Basin Parteen Basin Parteen Weir Parteen Weir 170m3/s (avg) 166m3/s (avg) 10m3/s (min) 10m3/s (min) Ardnacrusha Ardnacrusha Limerick Limerick

  16. Athy River Barrow OTHER SOURCES I-Fingal / Kildare Groundwater J-Liffey / Barrow H-Desalination MULLINGAR Desalination Plant Lough Ree H Wells I Ballycoolen ATHLONE TerminationPoint TULLAMORE River Shannon Impoundment Ballymore Eustace Poulaphuca Lake Lough Derg J PORTLAOISE

  17. Desalination • Technically Feasible • Technology Improving Continuously • Increased Usage (Israel / Southern Med / Spain / Australia etc) • High Energy Requirement & Carbon Footprint • Environmental Issue – Brine Dispersion • Expensive (40% more than most expensive Shannon option)

  18. Other Sources Assessed Groundwater Specialist Study – Eugene Daly & Associates • Estimated 110Mld “Developable Resource”– 80km radius Dublin • Technical / Planning / Legal / Economic Risk Liffey & Barrow Conjunctive Use • Operational Issues • Flood Risk / Inefficient • Capacity 20Mld - 40Mld

  19. Principal Issues(Consultations to date) Socio – Economic - Navigation / Tourism - Angling / Fisheries - Agriculture / Local Economy - Water Local Use / Flooding Environmental - Flows / Levels / Residence Times - Climate Change - Water Quality - SAC / SPA / NHA Water Conservation - Leakage / Metering • All Issues Addressed during Assessment of Options • Technical & Environmental Reports • Website / Questions & Answers

  20. Option Evaluation Methodology Principles • Water Supply Scheme must be Sustainable – Environmental / Economic / Socio-Economic (Balance) • Abstraction of Water can not be at the expense of any other community Methodology (assessment of options / sustainability criteria)

  21. Option Evaluation Summary (Draft)

  22. Strategic Environmental Assessment & HDA(environmentally favoured)

  23. Strategic Environmental Assessment & HDA Other Benefits • Treated Water Supplies – Offaly / Westmeath • Lough Owel – Supplies to Royal Canal • Focus on Water Quality (Strategic Supply Source) • Midlands Environmental Parks • Hydrological Model – Enhanced Shannon Management (ShIRBD)

  24. Summary • New Supply Required – Dublin Region – Approx 2016 + • 10 Supply Options Evaluated – Tech / Env / Econ / Socio-Econ • Public Consultation : 24 Nov 2008 – 27 Feb 2009 • Evaluation of Feedback / Shortlist – Sustainable Development • Preliminary Report (s) – Shortlisted Options • No Decision Made • Recommendation to DCC / DEHLG – Autumn 2009 • Post 2009 – Formal Planning Process (An Bord Pleanala) • Multiple future opportunities for formal and informal consultation • Extensive feedback to date

  25. Consultation to date • Website www.watersupplyproject-dublinregion.ie • 1,950 Visits • 10,000 Page Views • Stakeholder Presentations • General communication • email, phonecall, post – 147 No.

  26. www.watersupplyproject-dublinregion.ie

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