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Water Supply Project Presentation: Towards Shannon Protection Alliance

This presentation highlights the need for a new water supply outlining background, current status, stakeholder issues, and evaluation methodology. With growing water demand and infrastructure improvements, the project aims to meet future supply requirements and protect the Shannon region. Various water supply options, including storage, environmental solutions, and desalination, are evaluated based on capacity, cost, and sustainability. The presentation emphasizes the balance between water demand projections and sustainable production, considering factors like population growth, leakage rates, and economic development. Stakeholders, including communities, regulatory bodies, and environmental groups, play a crucial role in shaping the selected water supply option. The presentation also discusses the hydrological modeling of the Shannon River and potential impacts of abstraction on the environment. Overall, the project seeks to address water scarcity challenges through strategic planning and stakeholder collaboration.

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Water Supply Project Presentation: Towards Shannon Protection Alliance

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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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