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CARDIFF EAST: MAXIMISING THE USE OF HISTORIC SEWERAGE ASSETS

David Evans Jeremy Jones. CARDIFF EAST: MAXIMISING THE USE OF HISTORIC SEWERAGE ASSETS. Trehafod Storm Tank. Rhondda Valleys. Y&P Trunk Sewer. Cardiff East. Kimberley Road CSO. Tongwynlais CSO. Aberporth Road CSO. Eastern District Pumping Station. Cardiff WwTW.

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CARDIFF EAST: MAXIMISING THE USE OF HISTORIC SEWERAGE ASSETS

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  1. David Evans Jeremy Jones CARDIFF EAST: MAXIMISING THE USE OF HISTORIC SEWERAGE ASSETS

  2. Trehafod Storm Tank Rhondda Valleys Y&P Trunk Sewer Cardiff East Kimberley Road CSO Tongwynlais CSO Aberporth Road CSO Eastern District Pumping Station Cardiff WwTW Cardiff East / Y&P Catchments

  3. LAG Cardiff East Catchment Y&P Trunk Sewer Long Drain Down Times Storm Responsive 5 Year 600 Min Storm

  4. To Sea Kimberley Road Newport Road Eastern District Pumping Station Lower Cardiff East / Y&P Catchments

  5. ANCILLARIES Catchment Split into Sub-Areas

  6. Control - Principles • Split catchment into sub-areas where flooding locations are known and understood • Each sub-area to have: • Primary point of relief sufficient to manage flood risks • Secondary point of relief for when operation of primary point is impaired • Co-ordinate points of relief in the event that rising sewer levels need a strategic / catchment wide response

  7. Cynon Trehafod Kimberley Road Newport Road Tongwynlais Rumney Hill Hailey Park Eastern District Pumping Station MONITORING POINT Aberporth Road CONTROL POINT Monitoring and Control Points ANCILLARIES

  8. Control Algorithm

  9. Control – Overall Aims • To manage the transport capacity and to ensure that flows are managed as necessary, stored within the Catchment or split under extreme storms • To maximise the use of the storage (previously tidal) before spilling • To eliminate any risk of flooding in 1 in 5 year event • To manage the risks of flooding up to 1 in 30 year event • To provide a risk management strategy for failures within the system

  10. Manage flood risks for Dŵr Cymru Welsh Water Remove stormwater from system at strategic locations Monitor, monitor and monitor system performance Improve system serviceability / longevity Dialogue between Capital and Operations staff Approval of Environment Agency Integrated Catchment Plan

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