dr roger wade environment agency l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Dr Roger Wade Environment Agency PowerPoint Presentation
Download Presentation
Dr Roger Wade Environment Agency

Loading in 2 Seconds...

play fullscreen
1 / 12

Dr Roger Wade Environment Agency - PowerPoint PPT Presentation


  • 378 Views
  • Uploaded on

Dr Roger Wade Environment Agency. Severn Tidal Impoundments Environmental Unknowns. The role of the Environment Agency. Regulator Operator Advisor. Hydraulics and Geomorphology. Erode or Deposit? The impact on Flood Defence. – May have some benefit but other impacts.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

Dr Roger Wade Environment Agency


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
    Presentation Transcript
    1. Dr Roger WadeEnvironment Agency Severn Tidal Impoundments Environmental Unknowns

    2. The role of the Environment Agency • Regulator • Operator • Advisor

    3. Hydraulics and Geomorphology Erode or Deposit? The impact on Flood Defence. – May have some benefit but other impacts.

    4. Climate change impacts drainage coastal development channel morphology UPSTREAM DOWNSTREAM defences natural habitats de-commissioning

    5. Water Quality and Quantity Water Quality Algal activity –( eutrophication). Could be added cost Water Resources – future availability? May be improved.

    6. Fish and habitats directive. • The estuary is an important nursery area for fish • Over 100 species are found • Some species are protected by the Habitats Directive • Over 25% of the salmon in England and Wales spawn in the rivers affected • Twaite Shad spawn in 4 rivers in the UK- 3 of which are upstream of the Cardiff Weston Barrage. • Compensation for any loss may not be possible. • We do know turbines kill fish.

    7. Proposed turbine designa 7m diameter “Straflo” turbine 9 OR 10m proposed for Severn. AT 60 rpm BLADE TIP VELOCITY WOULD EXCEED 30 M/S

    8. turbine mortality (source STPG, from SDC Report 2007). Salmon - adults = 40% - smolts = 10% Eels adult = 28% Shad juvenile = 53%

    9. EUROPEAN EEL – Anguilla anguilla European Eels in decline and now protected by Eel Regulations. Valuable commercial net fishery for elvers Long lifetime (up to 30 years ) makes prediction of impact very difficult

    10. Annapolis (Bay of Funday)- 0.2 % energy of Cardiff – Weston.

    11. The Environment • Messages from the Bay of Fundy-Eric Van Walsum • “Environmental Issues need to be part of the Design”

    12. Conclusions • The last 30 years – knowledge gaps • Unknowns and risk • The Challenge! Can we find an option to produce energy and not respect the environment?