Sussex Wetland Conference: Nigel Holmes
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Sussex Wetland Conference: Nigel Holmes

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Nigel Holmes

Nigel Holmes
Chalk Streams
Sussex Wetland Conference

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Sussex Wetland Conference: Nigel Holmes Presentation Transcript

  • 1. Chalk Streams of Sussex:Recognition, Protection & Enhancement Nigel Holmes & Fran Southgate: January 2012
  • 2. Planned Coverage•What are chalk streams?•Characteristics and Natural Variation•What do they typically look like?•Sussex chalk rivers – resource anddistribution•What do Sussex chalk streams look like?•Anything special about them?•PROTECTION REQUIRED.•REHABILITATION REQUIRED•Examples of chalk stream rehabilitation
  • 3. What are chalk streams? Official ‘BAP’ National Resource Reflects Chalk Geology Ems & Lavant only Sussex ones identified
  • 4. Perennial Chalk RiversChalk Geology = V V high BFI = V V Stable Flow
  • 5. Non-Chalk RiversImpervious (Clay) Geology = low BFI = ‘Flashy’ Flow
  • 6. Mixed Geology with Chalk - Perennial RiversMixed Clay/Chalk Geology = high BFI = Stable Flow with Bigger Troughs and Higher Peaks
  • 7. Natural Chalk Rivers/Stream often ‘Winterbournes’
  • 8. NATURALLLY Winterbourne
  • 9. NATURALLLY Winterbourne
  • 10. NATURALLLY Winterbourne
  • 11. NATURALLLY Winterbourne
  • 12. NATURALLLY Winterbourne
  • 13. NATURALLLY Winterbourne
  • 14. NATURALLLY Winterbourne
  • 15. NATURALLLY Winterbourne
  • 16. Perennial Chalk Streams - Meon
  • 17. Perennial Chalk Streams – Lambourn
  • 18. Perennial Chalk Streams – Kennet
  • 19. Perennial Chalk Streams – Itchen
  • 20. Sussex Chalk Streams: Distribution & Resource
  • 21. Sussex Chalk Streams: Distribution & Resource
  • 22. Sussex Chalk Streams: Are there more Fran asks!!?
  • 23. Sussex ChalkStreams: Bosham
  • 24. Sussex Chalk Streams: Bosham
  • 25. Sussex Chalk Streams: Bosham
  • 26. ScarpStreams - Arundel
  • 27. Scarp Streams – manywoodedbanks and woody debris features
  • 28. Scarp Streams - Dynamic
  • 29. ScarpStreams - Sutton
  • 30. Scarp Streams – Special Character: PROTECT
  • 31. Some Scarp Streams – V SpecialCharacter: PROTECT
  • 32. Some Not So Special Character:REHABILITATION POTENTIAL
  • 33. Key Quality Parameters
  • 34. Rehabilitation needed and can be easy
  • 35. Rehabilitationneeded and can be easy: just move bed materialsaround – Undo Historical ‘Flattening’!!!
  • 36. Rehabilitation needed and can be easy: just ‘Un-flatten’
  • 37. Rehabilitation needed and can be easy:but need helpin promotionthrough keen& pioneering landowners
  • 38. Rehabilitation neededand can be easy: need keen & pioneering landowners and vision
  • 39. Examples ofRehabilitation on SmallChalk Streams
  • 40. Examples of Rehabilitation on Small Chalk Streams
  • 41. Examples of Rehabilitation on Small Chalk Streams
  • 42. Examples ofRehabilitation on Small Chalk Streams
  • 43. Examples of Rehabilitation on Small Chalk Streams
  • 44. Examples of Rehabilitation on Small Chalk Streams
  • 45. Thanks & Keep up the Good Work