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URBAN STREAM REHABILITATION

URBAN STREAM REHABILITATION. CASE STUDIES. Contents:. Approach Case studies Impacts of urban river rehabilitations Planning and implementation process Aesthetic evaluation methods Social appraisal and participation Rehabilitation techniques Summary and conclusions. 1 Approach.

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URBAN STREAM REHABILITATION

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  1. URBAN STREAM REHABILITATION

  2. CASE STUDIES

  3. Contents: • Approach • Case studies • Impacts of urban river rehabilitations • Planning and implementation process • Aesthetic evaluation methods • Social appraisal and participation • Rehabilitation techniques • Summary and conclusions

  4. 1 Approach • Survey on urban rehabilitation schemes (Europe, others) • Case study approach- urban setting - rehabilitation (ecological improvement) - scheme completed • Standardised enquiry form • Quantitative and qualitative analysis of each case • Comparison of tools, techniques, procedures and impacts

  5. 1. Approach

  6. Selected case studies • Comparison of General Characteristics  2. Case studies -Brief description

  7. Austria: Vienna - Wienfluss 2. Case studies -Brief description

  8. Germany: Munich – Isar 2. Case studies -Brief description

  9. Italy: Florence – Mugnone Brook 2. Case studies -Brief description

  10. Switzerland: Zurich – Brook Concept Albisrieder Dorfbach 2. Case studies -Brief description

  11. Czech Republic: Chrudim – Náhon 2. Case studies -Brief description

  12. 2. Case studies -Brief description

  13. Cananda: Toronto – Mud Creek 2. Case studies -Brief description

  14. United States: Wilmington – Christina River 2. Case studies -Brief description

  15. 2Case studies -Characterisation 1 Objectives of urban river rehabilitation 2 Objectives of ecological improvement 3 Length of urban river rehabilitation schemes 4 Total costs of urban river rehabilitation schemes 2. Case studies -Characterisation

  16. 2. Case studies -Characterisation

  17. 2. Case studies -Characterisation

  18. 2. Case studies -Characterisation

  19. 2. Case studies -Characterisation

  20. 3. Impacts of river rehabilitation schemes • Ecological impacts • Social impacts • Economic impacts • Impacts on public health and safety 3. Impacts of river rehabilitation schemes

  21. 3. Impacts of river rehabilitation schemes

  22. 3. Impacts of river rehabilitation schemes

  23. 3. Impacts of river rehabilitation schemes

  24. 3. Impacts of river rehabilitation schemes

  25. 3. Impacts of river rehabilitation schemes

  26. 3. Impacts of river rehabilitation schemes

  27. 4. Planning and implementation process • Initiation of urban river rehabilitation projects • Site selection • Project management • Almost 90 % public administration initiations • primary initiative usually from citizen groups • 20 % responding to legal demands • Most aim at rehabilitation of certain river section • Selection methods on basin or city scale, determination of potential for rehabilitation • 21% used some kind of site selection method 4. Planning and implementation process

  28. 4. Planning and implementation process

  29. 4. Planning and implementation process

  30. 5. Aesthetic Evaluation Aspects of Aesthetic Perception and Recreational Usability • extracted from Part B and Part C of the enquiry, state conditions and implemented measures • quite diverse understanding of what aesthetics for urban rivers is 5. Aesthetic Evaluation

  31. 5. Aesthetic Evaluation

  32. 5. Aesthetic Evaluation Aspects of Aesthetic Perception and Recreational Experience Aesthetic Evaluation Methods • expert assessments • surveys 5. Aesthetic Evaluation

  33. 5. Aesthetic Evaluation

  34. 6.Social appraisal and Public Involvement • Legal requirements for public participation • Stakeholders and Identification of Stakeholders • Informing stakeholders • Involving Stakeholders • Stewardshop and Advocacy 6.Social appraisal and Public Involvement

  35. legal requirements for public information and involvement have been mentioned for almost half of the projecs • how did project responsibles deal with this legislation? • involvement from public information to comprehensive participation of diverse stakeholder groups 6.Social appraisal and Public Involvement

  36. 6.Social appraisal and Public Involvement

  37. citzen: residents, property owners • NGOs on national, regional and local level • commercial assosiations (Anacostia River Business Coalition) • Politicians (Isar) • Identification of stakeholders (Kaitzbach, Skerne) 6.Social appraisal and Public Involvement - Stakeholders

  38. 6.Social appraisal and Public Involvement - Stakeholders

  39. increase of social awareness and appraisal • first step to public participation • Guided tours • Information boards onsite • Exhibitions • Installations 6.Social appraisal and Public Involvement – Informing Stakeholders

  40. 6.Social appraisal and Public Involvement – Informing Stakeholders

  41. Collection of ideas and site selection • competitions • surveys • workshops • public discussion meetings • on site involvement (Wandse, Toronto) 6.Social appraisal and Public Involvement – Involving Stakeholders

  42. 6.Social appraisal and Public Involvement – Involving Stakeholders

  43. active support for river enhancement through stakeholders • Partnerships: brook sponsorships, NGOs, coalitions • continuous activities: newsletter, guided tours, school days, monitoring • single events: inauguration of schemes, river related festivals • information for rivers non-project related 6.Social appraisal and Public Involvement Stewardship and advocacy

  44. 6.Social appraisal and Public Involvement Stewardship and advocacy

  45. 7. Rehabilitation techniques • Improving Water Quality • Improving Hydrology and Hydrodynamics • Improving Stream Connectivity • Restoration Techniques for Aquatic and Riverine Ecosystems • Techniques Incorporating Features to Improve Public Health and Safety • Measures Practiced Basin Wide 7. Rehabilitation techniques

  46. Groups of individual measures can be found aiming at the same rehabilitation target 7. Rehabilitation techniques – measure groups

  47. Measures: • wet ponds with extended detention • grassy filter strips • constructed wetlands • bioretention • structural enhancement • silt trapping devices 7. Rehabilitation techniques – water quality

  48. 7. Rehabilitation techniques – water quality

  49. measures ‘managing discharge from detention basins in accordance to natural runoff’, or ‘water management in collaboration with power plant’ to ‘master-planning advices for the catchment area’ • one fourth of case studies used stormwater infiltration for detaining peak flow • sediment balance: • sediment traps, such as sediment ponds, • check dams for sediment control • the management of construction sites (temporary runoff diversions and chutes) 7. Rehabilitation techniques – Hydrology and Hydrodynamics

  50. 7. Rehabilitation techniques – Hydrology and Hydrodynamics

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