1. URBAN STREAM REHABILITATION

2. CASE STUDIES

3. Contents: 1Approach 2Case studies 3Impacts of urban river rehabilitations 4Planning and implementation process 5Aesthetic evaluation methods 6Social appraisal and participation 7Rehabilitation techniques 8Summary and conclusions 8Summary and conclusions

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

5. 1. Approach

6. 1Selected case studies 2Comparison 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

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

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

15. 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 Case studies - Characterisation 2 Case studies - Characterisation 2. Case studies -Characterisation

20. 3. Impacts of river rehabilitation schemes schemes Ecological impactsEcological impacts Social impactsSocial impacts Economic impactsEconomic impacts Impacts on public health and safetyImpacts on public health and safety 3. Impacts of river rehabilitation schemes

27. Initiation of urban river rehabilitation projectsInitiation of urban river rehabilitation projects Site selectionSite selection Project managementProject management 4. Planning and implementation process Almost 90 % public administration initiationsAlmost 90 % public administration initiations primary initiative usually from citizen groupsprimary initiative usually from citizen groups 20 % responding to legal demands20 % responding to legal demands Most aim at rehabilitation of certain river sectionMost aim at rehabilitation of certain river section Selection methods on basin or city scale, determination of potential for rehabilitationSelection methods on basin or city scale, determination of potential for rehabilitation 21% used some kind of site selection method21% used some kind of site selection method 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 measuresextracted from Part B and Part C of the enquiry, state conditions and implemented measures quite diverse understanding of what aesthetics for urban rivers isquite diverse understanding of what aesthetics for urban rivers is 5. Aesthetic Evaluation

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

34. 6.Social appraisal and Public Involvement Involvement Legal requirements for public participationLegal requirements for public participation Stakeholders and Identification of StakeholdersStakeholders and Identification of Stakeholders Informing stakeholdersInforming stakeholders Involving StakeholdersInvolving Stakeholders Stewardshop and AdvocacyStewardshop and Advocacy 6.Social appraisal and Public Involvement

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

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

39. increase of social awareness and appraisalincrease of social awareness and appraisal first step to public participationfirst step to public participation Guided toursGuided tours Information boards onsiteInformation boards onsite ExhibitionsExhibitions InstallationsInstallations 6.Social appraisal and Public Involvement – Informing Stakeholders

41. Collection of ideas and site selectionCollection of ideas and site selection competitionscompetitions surveyssurveys workshopsworkshops public discussion meetingspublic discussion meetings on site involvement (Wandse, Toronto)on site involvement (Wandse, Toronto) 6.Social appraisal and Public Involvement – Involving Stakeholders

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

45. 7. Rehabilitation techniques Improving Water QualityImproving Water Quality Improving Hydrology and HydrodynamicsImproving Hydrology and Hydrodynamics Improving Stream ConnectivityImproving Stream Connectivity Restoration Techniques for Aquatic and Riverine EcosystemsRestoration Techniques for Aquatic and Riverine Ecosystems Techniques Incorporating Features to Improve Public Health and SafetyTechniques Incorporating Features to Improve Public Health and Safety Measures Practiced Basin WideMeasures 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

49. one fourth of case studies used stormwater infiltration for detaining peak flowone fourth of case studies used stormwater infiltration for detaining peak flow 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’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’ sediment balance: sediment traps, such as sediment ponds,sediment traps, such as sediment ponds, check dams for sediment controlcheck dams for sediment control the management of construction sites (temporary runoff diversions and chutes)the management of construction sites (temporary runoff diversions and chutes) 7. Rehabilitation techniques – Hydrology and Hydrodynamics

51. Longitudinal m.: Alignment and meanderingAlignment and meandering Biological continuityBiological continuity Techniques for longitudinal, vertical and lateral connectivity 1 Measures : drops were removed, ground ramps, fish ladders, daylightingdrops were removed, ground ramps, fish ladders, daylighting 7. Rehabilitation techniques – Improving Connectivity

53. pool and riffle zones were madepool and riffle zones were made Gravel beds and current deflectors have been successfully re-introducedGravel beds and current deflectors have been successfully re-introduced Vertical m.: BedformsBedforms Techniques for longitudinal, vertical and lateral connectivity 3 7. Rehabilitation techniques – Improving Connectivity

55. 8. Summary Most projects occur on streams and small riversMost projects occur on streams and small rivers Low number of completed urban rehabilitation schemesLow number of completed urban rehabilitation schemes Ecological aspects play an increasing roleEcological aspects play an increasing role Social aspectsSocial aspects Wide variety of soft techniquesWide variety of soft techniques Scarce use of evaluation methodsScarce use of evaluation methods Schemes need systematic performance controlSchemes need systematic performance control 8. Summary

56. 1. Case studies More info… For more information follow this link For more information follow this link

57. Speicher