1 / 27

URBAN STREAM REHABILITATION

URBAN STREAM REHABILITATION. INTRODUCTION, OBJECTIVES & IMPACTS. TECHNIQUES OF REHABILITATION. BENEFITS / IMPACTS. AESTHETICS. SELECTION OF OBJECTIVES FOR REHABILITATION SCHEMES. U R B A N S T R E A M R E H B I L I T A T I O N. OPTIONS FOR REHABILITATION.

melvin-hansen
Download Presentation

URBAN STREAM REHABILITATION

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. URBAN STREAM REHABILITATION

  2. INTRODUCTION, OBJECTIVES & IMPACTS TECHNIQUES OF REHABILITATION BENEFITS / IMPACTS AESTHETICS SELECTION OF OBJECTIVES FOR REHABILITATION SCHEMES U R B A N S T R E A M R E H B I L I T A T I O N OPTIONS FOR REHABILITATION CASE STUDIES SITE MONITORING SOCIAL APPRAISAL TOOLS FOR ASSESSING POTENTIAL INDICATORS OF SUCCESS

  3. TECHNIQUES FOR REHABILITATION

  4. Measures to lessen the volume of runoff on the source Evapotranspiration 10-40% Can similar effect be achieved in urban areas ? Infiltration Up to 50% Natural conditions 2. Techniques for rehabilitation

  5. Measures to lessen the volume of runoff on the source MEASURES Vegetated roof covers (VRC) 2. Techniques for rehabilitation

  6. Measures to lessen the volume of runoff on the source Vegetated roof covers (VRC) 2. Techniques for rehabilitation

  7. Measures to lessen the volume of runoff on the source MEASURES Vegetated roof covers (VRC) Porous pavement: Asphalt Porous pavement: Modular-paving blocks 2. Techniques for rehabilitation

  8. Measures to lessen the volume of runoff on the source Porous pavement: Modular-paving blocks 2. Techniques for rehabilitation

  9. Measures to improve the quality ofrunoff MEASURES Grassy vegetative filter strips Grassed swales 2. Techniques for rehabilitation

  10. Measures to improve the quality ofrunoff Grassed swales Inflow Inflow Attenuation and conveyance Some interflow and infiltration 2. Techniques for rehabilitation

  11. Measures to improve the quality ofrunoff MEASURES Grassy vegetative filter strips Grassed swales Constructed wetlands 2. Techniques for rehabilitation

  12. Measures to improve the quality of runoff Constructed wetlands Contains a permanent pool of water Detention up to three weeks Attenuation, settlement, biological treatment Design for wildlife habitats Inflow Outflow 2. Techniques for rehabilitation

  13. Measures to control erosion and sedimentation MEASURES Management of construction sites – Construction traffic Temporary runoff diversions and chutes Silt fence and trapping devices Sediment basins Hydro seeding and chemical stabilization Cover crops and temporary mulches 2. Techniques for rehabilitation

  14. Measures to control erosion and sedimentation Cabled articulated block “Erosion Control in Florida's Little Wekiva River” by Mary Brabham and Jeff Cole 2. Techniques for rehabilitation

  15. Measures to detain peak flow MEASURES Dry detention basins Wet detention basins 2. Techniques for rehabilitation

  16. Measures to minimize pollution from sewage MEASURES Combined sewer overflow source control Off-line storage of combined sewage 2. Techniques for rehabilitation

  17. Measures for urban stream rehabilitation in channel bed and banks Channel reconstruction through transverse structures on the streambed MEASURES Sills as transverse structures Rough bed ground ramps/ rock ground ramps Block ramp Racks Cobble or gravel liners 2. Techniques for rehabilitation

  18. Measures for urban stream rehabilitation in channel bed and banks Channel reconstruction through transverse structures on the streambed Sills as transverse structures 2. Techniques for rehabilitation

  19. Measures for urban stream rehabilitation in channel bed and banks Channel reconstruction through transverse structures on the streambed Cobble or gravel liners 2. Techniques for rehabilitation

  20. Measures for urban stream rehabilitation in channel bed and banks Channel stabilization through stream parallel flow guiding structures MEASURES Branch packing Revetment - Piling revetment, slotted board revetment Double-row wattle palisade Vegetated slope grid Reed-roll revetment and biolog Vegetated rock rip-rap Tiered wall or pilings with bench plantings 2. Techniques for rehabilitation

  21. Measures for urban stream rehabilitation in channel bed and banks Protection and stabilization of stream banks Live stakes in existing riprap Salzburger Landesregierung, 2002, p.28 2. Techniques for rehabilitation

  22. Measures for urban stream rehabilitation in channel bed and banks Protection and stabilization of stream banks MEASURES Groynes, log cribbing deflectors, and current deflectors Live fascines/ fascine bundles/ sinking fascines Brush Layering Live willow racks Brush mattresses Wattle fence Live crib walls (syn. Krainer wall) Live slope grating Vegetated rock gabions Log, root wad, and boulder revetment 2. Techniques for rehabilitation

  23. Measures for urban stream rehabilitation in channel bed and banks Protection and stabilization of stream banks Live stakes Before implementation after sprouting after some months Salzburger Landesregierung, 2002, p.28 2. Techniques for rehabilitation

  24. Measures for urban stream rehabilitation in channel bed and banks Protection and stabilization of stream banks Example classical and bioengineering river rehabilitation Salzburger Landesregierung, 2002, p.13 2. Techniques for rehabilitation

  25. Measures for urban stream rehabilitation in channel bed and banks Protection and stabilization of stream banks Schematic river section with possible soil-bioengineering measures and zones of water management and riparian vegetation Schiechtl & Stern, 2001 p.7 2. Techniques for rehabilitation

  26. Measures for urban stream rehabilitation in channel bed and banks Protection and stabilization of stream banks A rehabilitated urban river (Fervença, Bragança, Portugal) Before (view from right bank) After (view from centre of river) 2. Techniques for rehabilitation

  27. More info… For more information follow this link: 2. Techniques for rehabilitation

More Related