URBAN STREAM REHABILITATION

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. INTRODUCTION, OBJECTIVES AND IMPACTS

4. Development of the urban areas Cropland, Animals Rural homes Suburban development Industrial development Urban 1. Introduction, objectives & impacts

5. Phases in Unsustainable Urban Development Early Civilisation - Living in Nature – River banks free to move and water may flood Danger in nature Living in caves 1. Introduction, objectives & impacts

6. Phases in Unsustainable Urban Development Early Civilisation - Living in Nature - Low Level of Pollution Living in caves Defecation in nature 1. Introduction, objectives & impacts

7. Phases in Unsustainable Urban Development Moving to Streams - Beginning of Conflicts Flood Dangers in nature Erosion 1. Introduction, objectives & impacts

8. Phases in Unsustainable Urban Development Moving to Streams - Beginnings of Pollution Garbage Defecation in nature 1. Introduction, objectives & impacts

9. Phases in Unsustainable Urban Development Uncontrolled Urbanisation (Occupation) of Flood Plain Streams as Recipients of Solid & Liquid Wastes Problems with flooding and banks fixing Defecation in nature Bank protection Liquid & Solid waste 1. Introduction, objectives & impacts

10. Phases in Unsustainable Urban Development Channelisation of Urban Streams Recipients of Solid & Liquid Wastes - Wastes & Stormwater Problems with Flooding & Clogging Liquid & Solid waste 1. Introduction, objectives & impacts

11. Phases in Unsustainable Urban Development Sewers Connected to Channelised Streams Houses in Flood Prone Area 1. Introduction, objectives & impacts

12. Phases in Unsustainable Urban Development Uncontrolled Urbanisation in the Upper Parts of a Stream Building of Separate Sewers - Problem of Inlet Clogging 1. Introduction, objectives & impacts

13. Phases in Unsustainable Urban Development Renaturalisation of Urban Streams Back to Nature 1. Introduction, objectives & impacts

14. Renaturalisation of Urban Streams Back to Nature…

15. Natural conditions Freedom coping water and sediment flow BALANCE or NO BALANCE 1. Introduction, objectives & impacts

16. Natural conditions Freedom coping water and sediment flow Action to correct 1. Introduction, objectives & impacts

17. Freedom coping water and sediment flow IMBALANCE ! 1. Introduction, objectives & impacts

18. Natural conditions Self-sustaining coping capacity BALANCE 1. Introduction, objectives & impacts

19. Self-sustaining coping capacity Point source Pollution SELF-PURIFICATION 1. Introduction, objectives & impacts

20. Self-sustaining coping capacity Point source Pollution Self purifying (coping capacity potential) BALANCE 1. Introduction, objectives & impacts

21. Self-sustaining coping capacity Point source Pollution WASTE WATER TREATMENT Self purifying (coping capacity potential) 1. Introduction, objectives & impacts

22. Self-sustaining coping capacity Point source Pollution Self purifying (coping capacity potential) BALANCE Waste water treatment 1. Introduction, objectives & impacts

23. Self-sustaining coping capacity Point source Pollution Self purifying (coping capacity potential) SELF-PURIFICATION Waste water treatment Diffuse source Pollution 1. Introduction, objectives & impacts

24. Self-sustaining coping capacity Point source Pollution Self purifying (coping capacity potential) BALANCE Waste water treatment Diffuse source Pollution Self purifying (coping capacity potential) 1. Introduction, objectives & impacts

25. Self-sustaining coping capacity Point source Pollution ? Self purifying (coping capacity potential) Waste water treatment Diffuse source Pollution Self purifying (coping capacity potential) 1. Introduction, objectives & impacts

26. Self-sustaining coping capacity Point source Pollution Self purifying (coping capacity potential) Waste water treatment IMBALANCE ! Diffuse source Pollution Self purifying (coping capacity potential) 1. Introduction, objectives & impacts

27. Self-sustaining coping capacity Freedom coping water and sediment flow IMBALANCE ! Degradation of aquatic environment Degradation of ecology Flood risks 1. Introduction, objectives & impacts

28. Rehabilitation objectives REHABILITATION Improvement of the river statein: Physical characteristics Chemical quality ? Ecological diversity Aesthetical appearance Flood risk 1. Introduction, objectives & impacts

29. Rehabilitation objectives REHABILITATION Improvement of the river statein: Creation of habitats for bio-diversity ? Aesthetics (Amenities) Social improvement Maintenance cost 1. Introduction, objectives & impacts

30. Rehabilitation impacts REHABILITATION The main benefits are: Social benefits Aesthetic benefits Nature Safety 1. Introduction, objectives & impacts

31. More info… For more information follow this link: 1. Introduction, objectives & impacts