URBAN STREAM REHABILITATION INTRODUCTION OBJECTIVES AND IMPACTS Development

URBAN STREAM REHABILITATION

INTRODUCTION, OBJECTIVES AND IMPACTS

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

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

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

Phases in Unsustainable Urban Development Uncontrolled Urbanisation (Occupation) of Flood Plain Streams as Recipients of Solid & Liquid Wastes Problems with Flooding Defecation in nature Liquid & Solid waste 1. Introduction, objectives & impacts

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

Phases in Unsustainable Urban Development Sewers Connected to Channelised Streams 1. Introduction, objectives & impacts

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

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

Renaturalisation of Urban Streams Back to Nature…

Self-sustaining coping capacity BALANCE Natural co nditions 1. Introduction, objectives & impacts

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

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

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

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

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

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

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

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

Self-sustaining coping capacity IMBALANCE ! Degradation of aquatic environment Degradation of ecology 1. Introduction, objectives & impacts

Rehabilitation objectives REHABILITATION Improvement of the river state in: Physical characteristics Chemical quality Ecological diversity ? Aesthetical appearance 1. Introduction, objectives & impacts

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

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

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