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

Sewers Connected to Channelised Streams 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

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

Renaturalisation of Urban Streams Back to Nature…

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

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

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

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

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

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

BALANCE 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

? 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

IMBALANCE ! 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

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

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

? REHABILITATION Improvement of the river state in: 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

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

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