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Urban futures

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  • 1. Urban Futures A sustainable City
  • 2. A sustainable CityTask: In a group of 4, think of how can we have a sustainable living in a city.
  • 3. You should ask these questions to yourself..
  • 4. Sustainable urban development in LEDCsA sustainable futures require: Use of appropriate technology, materials and design Acceptable minimum standards of living Social acceptability of projects Widespread public participation
  • 5. Main dimensions of sustainable development are.. Provision of adequate shelter for all Improvement of human settlement management Sustainable landuse planning and management Integrated provision of environmental infrastructure:  Water, sanitation, drainage and solid waste management Sustainable energy and transport system Settlement planning in disaster prone areas
  • 6. Sustainable city case study: Curitiba, Brazil Curitiba, a city in SW Brazil, an excellent model for sustainable urban development. It has experience a rapid urban population growth from 300,000 in 1950 to over 2.1 million in 1990 but managed to avoid all the problems with such expansion.
  • 7. Problems…(1950s & 1960s) Many streams had been covered to form underground canals which restricted water flow Houses and other buildings had been built too close to river New buildings were built on poorly drained land on the periphery of the city Increased in roads and concrete surfaces accelerated runoff
  • 8. Solution late 1960s onwards.. Natural drainage was preserved – these natural flood plains are used as parks Certain low-lying areas are off-limits Parks have been extensively planted with trees; existing buildings have been converted into new sports and leisure facilities Bus routes and bicycle paths integrate the parks into the urban life of the city
  • 9. Curitiba – A model sustainable city Although Curitiba has grown from 300,000 in 1950 to 2.2m in 2000, the city has avoided the worst of usual problems of: Congestion Pollution Under-employment Unsanitary living condition Squatter settlement
  • 10.  Extensive urban green space has been developed with one and a half million trees have been planted
  • 11. Areas prone to flooding have been turned to wetlands
  • 12. Public transport is high quality and cheap to use.
  • 13. The city centre is pedestrianised
  • 14.  Recycling all forms of waste products is given a high priority 70% households separate recycle rubbish, In squatter settlement, food and bus fare are exchanged for garbage
  • 15. Key features of a sustainable city..
  • 16. Options for sustainability Reduce the use of fossil fuel Promote public transport Keep waste production to within levels that can be treated locally Provide sufficient green spaces Reuse and reclaim land Encourage active participation of local community Conserve non-renewable resources Use renewable resources
  • 17. Options for sustainability.. Compact cities:  minimise the amount of distance  Use less space  Requires less infrastructure  Reduce urban sprawl But is the city is too large, an area becomes:  Congested  Overcrowded  Overpriced  Polluted * Then it becomes unsustainable.

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