Urban futures


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Urban futures

  1. 1. Urban Futures A sustainable City
  2. 2. A sustainable CityTask: In a group of 4, think of how can we have a sustainable living in a city.
  3. 3. You should ask these questions to yourself..
  4. 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. 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. 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. 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. 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. 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. 10.  Extensive urban green space has been developed with one and a half million trees have been planted
  11. 11. Areas prone to flooding have been turned to wetlands
  12. 12. Public transport is high quality and cheap to use.
  13. 13. The city centre is pedestrianised
  14. 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. 15. Key features of a sustainable city..
  16. 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. 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.