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Urban Futures
A sustainable City
A sustainable City
Task:
In a group of 4, think of how can we have a
sustainable living in a city.
You should ask these questions to yourself..
Sustainable urban development in LEDCs
A sustainable futures require:
Use of appropriate technology, materials and design
Acceptable minimum standards of living
Social acceptability of projects
Widespread public participation
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
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.
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
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
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:
CongestionPollutionUnder-employmentUnsanitary living conditionSquatter settlement
Extensive urban green space has been developed with one and a half million trees have been planted
Areas prone to flooding have been turned to wetlands
Public transport is high quality and cheap to use.
The city centre is pedestrianised
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
Key features of a sustainable city..
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
Options for sustainability..Compact cities:
minimise the amount of distanceUse less spaceRequires less infrastructureReduce urban sprawl
But is the city is too large, an area becomes:CongestedOvercrowdedOverpriced Polluted
* Then it becomes unsustainable.