contemporary urban environments 1 Flashcards
Why was 2008 a significant year?
by the end of 2008, 50% of people in the world lived in urban areas.
it was predicted that it would rise to 70% by 2050 even though cities occupy inly about 3% of the earths land surface.
what is meant by an urban area?
a built up area in which people live. (town or a city)
what is meant by urbanisation?
the growth in the population of a country’s population living in urban areas.
what is the cycle of urbanisation?
- urbanisation
- suburbanisation
- urban sprawl
- counter urbanisation
- reurbanisation
what happens at the urbanisation stage of the COU?
- increase in the proportion of people who live in urban settlements
the earliest stage in the growth of cities. it involves:
- rural to urban migration: mass movement of people from countryside to cities
- industrialisation: the growth of industry
- improvements in transport followed trains and cars developed quickly
when was the UK’s Industrial Revolution?
1760-1840
what happens at the suburbanisation stage of the COU?
the outward spread of built up areas, often at lower densities. people moving from the urban centre to the stage
this involves:
- social segregation as rich, with families move to more desirable areas (white flight)
- the growth of cities physically, spreading into the greenfield land around the city
- improvements in transport lead to a surge in commuting, car ownership more widespread, motorways, more complex rail network.
what happens at the urban sprawl stage of the COU?
- continued outward spread consuming farmland and smaller towns / villages leading to vast conurbations
this involves:
- continued increased improvements in transport
- improvements in communication allow working from home
- decentralisation as old industries begin to shut down
- changes in wealth and lifestyle
- inner city issues, i.e. poverty and deprivation
what happens at the counter urbanisation stage of the COU?
the movement of people and employment from major settlements to small settlements beyond the built up area.
THIS ONLY HAPPENS IN HIC CITIES AT PRESENT
it involves:
- changes in wealth, transport, lifestyle and communications
- changes in surrounding rural settlements (dormitory villages)
- changes in working habits
what happens at the reurbanisation stage of the COU?
- urban resurgence
- this can be seen in most western cities to a lesser or greater extent
- it can sometimes be planned or can be a more random event over a longer period of time
what is meant by urban resurgence?
the movement of people and employment back into its centres leading to regeneration.
what is meant by urban growth?
the increase in the total population of a town or city.
what are the causes of urban growth?
- natural increase - the difference between the birth and death rate
- rural to urban migration - the movement of people from the countryside to the city
why does natural population growth contribute to urban growth?
- urban areas tend to have higher percentage of younger people. they are the most fertile in the population.
- natural increase is the difference between the birth rate and the death rate
- in Mumbai, the fertility rate is 2.6 children per woman, with a declining death rate also
- Nappy Valley
why does rural to urban migration contribute to urban growth?
large numbers of people migrate from villages in the countryside to the main cities in search of a better life.
they migrate due to issues in the countryside and the attraction of a new life in the city.
what are examples of push factors?
- natural disasters such as floods, tropical storms, earthquakes. people flee rural areas and don’t return.
- wars and civil strife, eg. Sierra Leone
- high levels of local diseases and lack of medical provision
- population growth. same area of land has to support increased numbers. i.e. overarming, soil erosion and low yields.
what are examples of pull factors?
- earning money from the informal sector, e.g. prostitution, taxi services, selling goods on the street
- perceived better quality of life, fed by images in the media.
- employment in factories and services industries, which is better paid than work in rural areas. there is an increased demand for unskilled labour in cities.
- better quality social provisions. e.g. education, healthcare, entertainment.
what are the main consequences of urban growth?
- urban sprawl
- shortage of housing in LICs
- shortage of affordable housing in HICs
- lack of urban services and waste disposal
- unemployment and underemployment
- transport issues
what is urban sprawl?
defined as the spread of an urban area into the surrounding countryside.
why is urban sprawl a consequence of urban growth?
- requires more roads and infrastructure
- the reach into rural areas is one of the main causes of wildlife habitat loss
- causes more commuting from the suburbs to the city and thus more fuel consumption and traffic congestion
- can increase air pollution since a more car dependent lifestyle leads to an increase in fossil fuel consumption and emission of GG. areas may also experience higher temperatures.
- contributed to loss of farmland and open spaces, loss of fresh, local food. = greater food miles.
why is a shortage of housing in LICs a consequence of urban growth?
- population density tend to be high in urban areas and one of the consequences of this is a shortage in accommodation. leads to the presence of large areas of informal and often inadequate housing.
- these normally Devon on the city edge or in areas if low land value and prone to environmental hazards, e.g. flooding
- tend to have limited infrastructure
why is a shortage of affordable housing in HIC’s a consequence of urban growth?
- in the UK, rising demand for accommodation has led to a dramatic increase in both house prices and rental costs
- in parts of London, house prices rose by 50% between 2010-2015. was fuelled by in-migration, gentrification and purchasing of properties by wealthy foreign investors
why is a lack of urban services and waste disposal a consequence of urban growth?
- financial restraints in LICs can result in lack of basic services such as water + electricity.
- maintenance of infrastructure, e.g. road, sewers and drainage is also limited. can result in traffic congestion, polluted watercourses, flooding and disease.
- waste disposal increases every year. there are physical, economic and environmental restraints on its disposal.
- in Addis Ababa in Ethiopia, COA only able to deal with 2/3 of rubbish created.
why is recycling seen as an opportunity in Nairobi?
- old car tyres used when cut up to make shoes
- washing machine doors are used as kitchen bowls
- food waste is collected for animals and used on vegetation plots
- glass bottles are tenured to stores for selling
why is unemployment and underemployment a consequence of urban growth?
- because there is so many young people, there is much pressure to create jobs
- unemployment is typically high although official data is hard to find and many migrants find informal employment
- underemployment
what is meant by underemployment?
refers to a situation in which a person is not doing work that makes full use of their skills
why are transport issues a consequence of urban growth?
- the processes of urbanisation and suburbanisation have led to increase traffic in cities across the world
- this has created more congestion + pollution, damaging human health and wasting billions of £ in lost productivity
what is meant by a megacity?
a metropolitan area with a total population in excess of 10 million people
how many megacities currently exist?
38
what is meant by a world city?
cities which are seen to have an important role in the global economic system.
how are world cities categorised?
world cities are categorised into:
- alpha
- beta
- gamma
the alpha cities are the most important in the roles of the global economic system and are further categorised into:
- alpha ++
- alpha +
- alpha -
alpha++ is most important
what is meant by hyper urbanisation?
where the increase in the urban population is happening so fast that the city cannot cope with the needs of the people.
what are the three main contemporary urban processes in HIC cities?
- suburbanisation
- counter urbanisation
- urban resurgence
what is suburbanisation?
the increased movement of people/ service and industries from the centres of inner urban areas outwards, towards and onto the edges of the built up area.
when did suburbanisation begin?
- the suburbs continued to grow rapidly in all British cities in the inter-war and post-war periods.
- during this period, there were fewer planning regulations and urban growth took the form of ribbon development along main roads.
- the period 1800-1900 saw very rapid industrialisation
- the industry could pay the most for city centre sites
- unplanned housing developed around factories
- middle class families began to move into suburbs = white flight
what are the causes of suburbanisation?
- decentralisation
- attractions of edge city locations
- de-industrialisation
- technology
why is de-centralisation a cause of suburbanisation?
- shift of jobs towards service sector
- often tend to be in non-centralised locations to make use of cheaper land
- many service industries therefore located in the suburbs
why are attractions of edge city locations a cause of suburbanisation?
- access. e.g. motorways
- room to expand
- green space
- cheaper land
- pleasant environment
why is de-industrialisation a cause of suburbanisation?
- loss of manufacturing jobs in inner cities
- workers often lacked skills for jobs in service sectors
- inner cities experience a spiral of problems, e.g. unemployment, poverty.
why is technology a cause of suburbanisation?
- advances in transport meant people could commute longer distances
- ICT and communications developments meant more people can work from home
what are social effects of suburbanisation?
- urban sprawl
- development of science parks, shopping malls
- loss of social cohesion and identification as people dispersed through the city
- development of brownfield sites for decentralised employment
- suburban dwellers largely white middle class leaving some segregated inner city areas. AKA white flight.
- urban decay
- gentrification
what are economic effects of suburbanisation?
- urban sprawl
- development of science parks, shopping malls
- cost of cheaper land in the suburbs
- edge cities
- suburban dwellers largely white middle class leaving some segregated inner city areas. AKA white flight.
- development of brownfields sites for decentralised employment
- gentrification
- urban decay
what are environmental effects of suburbanisation?
- development of Greenfield sites for new housing estates
- green belt policies
- cost of cheaper land in the suburbs
- edge cities
- traffic congestion. increase in GG and pollution due to increased commuting.
- former industrial areas have a negative environment with lots of derelict factories.
- development of brownfield sites for decentralised employment
- infilling
what is meant by infilling?
the use of open space within a conurbation to build new houses or services, often close to where green belts restrict outward growth.
what is meant by counter urbanisation?
the movement of people from urban areas into the rural areas surrounding the city (beyond the green belt)
when did counter urbanisation begin?
began in Britain in the 1960s in particular, and by 1990 a net movement of 1700 people per year were leaving for rural areas.
why is counter urbanisation happening?
in England, green belts were established from 1995 to simply prevent the physical growth of large, built up areas; to prevent neighbouring cities and towns from merging.
this meant that the suburbs soon became full, and little land was left for new development.
who is leaving the suburbs and why?
- the most affluent and mobile people
- families with children (to avoid the possible disadvantages of city locations)
what factors have helped counter urbanisation?
technological change - fax, email, phones, internet. led to the growth of teleworking or electronic commuting. encourages rural living + work from home
freezers, telephone, TV - allow rural lifestyle without being isolated.
improvements in road, motorway networks - make commuting easier, encouraging people to move out from the cities
urban renewal processes - during 50s + 60s meant that due to slum clearance large numbers of people had to move out from inner city slum areas. most were rehoused on council estates on edges of cities or in overspill settlements.
what case study is used for suburbanisation?
St Ives
where is St Ives?
St Ives is in Cambridgeshire, 70 miles north of London.
It is 18miles from Cambridge along the A14.
why is Cambridge attractive to commuters?
it has good road access and rail links to Cambridge and London.
many people commute into Cambridge. around 1/4 of working population commute into London each day.
what are push factors of St Ives?
- flooding problems. st ives is on the River Great Ouse and has a history of flooding problems. as demand for housing grows, new housing has been built on the banks of the river in the centre of town and floodplain. poses great risk.
- fear of crime.
- expensive to repair old houses.
- village becoming dormitory settlements.
- traffic congestion and parking shortages.
what are positive consequences of suburbanisation for St Ives?
- shops & services. now more shops + services. such as clothes hops and cafes and restaurants.
- journey times are quicker due to new railway lines which are electrified.
- new services to support growing population.
- house owners benefit from increased value of their property.
- migrants bring business with them creating employment.
what are the pull factors of St Ives?
- retirement.
- housing in area is affordable. e.g. value for money. in Surbiton, £300,000 buys 2 bed. would buy 4 bed in St Ives.
- work flexibility due to better communication.
- more schools. plans to expand primary schools to make 240 new places available.
- of 200 planned new homes = 75 will be affordable housing for those on lower incomes.
- houses in smaller settlements and rural areas are less cramped. houses are bigger w/ more open space.
what are negative consequences of suburbanisation for St Ives?
- traffic. congestion is an issue, esp during rush hour on A14.
- air and noise pollution increase.
- has caused conflicts between developer and environmental protection groups.
- rural roads and infrastructure may struggle to cope with additional traffic.
- rising house prices. avg detached house in 2000 = £130,000 to £210,000 in 2010. commuters earn higher wages than locals. can afford higher prices.
- green belt being built on.
- loss of community spirit.
what are management techniques used to manage suburbanisation in St Ives?
- flood protection. after flooding in 1998 and 2003, protection costing £8.8 million was completed in 2007. e.g. flood walls and new embankments.
- transport. £116 million guided busway liking St Ives and Huntingdon and Cambridge to reduce congestion.
- new houses. plans were approved in 2010 to build 200 new homes in St Ives.
what is urban resurgence?
the movement of people back to live in old, inner city areas which have been redeveloped.
what are the 2 main processes of urban resurgence?
- gentrification
- property led regeneration schemes