Urban Environments Flashcards

1
Q

What is an urban area?

A

Built up area that forms part of a city or town

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2
Q

What are informal and formal activities?

A

Informal: untaxed, unregulated jobs

Formal: taxed, regulated activities

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3
Q

What is suburbanization?

A

Outward growth of towns and cities to engulf surrounding villages and rural areas
Creates middle-class suburbs
Caused by improved public transit, available land, lower cost of living

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4
Q

What is gentrification?

A

Improvement of residential areas by immigrants and residents, with an economic dimension like retailing; reinvestment of capital to inner-city

May occur around brownfields

May lead to social displacement of poor as prices increase

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5
Q

What is counter-urbanization?

A

Movement of population away from larger urban areas to smaller urban areas or just beyond the city

Causes: high prices, congestion, pollution, crime rates, lack of community and services

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6
Q

What is re-urbanization / urban renewal?

A

Development of activities to increase residential population densities with the existing built-up city

Revitalizes urban areas fallen into decay

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7
Q

What is the urban circular system?

A

A sustainable city where there is recycling, reuse / reduction of resources, renewable energy, measures to reduce ecological footprint

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8
Q

What is the urban ecological footprint?

A

Amount of land required to sustain population and resources and assimilate waste

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9
Q

How are urban places characterized?

A

Population size
Specific features, such as CBD or residential zones
Predominant economic activities
An administrative function

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10
Q

What is a site?

A

Site: land on which a settlement is built
Situation: settlement’s relationship with surrounding area

Desirable factors: water and timber availability, sunny south-facing slopes, potential for trade

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11
Q

Describe types of urban land use

A

Most places have an industrial or service role
Land use has changed pre / post industrialization (Caribbean fishing town → tourism)

Types: residential, industrial, services, open space, recreation, transport

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12
Q

Describe case study: land use in New York

A

4% commercial: midtown / downtown Manhattan, most jobs
4% industrial
Residential: most land is low-density; med- to high- is 2/3 of housing but 12%
7% public facilities
25% of open space is parks etc
8% vacant

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13
Q

What terms are used to describe the hierarchy of settlements?

A

Range: max distance people travel for good / service
Threshold: min # people for good / service to stay in business
Low-order goods: necessity or convenience bought frequently
High-order goods: luxury bought or used infrequently
Sphere of influence: area served by settlement

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14
Q

Describe the hierarchy of settlements

A

Individual household
Hamlet: low-order services
Village / town: low- and high-order services
City / millionare city (> 1 mil) etc: max # services

Sliding continuum of population / #of services

Each one has more sphere of influence

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15
Q

What are megacities and how do they develop?

A

> 10 million people
Result of: economic growth, rural-urban migration → many young adults for work → high birth
Swallow nearby towns and rural areas; multi-nuclei

Many in developing regions → new planning; env impacts; generate wealth

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16
Q

What are five functions of urban areas in the process of development?

A

Commercial: market, centers to convert to cash crops

Industrial: provides stimulus for development

Political: nationalist feeling

Administrative: economies for health and education

Social: intermixing weakens ties to traditions

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17
Q

What are nine problems cities cause?

A

High unemployment
Insufficient housing
Overloaded transportation systems
Air, water, noise pollution
Deteriorating infrastructure
Growing access inequalities between areas
Inadequate sanitation
Increasing social problems (crime, suicide, drug / alcohol abuse, family breakdown)
Deterioration of perceived quality of life

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18
Q

What factors effect the growth of urban settlements?

A

Areas favoring food production, trade routes, transportation

Attempts to reduce importance of some cities (gongju-yongi planned new capital of South Korea bc Seoul is overcrowded and attack target)

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19
Q

What is bid rent?

A

Land in center is most expensive bc is / was most accessible, limited amount
Price generally decreases further out, peaks around major intersections

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20
Q

What is the heirachy of traditional retail land use?

A

Low-order goods concentrated in neighborhood stores and shopping parades

High-order goods in high streets, department stores, central shopping areas

Out-of-town superstores and retail parks

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21
Q

What factors have caused a retail transition toward supercenters?

A

Demographic change: falling pop growth

Suburbanization and counter-urbanization of affluent households

Technology change: more people own deep-freezers

Economic change: increased standards of living, car ownership

Congestion and price in city centers

Increased accessibility

Social change: more women in paid work

Closure on high-streets → govt policy to return to central / neighborhood → inner-city redevelopment

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22
Q

What are ten characteristics of the central business district (CBD)?

A

Multi-story development
Concentration of retailing
Concentration of public transit
Concentration of offices
Vertical zoning
Functional segregation (pie-slice diagram), internal zoning
Few people live there
High pedestrian flows
Greatest traffic restriction
Changes over time

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23
Q

Where and why is industrial activity in cities?

A

Locations in city:
Inner-city near rail or canal
Near airport
Away from residents

Types of industries:
Skilled labor
Access to CBD (fashion)
Needing urban market (news)

Large cities bc:
Big manufacturing and market
Innovation
Available labor

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24
Q

How do physical factors effect the location of urban residential areas?

A

Wealthy near river bc views and recreation, or poor bc flooding
Same with high/low ground

In rich countries, building standards tend to make up for risks

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25
How do land values effect the location of urban residential areas?
In most HIC cities high-dense residential is inner-city (usually low bc price) Density decreases with space in suburbs Often poor folks in inner-city bc employment → stuff around is expensive
26
How does ethnicity effect the location of urban residential areas?
Positive segregation: group gains together bc they support services Negative segregation: groups excluded (redlining)
27
How does urban residential planning effect the location of urban residential areas?
Plans for social mix via a variety of mixed housing "Edge cities" often gated by wealthy → mix doesn't occur
28
Describe case study: cities in Latin America
Development patten different from the rest of the world CBD around colonial core, commercial extension → "spine" of area with parks, upper-middle Outside are recent suburbs with fewer services Better-accessible older shanty housing compared to new
29
How is urban deprivation measured?
Physical indicators: quality of housing, pollution, crime Social indicators: health levels/access to care, education standards Economic indices: access to employment, income levels Political indices: opportunity to vote, partake in community organization
30
What is a slum household?
Typically on land not wanted by planners 1+ individuals living under the same root in urban area, lacking 1 or more: Durable housing Sufficient living space Access to improved water Access to improved sanitation facilities Secure tenure
31
What are the positives and negatives of living in a slum?
Positive: Points of assimilation Informal employment without commute Strong sense of kinship Low crime rates Negative: Lacks security of tenure No basic services Overcrowding Hazardous sites Poor levels of hygiene and sanitation
32
What is the dual economy of the developing world?
Formal economy, often foreign-owned and for elite Informal economy, local, labor-intensive → bazaar economy and street economy Can work in both sectors
33
Describe characteristics from the informal and formal sectors
Informal easy to enter Informal indigenous inputs, formal foreign Informal family property, formal corporate Informal adapted tech, formal imported Informal unregulated/competitive market, formal protected
34
What is urbanization?
Increase in proportion of people living in urban areas Causes: rural-to-urban migration, urban sprawl S-curve tails at 80% → many HICs have falling urban population
35
What is natural increase?
Birth rate > death rate Often in cities bc youthful structure
36
What is rural-urban migration?
People think they'll be better off in urban areas → move to cities Push factors: negs that cause movement away Pull factors: attractions in another place
37
What is urban sprawl?
Uncontrolled growth of urban areas Limited by green belts
38
Describe case study: gentrification and relocation in Cape Town, South Africa
Gentrification of Woodstock in Cape Town Became seaside suburb in 1850s bc rail line, population grew Stayed integrated during apartheid → POC moved in during 1970s and 80s Urban renewal started in 90s, more young professionals and shops, businesses, etc
39
Describe case study: a changing urban environment: Shanghai
Shanghai is very large; hub for information and most industries 11 themed satellite towns as growth points Air and water transport, but mainly extensive metro lines and buses Targets: public transport between any 2 parts of city center is 1 bus, < 60 min High levels of water stress from demand, saltwater, pollution of agriculture and lack of treatment Most waste is piled outside the city → use of incineration to destroy toxins and for energy Strong base in telecommunications
40
What is deindustrialization?
Long-term decline in manufacturing employment Declining since 1950s Causes: Decline or increasing cost of materials Automation Increased competition Falling demand
41
What are the two types of deindustrialization?
Positive: industries reduce workforce to increase productivity via automation → more competitive Negative: industries decline without productivity compensation
42
Describe case study: urban deindustrialization: decline in Detroit
Was a large city bc car industries, now a lot of vacancy and fallen prices Causes: falling car sales → less revenue, shrinking population, aging population → social costs Lots of unemployment, illiteracy, crime Attempts at revival in farms and art scene from low costs
43
What factors effect the climate of an urban area?
Structure of air above area: more dust → more noxious fumes from industry Structure of urban surface: heat-retaining materials, aspect, exposure
44
What are the resultant processes of urban microclimates?
Radiation and sunshine: Scattering short-wave, absorb long-wave; depends on screening by buildings Haze from industry Clouds and fog: Higher incidence of cloud cover in summer bc convection, radiation fog in winter Day temps .6°c warmer Temperatures: Heat energy retention / release → heat islands 1.5°c warmer on winter nights Big local contrasts between sun and shade Pressure and winds: Severe turbulence around tall buildings, calm small streets Humidity: Decreases bc lack of moisture and high temps Precipitation: More intense storms bc less stability Less snowfall
45
Describe case study: Cheong Gye Cheon, Seoul, South Korea–the impact of river restoration on on urban microclimate
Stream area under highway, temp ~5° higher than city Restoration has decreased temp, increased wind speed, no highway
46
Describe case study: Air pollution in Delhi
Air pollution from diesel exhaust, construction dust, industrial emissions, household cooking and heating Also a problem for smaller Indian cities Rules rarely enforced
47
What are some air pollution management strategies?
Burn less fossil fuels and use energy-efficient technology Use public transit or carpool Bike or walk Use catalytic converters Increase enforcement of emissions standards
48
Describe case study: managing air pollution in Mexico City
Altitude causes lower pressure → higher combustion emissions Pollutant smog blankets city from sun Very expensive Using more green roofs Programs against air pollution: Reduce use of private vehicles Enforce engine maintenance standards Improve fuel quality Make catalytic converters compulsory
49
What is the pattern of traffic congestion?
Transport performance index (TPI) 0-10 Peak congestion weekday morning and evening Weekend is less severe but prolonged Worse at beginning of school year, around holidays, etc
50
What is the impact of traffic congestion on noise pollution?
Related to traffic volume, composition, speed, weather, road surface, barriers Exposure to roads may cause people to exceed the recommended average noise levels
51
Describe slum clearance in Rio
2016 olympics → property boom in central favelas, more outsiders Displaced 170,000 people
52
Describe contested land in Dharavi, Mumbai
Slum area home to thousands of micro-industries → means to escape poverty Contested bc developers want to turn it into a business area, displacing 1 mil
53
Where is urban crime most common?
Concentrated in most urbanized / industrialized areas, poorest working-class Higher rates in deprived areas and where there are more commuters than residents
54
What factors influence the development of a crime hotspot?
Typical attributes: young, single, minority, male, broken home, low-income and skill, unemployed, poor housing Location: Crime targets Easy access Residential land use Lack of health centers, schools, rec areas, police stations
55
Describe case study: urban crime in Zanjan, Iran and Kaduna, Nigeria
Islamabad: dense informal settlement in Zanjan, few facilities Violence, drug abuse and trafficking Higher rates of burglary and stealing in dense, poor-quality Badarawa-Malali district of Kaduna than high-income areas with higher car theft
56
Describe case study: urban deprivation and regeneration in Barcelona
Two areas of deprivation: inner-city El Ravel and edge migrant housing Deindustrialized in 70s and 80s → high unemployment Overcome via economic transformation: entreprenurial and political leadership, public-private partnership, diversification of economy especially for World Cup Continues to regenerate
57
How can urban crime be managed?
More police officers Greater use of security cameras Improved street lighting More available and women-only taxis when bars close
58
What are the trends in urban growth projections?
% of pop in urban areas is increasing, highest in North America All cities are growing, megacities and large cities fastest
59
Describe characteristics of resilient cities
Economically productive, socially inclusive, environmentally friendly Functioning transportation, energy, waste, water systems High population → more vulnerable but less emissions and ops for infrastructure
60
How do cities manage hazard risk?
2000 - NYC water supply contamination → financial incentive to industrialists / farmers Smog → change to clean energy Seismic events → zoning and building codes Storm / flood risk → levees and sea walls; more infrastructure up Greanspace, sustainability plans
61
Describe case study: protecting Lagos: Eko Atlantic
Lagos: coastal metacity, at risk of erosion, 2/3 people in slums Sea wall designed to stop erosion Eko Atlantic: eco-city planned behind sea wall, would benefit wealthy Govt should improve lives of people; project could increase erosion
62
How can cities become sustainable?
Compaction: less space / stuff / sprawl, better transit Use renewables Conserve / reduce fossil fuels Treat waste locally Sufficient green spaces Reuse / reclaim land Active community involvement
63
What is the Beddington zero energy development (BedZED)?
99 env-friendly homes in south London, 2000-2002 Solar panels, insulation, renewable / recycled materials from nearby, close to transit Lower average space-heating requirements, hot water, water main, power, car mileage Expensive to build
64
Describe case study: Mazdar City
$22 bil planned eco-city for 2030 in UAE All solar-powered, no cars, circulation via infrastructure Supported by US govt, Greenpeace who said more emphasis on existing things
65
What is the urban ecological footprint?
Land area to provide people's resources: food, water, electricity, waste assimilation Based on population's consumption
66
Describe case study: Tokyo's ecological footprint
High density → more land availability compared to spread areas Less needed infrastructure, resources
67
Describe case study: environmental measures in Chicago
City Hall roof garden → cooler in summer, less sewer water, reduces heat island CCAP 2008 → reduced C02 → hybrid buses, light colored repaving when needed
68
What is C40?
83 megacities addressing climate change Goals: Improving public / personal transport Efficient outdoor lighting Reliable and efficient infrastructure and water Retrofit offices/homes to be efficient
69
What are some examples of non-car traffic management?
Cable-car system linking El Alto and La Paz, Bolivia; 85-90% use public transit Bogotá, Colombia bus system specifically accessible for low-income communities Helsinki and Hamburg becoming car free, greenspace and transit / people power Venice and The Medina of Fez el Bali (Fez, Morocco) are car-free
70
What is a "smart city"?
Investments in social and human capital, physical infrastructure, info / comm / tech → sustainability and high quality of life Performs well in: economy, env, people, living conditions, governance, mobility
71
Describe case study: Songdo International Business District, South Korea
2005 started brand-new smart city; LEED certified, sensors and tech, zoned to become international business hub Songdo has greenspace, ways to reduce emissions / resources, etc Cheongna (finance) and Yeongjong (logistics) also in free economic zone