Urbanization: Origin, Growth, and Influencing Factors

15.1 THE ORIGIN AND INFLUENCES OF URBANIZATION

• Urbanization is the process that transforms rural areas into densely populated urban regions.
    - Economic opportunities attract individuals to urban areas.
    - Cities serve as central hubs for political, economic, cultural, and educational activities.
    - Cities are often cosmopolitan, incorporating diverse ethnicities and cultures.

THE GROWTH OF CITIES

LEARNING OBJECTIVE

• PSO-6.A Explain the processes that initiate and drive urbanization and suburbanization.

• Historically, a significant majority of the global population lived in rural settings.
    - The Neolithic Period (~10,000 B.C.E.) saw advances in agriculture allowing for permanent settlements that evolved into cities.
    - Early urban centers emerged for trade, defense, and religious purposes.
    - Example: Uruk, approximate founding around 4500 B.C.E., utilized its favorable positioning along the Euphrates River, facilitating trade and becoming a prominent city in ancient Mesopotamia.

• Urbanization emerged rapidly during the Industrial Revolution, leading to the exponential growth of cities as jobs in factories attracted people.
    - According to the United Nations, 55% of the world’s population lived in urban areas as of recent statistics. It is projected that by 2050, this will rise to 68%.
    - Urban populations surged from 751 million in 1950 to 4.2 billion in 2018, with estimates suggesting urban populations could reach 85% based on satellite data.

• An urban area consists of both a city and its surrounding suburbs.
    - The U.S. Census Bureau defines urban areas as "densely developed territory," distinguishing between:
      1. Urbanized Area: Population of 50,000 or more.
      2. Urban Cluster: Population between 2,500 and 49,999.
    - Alternative definitions exist globally, e.g., European Commission states 85% of countries identify urban areas as having populations of 5,000+.

• Rural areas generally feature low population density and minimal development with agriculture as the primary industry.

• Cities provide various essential services including political, medical, educational, and infrastructural support.
    - The influence of cities extends beyond their geographic boundaries (e.g., Greater New York City, Los Angeles metropolitan area), defining the concept of metropolitan areas.

GEOGRAPHIC THINKING

1. Challenges of comparing city sizes globally: Differences in definitions of urban areas can lead to varying population counts, types of data sources, and data collection methods.

2. Comparison of metropolitan areas to cities: Metropolitan areas encompass a city and its economically and culturally connected surroundings, while city refers to a specific, singular urban locale.

SITE AND SITUATION

LEARNING OBJECTIVE

• PSO-6.A Explain the processes that initiate and drive urbanization and suburbanization.

• The growth and function of cities are influenced by their site (physical location and features) and situation (relationships to other locations).
    - Site Factors: Include physical attributes like landforms, climate, water availability, soil quality, and natural resources.
    - Situation: Refers to how a city connects to other places, which can enhance trade and economic development.

SITE

• Certain locations within landscapes are more favorable for settlements.
    - Preferences for flat terrains generally exist for construction, although elevated terrain is favored for safety against attacks.
    - Historical example: Athens was built on hills in ancient Greece for strategic advantages against attackers.
    - Access to critical natural resources (e.g., iron, coal, fresh water for industries) is key; e.g., San Francisco grew rapidly following gold discoveries in the 1800s.
    - Proximity to transportation routes is another critical factor. Historically, islands and harbors have been preferable for settlements due to accessibility and defensibility.
      - Examples include cities like New York, Rio de Janeiro, and Sydney, which are situated on natural harbors.
      - Other examples include cities along tidal rivers or where river junctions occur, like Quebec City and Lévis on the St. Lawrence River.

• Trade routes have historically dictated urban growth patterns. Cities thrived at river confluences or along significant trade networks.
    - The Erie Canal revolutionized travel and trade in the U.S., emphasizing the importance of transportation in urban development.
    - Technological advancements alter site significance, as seen during the Industrial Revolution when waterpower along fall lines became crucial for factory settlements.

SITUATION

• A city's situation influences its evolution and functions.
    - Locations positioned on vital trade routes tend to have boosted longevity and economic growth, e.g., Aleppo due to its connection to the Silk Road.

• An example of changing advantages: Before the completion of the Erie Canal in 1825, cities such as New Orleans and Philadelphia held more influence than New York City. The canal enabled New York to become a commercial powerhouse by connecting to the Midwest.

• The specific site of Tenochtitlán (historical capital of the Aztec civilization) shows the geometric advantage provided by its location on a safe island, which was strategically advantageous and beneficial for logistics and commerce.
    - Surviving Aztec structures, including Templo Mayor, illustrate the significance of site choice and connection, causing Mexico City to flourish around the historic site.

GEOGRAPHIC THINKING

3. Comparison of site and situation: Site relates to immediate factors like geography and resources, while situation involves broader contextual relationships that contribute to the city's relevance.

4. Role of site and situation in Tenochtitlán's location: The marshy island site allowed for effective defenses and waterway transportation, enhanced by the city's strategic placement in an urban trade network.

15.2 FACTORS THAT INFLUENCE URBAN GROWTH

• Cities are dynamic and evolve with changes over time, influenced by transportation, communication networks, demographic trends, economic shifts, and governance.

TRANSPORTATION AND COMMUNICATION NETWORKS

LEARNING OBJECTIVE

• PSO-6.A Explain the processes that initiate and drive urbanization and suburbanization.

• Transportation infrastructure is a fundamental factor for urban development.
    - Networks such as waterways, railroads, and highways enable movement of materials, goods, and workers through urban areas.
    - Technological improvements in transportation can lead to suburban growth as businesses relocate due to access to residential areas ensuring labor supply.
  

• Historical patterns often saw the first U.S. cities grow along the Atlantic Coast or rivers for ease of trade. Cities like Boston, New York, and Savannah exemplify early urban trends due to their access.
    - Philadelphia capitalized on its strategic situational advantage at the Schuylkill River mouth, fueling its growth from trade.

• Chicago's evolution serves as an example of advantageous situational dynamics. Initially unremarkable, it flourished after the Erie Canal's establishment and continued to thrive as a transportation hub through railroads.
    - The growth trajectory increased city population and capacity for distribution.

• Advancements in communication, notably the telegraph and telephone, have historically reshaped urban development.
    - Enhanced efficiency leads to increased production needs, spurring population growth.
    - Modern technologies (internet, telecommunications) have similarly facilitated urbanization by enabling businesses to communicate and operate efficiently across distances.

POPULATION GROWTH AND MIGRATION

LEARNING OBJECTIVE

• PSO-6.A Explain the processes that initiate and drive urbanization and suburbanization.

• Rural-to-urban migration forms a central component in urbanization dynamics fueled by push (e.g., agricultural challenges) and pull factors (e.g., employment opportunities).
    - Historical migration accelerated during the Industrial Revolution, impacting mainly peripheral and semi-peripheral nations today.
    - U.S. examples such as Kansas City highlight the catalytic role of railroads in population shifts.

• The growth of areas such as Silicon Valley demonstrates patterns of technological migration. The economic shifts from manufacturing to R&D have additionally contributed to non-affordable living spaces contrasted by rapid population growth (e.g., San Jose).

• Global examples include Shenzhen, where rapid economic liberalization prompted immense urban migration from rural areas.

ECONOMIC DEVELOPMENT AND GOVERNMENT POLICIES

LEARNING OBJECTIVE

• PSO-6.A Explain the processes that initiate and drive urbanization and suburbanization.

• Cities fulfill a multitude of economic roles depending on their unique histories and situational contexts.
    - Larger, influential cities often serve as diversified business and government hubs, while others serve specific roles aligned with their situational context.
    - Example cities range from governmental Philadelphia to industrial centers like Detroit, which underwent considerable decline with manufacturing shifts.

• Economic functions can evolve over time, as seen in Bruges transforming from a manufacturing center to a tourism hotspot.

• Policies stimulate urbanization. City governments may compete by offering financial incentives to attract businesses or may enact zoning laws to manage land use effectively.
    - Providing public safety and investing in livable conditions, such as education and housing, further bolster urban appeal.

SUBURBANIZATION, SPRAWL, AND DECENTRALIZATION

LEARNING OBJECTIVE

• PSO-6.A Explain the processes that initiate and drive urbanization and suburbanization.

• In the U.S., urban transportation evolution led to the extensive growth of suburbs as people moved beyond city centers.
    - Development of streetcars and later, highways, provided residents opportunities to live further away from work.
   

• Urban sprawl presents challenges characterized by chaotic growth patterns leading to environmental impacts and socioeconomic disparities within metropolitan areas.
    - New land use forms have emerged, exemplified by edge cities and boomburbs, which blend urban and suburban characteristics.

• Urban planners are addressing challenges of sprawl by incentivizing revitalization efforts, land infill, and creating mixed-use neighborhoods to renew urban settings.

GEOGRAPHIC THINKING

1. Urban development patterns along rivers in the 19th century highlight their significance for trade and logistics. These cities may face challenges due to evolving transportation needs.

2. Economic development and government policy shapes urban growth by creating attractive conditions for businesses and residents likewise.

3. Automobile-centric evolution has drastically redefined American cities, influencing architecture, commute patterns, and land use distinctly compared to pre-automotive cities.

4. Understanding suburbanization's role in urban sprawl illustrates the interconnected growth dynamics of metropolitan regions.