Lesson 4.3: Urban Land Use and Models of the City

Introduction

Welcome to Lesson 4.3 of Foundation Human Geography! In this lesson, we will dive into the world of urban land use and explore the various models that describe how cities are structured. As the world steadily shifts toward urban living, understanding how cities work is crucial. By the end of this lesson, you will:

Understand the internal structure of cities, including the central business district, inner city, suburbs, and urban fringe.
Learn about classic urban models like the Burgess concentric-zone model, Hoyt sector model, and Harris-Ullman multiple-nuclei model.
Explore bid-rent theory and its implications for land value and location.
Analyze why models designed for cities in the Global North often fail to explain cities in the Global South accurately.
Discuss land-use models specifically for cities in the Global South.

The Internal Structure of Cities

Cities can be complex and multifaceted environments. They generally consist of distinct zones that serve different purposes. Let’s break down the main components of urban structure:

1. Central Business District (CBD)

The Central Business District is the heart of a city. It is typically characterized by:

High land values due to demand for commercial space 🏙️
Tall buildings that house offices, banks, government buildings, and retail shops
High foot traffic and public transportation access

For example, think of a famous CBD like Wall Street in New York City, where the financial industry thrives and attracts people from all over.

2. Inner City

The inner city surrounds the CBD and is often densely populated. Characteristics include:

A mix of residential housing (often older and less expensive) and commercial developments
Higher levels of socio-economic challenges, including poverty and limited public services

For instance, neighborhoods like Harlem in New York City have a rich cultural history but also face challenges typical of inner city areas.

3. Suburbs

Suburbs are the areas surrounding the inner city, typically characterized by:

Lower population density with more residential housing like single-family homes 🏡
Increased green spaces, schools, and shopping centers

Suburbs like those around Los Angeles offer a more tranquil lifestyle compared to the bustling inner city life.

4. Urban Fringe

The urban fringe marks the transition area from urban to rural. Key features include:

Large amounts of undeveloped land and new housing developments
Shopping malls and recreational areas that serve both city dwellers and those in nearby rural areas

This is where cities expand, and many people find affordable housing as they move away from the inner city.

Classic Urban Models

Understanding urban models allows us to analyze and predict urban growth and development patterns. Here are three classic models:

1. Burgess Concentric-Zone Model

Developed in the 1920s by sociologist Ernest Burgess, this model suggests that cities grow in concentric circles:

Zone I: CBD
Zone II: Zone of Transition (industrial area, often poor housing)
Zone III: Zone of Working-Class Homes
Zone IV: Zone of Middle-Class Homes
Zone V: Commuter Zone

For example, a city exhibiting this model would have its wealthiest residents living farthest from the CBD.

2. Hoyt Sector Model

Hoyt’s model, proposed by Homer Hoyt in 1939, suggests that cities develop in wedges or sectors radiating out from the CBD. Each sector can contain:

Different land uses, such as residential, industrial, or commercial
Social classes arranged in sectors based on transportation routes

This model emphasizes that cities grow along transportation networks, leading to distinct patterns of land use.

3. Harris-Ullman Multiple-Nuclei Model

Presented by Chauncy Harris and Edward Ullman in 1945, this model argues that cities develop with multiple centers or "nuclei." Each nucleus allows:

Certain activities to cluster due to specific economic needs and social practices
Diverse functions, including industrial, commercial, and residential zones to coexist

For instance, a city may evolve with different commercial centers like shopping malls and business districts, each serving various communities.

Bid-Rent Theory

Bid-rent theory explains how land value varies with proximity to the CBD. As distance from the center increases:

Land prices decrease as demand drops
Businesses willing to pay higher prices for land near the CBD (high-value land) relocate to be close to customers and resources

This can be expressed mathematically as:

$$ P = f(D) $$

where $P$ is the land price and $D$ is the distance from the CBD.

Consequently, different groups (e.g., high-income households, businesses) will choose their locations based on land cost and accessibility.

Urban Models in the Global South

While the above models work well for cities in the Global North, they often don't apply effectively to cities in the Global South. Reasons include:

Rapid urbanization and informal settlements, which don't fit in a neat model
Economic and social disparities that create distinct urban landscapes
Unique cultural and historical contexts that influence urban form

For example, cities like Mumbai and Nairobi have sprawling informal settlements with unique patterns of land use that differ vastly from traditional urban models.

Land-Use Models for Cities in the Global South

Understanding urban development in the Global South requires different models:

Dual Economy Model: This model illustrates the contrast between formal (organized) and informal (unregulated) economies within a city.
Informal Settlement Model: Focuses on how unplanned and informal housing has transformed landscapes, providing affordable shelter to many urban dwellers.

By studying these models, we can better comprehend the complex dynamics of urban areas in the Global South.

Conclusion

Urbanisation presents a profound transformation in the way we live and interact. Understanding the internal structure of cities and the models that describe urban land use helps us grasp the nuances of urban challenges. The classic models provide a starting point, but we must also consider the unique realities of urban areas in the Global South to adopt a holistic view of urban geography.

Study Notes

The internal structure of cities includes the CBD, inner city, suburbs, and urban fringe.
Classic urban models: Burgess concentric-zone, Hoyt sector, and Harris-Ullman multiple-nuclei models explain city organization.
Bid-rent theory shows how land value decreases with distance from the CBD.
Urban models from the Global North often do not fit cities in the Global South.
Alternative land-use models are needed to understand urban realities in the Global South.