Unit 5 Ap Human Geography Review

Unit 5 AP Human Geography Review: Mastering Urban Geography

Welcome to your comprehensive review of Unit 5: Urban and Rural Land Use for the AP Human Geography exam. This unit is a cornerstone of the course, moving from broad population patterns to the intricate, lived-in spaces where the majority of the world’s population now resides. Understanding the forces that shape our cities—and the stark contrasts between urban and rural areas—is fundamental to grasping contemporary global challenges, from economic inequality and environmental sustainability to political organization and cultural diffusion. This review will demystify the key models, theories, and processes you need to conquer the exam questions on this dense but fascinating topic. We will break down the historical evolution of urban thought, apply classic models to real cities, and confront the modern realities that challenge these theories.

Detailed Explanation: The Foundation of Urban Geography

Unit 5 is not just about cities; it is about spatial organization. It examines why cities are located where they are (site and situation), how they grow and develop internally (urban models), and what functional and social patterns emerge from that growth (central place theory, rank-size rule, primate city). The unit also critically contrasts the urban experience with the rural, exploring the rural-urban continuum, the agricultural revolution's role in enabling cities, and the persistent urban-rural migration that fuels global urbanization.

At its core, this unit answers a central geographical question: How are human activities distributed across space in urban environments? The answer involves a blend of historical accident, economic logic, political power, and social dynamics. You will learn to see a city not as a random jumble of buildings, but as a spatial outcome of processes like centralization vs. decentralization, gentrification, suburbanization, and urban sprawl. The lens shifts from the global scale of Units 2 and 3 to the intensely local scale of neighborhoods, downtowns, and suburbs, while still connecting these local patterns to global economic systems (e.g., world cities in the global city network).

Concept Breakdown: The Classic Urban Models (A Step-by-Step Evolution)

The heart of Unit 5 is a series of normative models—theoretical "ideal types" of city structure developed primarily in the early-to-mid 20th century based on North American and European cities. Understanding their assumptions and sequential development is key.

1. The Concentric Zone Model (Burgess, 1925): This is the foundational model. Burgess, studying Chicago, proposed that cities grow outward from a central point in a series of rings, each representing a different land use and social group, driven by ecological succession and land rent/ bid-rent theory.

• Zone 1: Central Business District (CBD). The core of commercial, retail, and cultural activity. Highest land values, tallest buildings.
• Zone 2: Zone of Transition. A deteriorating area with mixed uses, older housing, and light industry. Often a first landing point for immigrants and low-income groups. Prone to gentrification.
• Zone 3: Zone of Independent Workers’ Homes. Older, modest housing for factory and blue-collar workers.
• Zone 4: Zone of Better Residences. Middle-class suburbs with newer, larger homes.
• Zone 5: Commuter’s Zone. High-income residential areas on the urban fringe, from which residents commute to the CBD.

2. The Sector Model (Hoyt, 1939): Hoyt argued that cities do not grow in uniform rings but in sectors or wedges radiating from the CBD along transportation routes (railroads, highways). High-rent residential areas develop in specific sectors (often west-facing, upwind of industrial pollution), while low-income areas are confined to other sectors. This model better accounts for the linear nature of transportation corridors.

3. The Multiple Nuclei Model (Harris & Ullman, 1945): This model breaks from the single-center idea entirely. It posits that a city develops around multiple nuclei or centers of activity (e.g., a CBD, a secondary business district, a university, an airport, a industrial park). Different land uses cluster around these nodes based on their specific needs (e.g., heavy industry near rail yards, a shopping mall near a highway intersection). This model reflects the rise of the automobile and the decentralization of economic activity.

4. The Peripheral Model (Griffin-Ford Model) & the Latin American City Model: These models explicitly critique the Euro-American bias of the first three. The Peripheral Model describes cities in the less developed world (LDW) characterized by a dominant CBD, a zone of maturity with some infrastructure, a zone of in situ accretion (older, dense housing), and a massive peripheral squatter settlement (favelas, barrios, shantytowns) lacking basic services. The Latin American City Model adds the elite residential sector extending from the CBD along a spine, with high-status services following it.

5. The Sub-Saharan African City Model: Reflects the colonial legacy and rapid, unplanned growth. Features a CBD (often colonial-era), a neighborhood for Africans, ethnic neighborhoods, a satellite township for Africans during apartheid, and squatter settlements on the periphery. The model emphasizes social fragmentation over economic sectoring.

Real Examples: Applying the Models to the Real World

No city perfectly fits any single model, but they provide powerful analytical lenses.

• Chicago & the Concentric Zone: Early 20th-century Chicago, with its clear ring of the Loop (CBD), the surrounding Near West Side (Zone of Transition), and radiating residential neighborhoods, is the archetype for Burgess. You can still see this

pattern in the radial diversity of its neighborhoods.

• Los Angeles & the Sector Model: LA's development along freeways and its sectoral patterns of wealth (Westside vs. South LA) align closely with Hoyt's vision of growth along transportation corridors.

• Houston & the Multiple Nuclei Model: Houston's sprawling nature, with multiple business districts (Downtown, the Galleria, the Energy Corridor, the Medical Center), exemplifies Harris and Ullman's decentralized city.

• São Paulo & the Latin American City Model: The stark contrast between the wealthy Morumbi district and the massive favelas like Heliópolis perfectly illustrates the Peripheral Model's core-periphery divide.

• Nairobi & the Sub-Saharan African Model: Nairobi's CBD, the historic African neighborhoods of Eastleigh and Highrise, the wealthy suburbs of Karen and Gigiri, and the sprawling Kibera and Mathare slums are a textbook example of the Sub-Saharan African City Model.

Conclusion: The City as a Living Model

Urban models are not static blueprints but dynamic tools for understanding the complex forces that shape our cities. They are simplifications, yes, but they reveal the underlying logic of urban development—whether driven by economic competition, transportation networks, social segregation, or colonial legacies. By studying these models and applying them to real-world examples, we gain a deeper appreciation for the city not just as a collection of buildings, but as a living, evolving organism shaped by the interplay of human ambition, social structure, and the physical landscape. The city, in all its forms, is the ultimate expression of human geography.