Processes of urban growth
🌍 Urban Growth: Processes of Urban Growth
What is Urban Growth?
Urban growth is the way cities expand over time. Think of it like a growing tree: the roots (people, businesses, services) spread out, the trunk (main roads, utilities) gets thicker, and new branches (neighbourhoods, parks) sprout. 📈
Key Processes of Urban Growth
- Population Growth – More people move in, like adding more leaves to the tree.
- Economic Development – Jobs and businesses attract people, similar to a tree gaining nutrients.
- Infrastructure Expansion – Roads, public transport, and utilities spread out, acting as the tree’s branches.
- Land Use Change – Farmland or forests are converted to housing or industry, like a tree shedding old leaves.
- Policy & Planning – Government decisions shape where and how the city grows, like a gardener trimming a tree.
Growth Rate Formula (Math)
The annual growth rate of a city’s population can be calculated with:
$r = \frac{\Delta P}{P_0} \times 100\%$
Where $\Delta P$ is the change in population and $P_0$ is the initial population.
Urban Growth Models (Examples)
| Model | Key Features | Example City |
|---|---|---|
| Concentric Zone Model | City centre → working class → middle class → suburbs | London (historical) |
| Sector Model | Growth spreads in wedges along transport routes | Chicago |
| Multiple Nuclei Model | Several centres of activity (industrial, commercial, residential) | Los Angeles |
Exam Tips 📚
- Remember the key processes – list them clearly in your answer.
- Use examples to support each process (e.g., London for Concentric Zone).
- Show understanding of growth rate – write the formula and explain each variable.
- Include visuals – draw a simple diagram or table if allowed.
- Keep your answer structured – use headings, bullet points, and short paragraphs.
Revision
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