Chapter 9
The Urban
World
2 Men and a ?
Why are people moving to urban areas?
Urban Migration
1800 – 3% Urban
1900 – 14% Urban / 12 cities with 1million people
1950 – 30% Urban / 83 cities with 1million people
2007 – 50% Urban / 400 cities & 19 with over 10million
2050 – 70% Urban
Urban = in U.S. any place with more than 2,500 people
History of Urban
Revolutions
First Urban Revolution - 8000 to 2000 BC
Population and Urbanization
Urbanization Trends in US
What is a
Megalopolis?
Urbanization Pros & Cons?
1. Age Structure
2. Greater Number of Men
3. Poverty & Homeless People
4. Crime Rates
5. Pollution
6. Transportation
7. Infrastructure
8. Immigrants
P.O.E.T
Elements of an Ecosystem
Population
Organization
Environment
Technology
=
The Ecology of a City
Urban Problems
1.
2.
3.
4.
5.
6.
Land Use Patterns - sprawl or type of development
Traditional Land Loss
Flooding - location
Brownfields - industrial waste
Home Waste - disposal
Sewage Treatment - 2/3 untreated in developing nations
cities
7. Commute Times
8. Urban Heat Islands
9. Pollution - water (sewage), air (ground ozone & Energy
Production), noise (traffic & agriculture)
1. Land Use - Georgia
1. Zoning
2. Land Use- Agricultural Loss
3. Flooding
3. Flooding
4. Brownfields
Atlanta also has over 950 Brownfield sites within its
boundaries.
Atlantic Station was built on the site of the old
Atlantic Steel Mill. From 1901 through 1997, the
Atlantic Steel Mill operated, employing as many as
2000 people. Today, Atlantic Station is known as the
largest urban brown field redevelopment in the
nation.
5. Sewage in Atlanta
A 19-square mile area of Atlanta, with
Downtown as its center, is served by a
combined sewer system.
In a combined system, a single large sewer
pipe carries both sewage and stormwater to a
water reclamation center for treatment.
Neighbors and available land for solid waste?
7. Commute
Times
8. Atlanta’s Heat Island & Sprawl
Impacts:
Hotter = greater energy consumption
Runoff = increased
9. Pollution
Every unit has something on this topic