1 / 27

How We U se L and

How We U se L and. Ch. 14. Section 1 Objectives. Distinguish between urban and rural land. Describe three major ways in which humans use land. Explain the concept of ecosystem services. Urban land - land that is covered mainly with buildings and roads. Must have At least 2,500 people

ciara-crosby
Télécharger la présentation

How We U se L and

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. How We Use Land Ch. 14

  2. Section 1 Objectives • Distinguishbetween urban and rural land. • Describethree major ways in which humans use land. • Explainthe concept of ecosystem services.

  3. Urban land- land that is covered mainly with buildings and roads • Must have • At least 2,500 people • A governing body – city council etc.

  4. Rural land- land that contains few people with large open spaces • Any area not classified at urban • Provides many resources for humans • Wood • Crops • Minerals • Livestock land • recreation

  5. Where we live • Up until about 1850 most people lived in – Rural areas • The Industrial Revolution changed this • Machinery • Better transportation • Elimination of rural jobs • People moved to the city to find jobs

  6. Urban Life • We are still very dependant on rural areas for • Clean drinking water • Fertile soil and land for crops • Trees for wood and paper • Oxygen produced by vegetation • Ecosystem Services – resources that are produced by natural and artificial ecosystems

  7. Ecosystem Services • Developed Countries – need 8 hectares (19.7 acres) of land for their ecosystem services per person • US – need 12 hectares of land (29.6 acres) • Germany – need 6 hectares (14.8 acres) • Developing Nations – use less than 1 hectare (2.5 acrea) per person

  8. http://www.umac.org/ocp/videos/ecosystemServices.html • https://www.youtube.com/watch?v=mLVkf67mghw

  9. Ecosystem Service examples • Pg. 383 • Clean water – purified by rivers • Clean air – purified by plants • Oxygen from plants • Lumber from trees • Fertile soil from decomposing plants • Flood prevention from plant roots • Climate regulation from oceans and atmosphere • Decomposition of waste • Beauty

  10. Section 2 Objectives • Describethe urban crisis, and explain what people are doing to deal with it. • Explainhow urban sprawl affects the environment. • Explainhow open spaces provide urban areas with environmental benefits. • Explainthe heat-island effect. • Describehow people use the geographic information system as a tool for land-use planning.

  11. Urbanization- the movement of people from rural areas to cities • 1960 – 70% of people lived in cities • 1980 – 75% of people lived in cities • Urban growth has slowed

  12. Pre-car Vs. Post-car cities • Cities built before the invention of the car • cover a small area • Traffic problems • Not much open space • Cities built after the invention of the car • Cover large areas • Better traffic flow • Better city planning • More “green” spaces

  13. New York Vs. L.A. L.A. Population = 3.8 million Area = 498 square miles New York Population = 8.3 million Area = 305 square miles

  14. Green Space • Provide ecosystem services for large cities • Temperature moderation • Reduction of rainwater runoff • Aesthetic value

  15. Rapid population growth • Trafic jams • Substandard housing • Air pollution • Water pollution • Can overwhelm the infrastructin • Roads • Sewers • Fire and police stations • Schools • Hospitals • Etc.

  16. Urban Sprawl- rapid expansion of a city into the country • Creates suburbs • Most suburbs are built on land previously used for food production

  17. Marginal Land- land that is not good to build on • L.A. and Mexcico City were buildin basins and have expanded into the mountain side around them

  18. Heat Island- the increased temperature in a city • Can effect local weather patterns Atlanta, GA Tornado

  19. https://www.youtube.com/watch?v=t-sXHl3l-rM

  20. Land-use Planning- determining in advance how land will be used • Where are houses, building, factories, etc. going to be built. • This helps deal with overpopulation later • Use Geographic Information Systems (GIS) to simulate where things are going to be built

  21. Section 3 Objectives • Explainthe benefits of preserving farmland. • Describetwo ways that rangeland can be managed sustainably. • Describethe environmental effects of deforestation. • Explainthe function of parks and of wilderness areas.

  22. Farmlands- land that is used to grow food and crops • Threatened by urban sprawl

  23. Rangelands- open land not used for farming • Usually used for grazing livestock • Can be arid (dry) or wet (swamps) • Often overgrazed

  24. Forest Lands • Valued for the wood it produces. • Clear-cutting – removal of all trees in an area • Less expensive • More harmful • Selective cutting – removal of only the mature or middle-aged trees • More expensive • Less harmful

  25. Deforestation- clearing a forest without replanting • Reduced wildlife • Created erosion of topsoil

  26. Reforestation- replanting trees where deforestation has occured • Can be natural or man made

  27. Parks and Preserves • The US Wilderness Act of 1964 • Designated certain lands as wilderness areas • Wilderness – an area of land that is protected from exploitation

More Related