Irrigation & Agriculture IB Geography Freshwater

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Examine the environmental impact of agriculture and irrigation on water quality.
Salinization,
agro chemical runoff,
pollution of ground water,
eutrophication of rivers, lakes and wetlands.

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Irrigation & Agriculture IB Geography Freshwater

  1. 1. IB Geogaphy – Freshwater Irrigation and Agriculture (3hrs) Objective: Examine the environmental impact of agriculture and irrigation on water quality.
  2. 2. Impact 1 - Salinization
  3. 3. Salinization • http://soils.usda.gov/sqi/publications/files/salinzation.pdf • Task 1 – Open the hyperlink and read the information on Salinization. Summarise how the process happens and how it is linked to irrigation and agriculture. Briefly explain how its effects can be combatted. • http://www.dawn.com/2002/10/14/ebr10.htm This link explains the problems caused by Salinization in the Indus Valley, Pakistan. Read over the document put pay particular attention to the fifth paragraph onwards. • Create two spider diagrams that show 1. The causes fo Salinization in the Indus Valley and 2. The effects ….. • PPM = Parts per million
  4. 4. Impact 2 - Agro-Chemical Runoff • Watch the video on the following slide. • Make notes under the following headings: • Case study location • How much pesticide is used every year? • What is a pesticide? • Links to agriculture and runoff. • Effects on the environment. • Protection measures.
  5. 5. Agro Chemical Runoff
  6. 6. Impact 3 - Groundwater Contamination • Watch the video on the next slide and read the information on the web link here • http://www.waterencyclopedia.com/Oc- Po/Pollution-of-Groundwater.html • Summarise all the ways that groundwater pollution can occur by agriculture and irrigation and associated management strategies.
  7. 7. Groundwater Contamination
  8. 8. Impact 4 - Eutrophication of rivers, lakes and wetlands. • Turn to page 494 of Integrated Approach • Copy Figure 16.50 under the heading at the top of this slide. • http://www.guardian.co.uk/science/2003/aug/11/ sciencenews.theguardianlifesupplement1 • Read the newspaper article and summarise the main causes of eutrophication of our freshwater resources. • Use your internet skills to find and print out a case study of eutrophication of a freshwater resource. If you are struggling, use this resource • http://www.unesco.org/water/wwap/case_studies/peipsi_lake/index.shtml?utm_source=twitterfeed &utm_medium=twitter
  9. 9. Exam technique • Prepare an essay plan (do not write an essay!) on the following IB question: • Using multiple case studies, discuss the extent to which agriculture and irrigation impact upon the quality of water supplies around the world? (20)

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