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Title: The Significance of Lake Victoria

Recapping the learning from last lesson:

  1. How tall was the Aswan Dam
  2. One disadvantage of the Aswan Dam
  3. One advantage of the Aswan Dam

Recapping the learning from earlier in the course:

  1. Why might agriculture be considered to be the worst threat to the tropical rainforest?
  2. Explain why the poles are colder than the equator?

Challenge Activity

DO NOW: Work on your own to answer these questions in full sentences in your book.

Using the map, describe the location of Lake Victoria?

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Describe Lake Victoria and its location using all the words below.

68,800km2 - Uganda - Kenya - Tanzania - Border

Challenge

From this cropped image of Africa, can you describe where Lake Victoria is in Africa?

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Task: Create a spider diagram with “Uses for Lake Victoria” in the middle, and add as many ways as you can think of how Lake Victoria might be useful.

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Hydroelectricity

Fishing

Tourism

Disposal of Human Waste

Transport

Domestic use, eg water for people’s homes

To irrigate crops

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Economic uses… How will they benefit the countries more widely?

Increased use of Lake Victoria as a transport link

Increased use of the Lake to generate hydroelectricity

Increased use of Lake Victoria to produce fish

TASK: Explain in three paragraphs, how an increase in each of these uses would benefit countries more widely.

Sentence Starter

Countries would benefit from X because...

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Model answer - Transport

Using Lake Victoria as a transport link would increase trade between the countries who border it. This would encourage the growth of different industries and increase the wealth of the countries. Furthermore, this increased wealth could be spent on essential services such as healthcare and education which would further benefit the countries.

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However, what problems are increasing these likely to lead too?

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Why do some Lakes look like this?

Lough Neagh, Northern Ireland

Lake Victoria

Eutrophication

  1. When a water body receives an influx of nutrients from sources like agricultural runoff, sewage, and industrial discharge.
  2. These nutrients stimulate the growth of algae and other aquatic plants, leading to algal blooms.
  3. As the algae and plants die and decompose, they take oxygen out of the water, leading to fish loss.

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The International Union for Conservation of Nature (IUCN), a global body on nature conservation, has come out with a new report in which it warns that 76 per cent of the biodiversity in Africa’s Lake Victoria is at the risk of becoming extinct.

This was due to overfishing and environmental damage as wetlands were being used for industries. This could be a disaster for locals as many of these species are very important culturally, and in small amounts are traded at the local market and important for people's jobs.

The International Union for Conservation of Nature (IUCN), a global body on nature conservation, has come out with a new report in which it warns that 76 per cent of the biodiversity in Africa’s Lake Victoria is at the risk of becoming extinct.

Major threats to the lake’s ecosystem include pollution from agricultural effluent including nutrient loads, herbicides and pesticides, industrial effluent and domestic sewage (including solid waste) and pharmaceuticals from urban areas discharged into the lake. They are affecting 57 per cent of all species and 88.3% of threatened species native to the Basin.

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Overall, where are you on this scale?

Most in favour

Countries should certainly increase the use of Lake Victoria

Most against

Lake Victoria should be left alone by humans entirely.

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  1. Approximately how much did the amount of Water Hyacinth decline between Jan 1999 and May 2001?

  • In which month and year did the rapid decline in Water Hyacinth begin?

  • In May 2001, what was the total areas covered by Water Hyacinth

Challenge

What do you think has caused the rapid decline in Water Hyacinth?

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Re-cap Quiz!

  1. What is the total area of Lake Victoria in kilometres squared?
  2. 68,800 b) 680,800 c) 6880

2. What are the names of the three countries that have a border with Lake Victoria?

3. What is meant by “hydroelectricity”?

4. Recap: Name two problems caused by Cairo’s rapidly growing population

5. Recap: State two rivers in Africa, not including the Nile!