Unit 1B - Hot Deserts - Strategies to reduce risk of desertification Flashcards Preview

Geography - Unit 1B - The Living World > Unit 1B - Hot Deserts - Strategies to reduce risk of desertification > Flashcards

Flashcards in Unit 1B - Hot Deserts - Strategies to reduce risk of desertification Deck (11)
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1

4 main strategies for reducing risk of desertification?

Water management, tree planting, soil management, appropriate technology

2

2 ways water management reduces risk of desertification?

- grow crops that don't need much water to reduce water use
- using drip irrigation on crops than surface irrigation means soil isn't eroded by lots of water added all in one go

3

3 ways tree planting reduces risk of desertification?

- planted to act as windbreaks to reduce wind erosion
- provide shade for crops which reduces temperature and evaporation rates
- used to stabilise sand top prevent desert from encroaching on farm land

4

3 ways soil management reduces risk of desertification?

- leaving land to rest in between grazing or planting to let them recover their nutrients
- compost can be added to add extra nutrients
- rotating crops to stop same nutrients being removed

5

1 way appropriate technology reduces risk of desertification?

- uses cheap, sustainable and easily available materials, easy for local people to maintain

6

Type of trees planted and where to reduce desertification?

Acacia trees planted (afforestation) and native to Senegal, Sahara

7

An advantage and disadvantage of planting acacia trees?

+ve - Prevents soil erosion, provides nutrients, removes carbon from atmosphere
-ve - Unreliable rainfall and not all areas may be provided with an education or seeds

8

Where are stone lines used?

Burkina Faso

9

Advantage and disadvantage of using stone lines?

+ve - water is maintained and used, nutrient rich sediment trapped - enable growth and cheap, low skilled, sustainable method
-ve - Labour intensive, unreliable rainfall

10

Size of Zai planting pits?

25cm deep, 25cm diameter, 90cm apart

11

Advantage and disadvantage of Zai planting pits?

+ve - maintains water and nutrients, prodces compost and increased yields
-ve - labour intensive, unreliable rainfall