Geography of the Orange and Chad Basins
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Questions and Answers

What is the name of the longest river in South Africa?

The Orange River

What is the name of the major tributary of the Orange River?

The Vaal River

Navigation on the Orange River is easy and straightforward.

False (B)

What is the largest inland drainage area in Africa?

<p>The Chad basin</p> Signup and view all the answers

What is the name of the major water body within the Chad basin?

<p>Lake Chad</p> Signup and view all the answers

What is the range of the size of the Chad basin?

<p>From about 10,360 sq km to about 25,900 sq km</p> Signup and view all the answers

What is the name of the semi-arid strip of land where the Chad basin is located?

<p>The Sahel</p> Signup and view all the answers

The Chad basin is largely unaffected by high temperatures and seasonal evaporation.

<p>False (B)</p> Signup and view all the answers

Flashcards

Orange River

The longest river in South Africa, known for its irregular flow and numerous falls and rapids.

Vaal River

A major tributary of the Orange River and a northern headwater, this river is also significant in South Africa.

Chad Basin

The largest inland drainage area in Africa, encompassing a significant portion of the continent.

Lake Chad

The main water body of the Chad Basin, known for its fluctuating size depending on the season.

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Lake Chad's size variation

The size of Lake Chad varies depending on the season, ranging from a minimum of around 10,360 sq km to a maximum of around 25,900 sq km.

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Sahel

A semi-arid region separating the Sahara Desert from the humid savannas, encompassing Lake Chad within its range.

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Evaporation in the Chad Basin

High temperatures in the Chad Basin lead to significant water evaporation, particularly during dry periods.

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High regional temperatures

The Chad Basin experiences high temperatures throughout the year, impacting the region's climate and water resources.

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Unavailability of Navigation on the Orange River

The Orange River is not navigable due to its unpredictable flow, frequent falls and rapids, and silt accumulation in the channels and at its mouth.

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Features hindering navigation on the Orange River

The Orange River's characteristics, including its irregular flow, falls and rapids, and siltation, make it unsuitable for navigation.

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Study Notes

3.2.5 The Orange Basin

  • The Orange River is the longest river in South Africa
  • Its major tributary, the Vaal River, is a northern headwater
  • Navigation is difficult due to irregular flow, waterfalls, rapids, and silting in channels and at the river mouth

3.2.6 The Chad Basin

  • The Chad basin is Africa's largest inland drainage area
  • Its primary water body is Lake Chad
  • Seasonal size fluctuation: 10,360 sq km to 25,900 sq km
  • Located in the Sahel, a semi-arid region between the Sahara Desert and humid savannas
  • High temperatures in the region lead to high rates of seasonal evaporation.

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Description

Explore the unique characteristics of the Orange and Chad basins, two significant geographic regions in Africa. Learn about the Orange River and its tributaries, along with the seasonal dynamics of Lake Chad in the Sahel. This quiz will test your knowledge of these two important water systems.

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