CH 2: Drainage Basins in South Africa
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Questions and Answers

What is the primary function of drainage basins in South Africa?

  • To form lakes
  • To create waterfalls
  • To collect and drain off precipitation (correct)
  • To produce groundwater

What is another term for drainage basins?

  • Waterfall zones
  • Lake regions
  • Catchment areas (correct)
  • Watershed areas

In a drainage basin, what does a tributary refer to?

  • A type of waterfall
  • A smaller stream that feeds into a larger river (correct)
  • An underground water source
  • A large river that feeds into the ocean

What is the term used for the point where two or more streams meet within a drainage basin?

<p>Confluence (C)</p> Signup and view all the answers

What is the role of a watershed in relation to drainage basins?

<p>It separates adjacent drainage basins (B)</p> Signup and view all the answers

What defines a river system within a drainage basin?

<p>The network of rivers and streams in the basin (B)</p> Signup and view all the answers

Which term refers to the geographic area where all precipitation flows to a single stream?

<p>Drainage basin (C)</p> Signup and view all the answers

What is the term for a higher land area between two rivers in the same drainage basin?

<p>Interfluve (D)</p> Signup and view all the answers

Which type of river originates from humid areas but flows through arid regions?

<p>Exotic Rivers (D)</p> Signup and view all the answers

What does the term 'water table' refer to?

<p>Upper surface of the zone of saturation (B)</p> Signup and view all the answers

Which drainage pattern is characterized by right-angle turns, often due to jointed rock?

<p>Rectangular (C)</p> Signup and view all the answers

What determines the hierarchy of streams from the smallest tributaries to the largest rivers?

<p>Stream Order (C)</p> Signup and view all the answers

In which type of flow do eddies and swirls occur, typical in fast-moving or obstructed streams?

<p>Turbulent Flow (C)</p> Signup and view all the answers

Which river management strategy is important for sustaining South Africa's drainage basins?

<p>(Pollution Prevention) (C)</p> Signup and view all the answers

(Stream order) refers to what aspect of rivers?

<p>(Hierarchy based on size and tributaries) (A)</p> Signup and view all the answers

What is the main purpose of a drainage basin in hydrology?

<p>Collecting and draining off precipitation into a common outlet (D)</p> Signup and view all the answers

Which term is synonymous with 'catchment area' in the context of drainage basins?

<p>Drainage basin (D)</p> Signup and view all the answers

What geographical feature separates adjacent drainage basins?

<p>Watershed (D)</p> Signup and view all the answers

In a river system within a drainage basin, what does a tributary do?

<p>Feed into a larger stream or river (A)</p> Signup and view all the answers

What does 'confluence' refer to in the context of drainage basins?

<p>The point where two or more streams meet (D)</p> Signup and view all the answers

Which factor contributes to the unique characteristics of South Africa's drainage basins?

<p>Climate and topography (D)</p> Signup and view all the answers

What distinguishes a river system from a drainage basin?

<p>Network of rivers and streams within the basin (A)</p> Signup and view all the answers

In hydrology, what defines the boundary separating adjacent drainage basins?

<p>Watershed (A)</p> Signup and view all the answers

What type of river flows only briefly following significant rainfall events?

<p>Episodic River (A)</p> Signup and view all the answers

What type of flow is characterized by chaotic flow with eddies and swirls, common in fast-moving or obstructed streams?

<p>Turbulent Flow (A)</p> Signup and view all the answers

Which drainage pattern resembles tree branches and is common in uniform soil and rock conditions?

<p>Dendritic (A)</p> Signup and view all the answers

In South Africa, which type of river originates from humid areas but flows through arid regions?

<p>Exotic River (C)</p> Signup and view all the answers

What term refers to the upper surface of the zone of saturation where the soil or rocks are fully saturated with water?

<p>Water Table (A)</p> Signup and view all the answers

What factor significantly affects drainage density and stream order in a region?

<p>Precipitation (C)</p> Signup and view all the answers

Which river management strategy is crucial for preventing pollution and restoring degraded catchment areas?

<p>Effective management and conservation strategies (A)</p> Signup and view all the answers

What type of river flows continuously throughout the year?

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

Which drainage pattern features right-angled tributaries, typical in folded mountain ranges?

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

What is the term for the smooth, layered flow of water in a river?

<p>Laminar Flow (C)</p> Signup and view all the answers

Which type of river in South Africa flows during certain seasons, typically in response to rainfall?

<p>Periodic Rivers (C)</p> Signup and view all the answers

What type of flow in a river system is smooth, layered, and well-ordered?

<p>Laminar Flow (A)</p> Signup and view all the answers

What type of river originates from humid areas but flows through arid regions in South Africa?

<p>Exotic Rivers (C)</p> Signup and view all the answers

Which drainage pattern features streams that radiate outward from a central point, such as a volcanic hill?

<p>Radial (D)</p> Signup and view all the answers

What factor significantly influences drainage density and stream order in a region?

<p>Topography (A)</p> Signup and view all the answers

Which type of river management strategy is essential for the sustainable management of South Africa's drainage basins?

<p>Pollution Prevention (A)</p> Signup and view all the answers

In which drainage pattern are streams parallel to each other and usually found on steep slopes?

<p>Parallel (C)</p> Signup and view all the answers

Where does groundwater primarily exist within the Earth's layers?

<p>In underground soil and rock layers (A)</p> Signup and view all the answers

'Trellis' drainage patterns are typically found in which geographical feature?

<p>Folded mountain ranges (C)</p> Signup and view all the answers

What term is used to describe water flowing over the land's surface from rain, snowmelt, or other sources?

<p>Surface Run-off (D)</p> Signup and view all the answers

What feature distinguishes a watershed from other geographical elements within a drainage basin?

<p>It is the boundary separating adjacent drainage basins. (A)</p> Signup and view all the answers

What term is used to describe a smaller stream that feeds into a larger stream or river within a drainage basin?

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

Which concept refers to the point where two or more streams meet within a drainage basin?

<p>Confluence (D)</p> Signup and view all the answers

What role does a river system play within a drainage basin?

<p>It refers to the network of rivers and streams within a drainage basin. (A)</p> Signup and view all the answers

What term describes the boundary that separates adjacent drainage basins in hydrology?

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

Which element of a drainage basin refers to the area where water is collected by the natural landscape?

<p>Catchment Area (D)</p> Signup and view all the answers

In hydrology, what do tributaries contribute to within a river system?

<p>They feed into larger streams or rivers. (B)</p> Signup and view all the answers

What is the primary function of a confluence within a river system?

<p>To mark the point where two or more streams meet. (D)</p> Signup and view all the answers

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