Changes to the Water Cycle Flashcards

1
Q

What are 5 changes to the water cycle?

A
  • seasonal changes
  • water abstraction
  • deforestation
  • farming practices
  • land use change
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2
Q

How does deforestation impact the water cycle on a smaller scale?

A
  • reduced interception
  • more surface runoff and more infiltration
  • increase river discharge
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3
Q

How does large scale deforestation impact the water cycle?

A
  • reduced evapotranspiration
  • reduced rainfall
  • so less water in a drainage basin system, more water elsewhere
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4
Q

How does irrigation impact the water cycle?

A

reduces water in river channels

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5
Q

How does ploughing soil impact the water cycle?

A
  • increases pore spaces
  • more infiltration
  • potentially more soil erosion
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6
Q

How does compacting soils impact the water cycle?

A
  • less infiltration
  • more overland flow
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7
Q

How does deforestation for agriculture impact the water cycle?

A
  • interception reduced, larger vegetation replaced with arable crops
  • however, at least some crops and not urbanisation
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8
Q

Why might urbanisation be a significant factor affecting the water cycle in the future?

A

population growth putting pressure on urban areas to expand

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9
Q

How does urbanisation impact the water cycle?

A
  • impermeable surfaces
  • water enters river channels more quickly
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10
Q

How does water abstraction impact the water cycle?

A
  • less water in aquifers/groundwater
  • takes longer to be recharged and can deplete ground water stores
  • reduces water flowing to rivers
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11
Q

Why might water abstraction be a significant factor affecting the water cycle in the future?

A

population growth, especially in countries with less rainfall

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