revision questions on rivers and flooding Flashcards

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1
Q

what does the hydrological cycle show?

A

the movement of water in a cycle

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2
Q

what happens at a confluence?

A

two or more rivers meet

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3
Q

what is biological weathering?

A

weathering that is caused by things such as roots from plants

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4
Q

what is corrasion?

A

a type of erosion

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5
Q

how is a gorge formed

A

by a waterfall retreating

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6
Q

what is a flood plain?

A

the area of land that the river would flood

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7
Q

where is the current fastest in a meander?

A

on the outside of the bend

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8
Q

name the land form created when a meander is cut off by deposition?

A

an ox-bow lake

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9
Q

what is river discharge?

A

the amount of water in the river

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10
Q

how does impermeable rock affect river discharge?

A

because the water doesn’t percolate into the rock and instead run off is increased which also increases the discharge of the river

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11
Q

describe one physical cause of flooding?

A
  • prelonged rain fall
  • heavy rainfall
  • snow melt
  • relief
  • geology
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12
Q

describe one human cause of flooding?

A
  • deforestation

- urbanisation

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13
Q

name a hard engineering method for flooding?

A
  • dams and reservoirs
  • channel straightening
  • man-made levees
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14
Q

name a soft engineering method for flooding?

A
  • flood warnings
  • preparation
  • flood plain zoning
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