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Hertswood Academy Geography GCSE The UK’s evolving Physical Landscape(year 11 revision version) > Part 9: The Storm Hydrograph > Flashcards

Part 9: The Storm Hydrograph Flashcards

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1
Q
  1. What is a drainage basin?
A

a. The area water flows from into a river

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2
Q
  1. What is a storm hydrograph and what does it show?
A

a. A graph that shows what happens to a river after rainfall.

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3
Q
  1. What 3 things are shown on the hydrograph?
A

a. The date/time
b. The amount of rainfall (mm)
c. Discharge in the channel

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4
Q
  1. What does discharge mean?
A

a. The amount of water in the river at one time

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5
Q
  1. What is discharge measured in?
A

a. Cumecs (cubic metres per second)

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6
Q
  1. What is the rising limb on the flood hydrograph?
A

a. The line showing how discharge rises after it has rained

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7
Q
  1. What is the lag time on the flood hydrograph?
A

a. The time between the heaviest rainfall and the highest discharge

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8
Q
  1. What is the falling limb on the flood hydrograph?
A

a. The line showing discharge falling after the rain stops

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9
Q
  1. What is base flow?
A

a. The normal amount of water in the river

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10
Q
  1. What is peak flow?
A

a. The maximum amount of water in the river

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11
Q
  1. Which things can impact the shape of the hydrograph?
A

a. Antecedent conditions - amount of precipitation
b. Geology (the type of rock)
c. Drainage basin shape
d. Soil type
e. Slopes

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12
Q
  1. What is urbanisation?
A

a. When towns grow bigger

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13
Q
  1. How does urbanisation affect the flood hydrograph?
A

a. Water flows into rivers more quickly

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14
Q
  1. What is land use change?
A

a. When people use land in different ways

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15
Q
  1. How does land use change affect the flood hydrograph?
A

a. It can increase the amount of concrete near the river

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16
Q
  1. What is deforestation?
A

a. When people cut down trees

17
Q
  1. How does deforestation affect the flood hydrograph?
A

a. Less water is absorbed

Hertswood Academy Geography GCSE The UK’s evolving Physical Landscape(year 11 revision version) (9 decks)

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