AS A Level Geography Quiz: Storm Hydrographs

1. What is a storm hydrograph? Select all the correct answers

It is built across a river channel to measure storm discharge

It measures peak discharge in metres per second

It is different from a flood hydrograph

It calculates lag time

2. Which statement correctly describes the recession limb?

It happens twice after each rain event

It is when the river’s discharge falls after reaching a peak discharge

None of the above

It is when the river recedes upstream after a rain/precipitation event

3. Which of the following does not affect the shape of a storm hydrograph?

Drainage density

Drainage pattern

Slope

Vegetation type

4. What is peak flow as shown on a storm hydrograph?

It’s the highest discharge a river reaches each season

It is the lowest flow the river reaches each season

It is the lowest flow after or before a rain event

It is the highest flow after a precipitation event in the river channel

5. Which is not true about storm hydrographs?

They show river discharge for the entire rain season

They are also known as flood hydrographs

They show lag time after an event before peak discharge is reached

They show changes in discharge over time

6. Which land uses affects the shape of a storm hydrograph? Select all the right answers.

Reafforestation

Urbanisation

Deforestation

Farming

7. Which of the following affects the shape of a storm hydrograph?

Rock type

Meanders

Channel size

River stage

8. How does urbanisation affect the shape of a hydrograph? Choose all the right answers.

Longer peak discharge

Shorter discharge

Longer lag time

Lower peak discharge

Rising limb becomes less steep

Higher peak discharge

Steeper rising limb

9. Which statement correctly describes what a rising limp is?

It occurs once to discharge during the rain season

There is no such thing

It shows increasing river discharge after a rain/precipitation event in the basin

It’s the highest discharge reached by a river after a rain/precipitation event in the basin

It is the tributary with the highest discharge in the drainage basin

10. Which is true about storm hydrographs?

They are all computer-generated animations

They only ever need to be constructed once each season

They are not really useful to humans

They have to be constructed for each rain event

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AS A Level Geography Quiz: Storm Hydrographs- Updated 2025

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