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 is different from a flood hydrograph

It measures peak discharge in metres per second

It calculates lag time

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

Drainage pattern

Drainage density

Vegetation type

Slope

3. Which is true about storm hydrographs?

They have to be constructed for each rain event

They are all computer-generated animations

They are not really useful to humans

They only ever need to be constructed once each season

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

Farming

Urbanisation

Reafforestation

Deforestation

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

Lower peak discharge

Higher peak discharge

Longer lag time

Longer peak discharge

Shorter discharge

Steeper rising limb

Rising limb becomes less steep

6. Which is not true about storm hydrographs?

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

They show changes in discharge over time

They show river discharge for the entire rain season

They are also known as flood hydrographs

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

Rock type

Channel size

Meanders

River stage

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

It occurs once to discharge during the rain season

There is no such thing

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

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

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

9. 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

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

None of the above

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

It is the lowest flow the river reaches each season

It is the lowest flow after or before a rain event

It’s the highest discharge a river reaches each season

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

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