Natural Systems Geog AQA A Level CGP p9 Variations in Runoff 2

Hydrographs and the water cycle are affected by natural physical processes and human activity. Identify three natural processes from the list below.

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Intense storms generate more precipitation and greater peak discharges than light rain showers.

• True

• False

An intense storm generates more precipitation and the larger input of water causes ............. (runoff) and storage (groundwater storage) to increase in size.

• flow

• infiltration

• percolation

Some flows, e.g. (a)   , may not be able to occur rapidly enough for the size of input, as a result runoff is increased. Tick correct answers

What happens to the water in a drainage basin when the temperature drops below freezing? (Tick 2)

• There is a reduction in the flow of water

• There is an increase in the flow of water

• There is an increase in the amount of frozen ice in the stores

What happens within a drainage basin when temperatures rise above freezing?

• Output can be much larger as the ice melts

• Flows return as the ice melts

• The store of frozen water decreases

Vegetation intercepts precipitation and slows its movement to the river channel.

• True

• False

Most plants show a seasonal variation because vegetation usually dies back in .............

• spring

• summer

• autumn

• winter

Interception is at its highest when there are lots of leaves on the deciduous trees. During which two seasons would you expect to see greater interception.

• Spring

• Summer

• Autumn

• Winter

The more vegetation in a drainage channel the more water is lost through which two outputs of the drainage basin?

• evaporation

• condensation

• transpiration