ChestertonCC - Geo - GCSE - human causes of flooding

_____ is the amount of water in a river channel.

• discharge

• capacity

• volume

• maximum

_____ is the most water a river channel can hold.

• discharge

• capacity

• volume

• maximum

A river floods when its discharge is _____ than its capacity.

• less

• more

Flood risk increases when water is able to _____ travel to a river.

• quickly

• slowly

The expansion of _____ areas increases flood risk because _____ surfaces are constructed.

• urban

• rural

• permeable

• impermeable

Roads made of _____ are an example of impermeable surfaces in urban areas.

Tarmac and concrete roads in urban areas increase _____.

• surface run off

• interception

• percolation

• infiltration

More surface run off causes water to _____ reach a river.

• quickly

• slowly

Urban expansion involves deforestation. Less trees reduces the _____ of precipitation by their leaves.

• infiltration

• percolation

• surface run off

• interception

Less interception causes water to more _____ reach a river.

• quickly

• slowly