Geography - Theme 1 - Flooding

Annual regime

the varying river discharge throughout the year

Discharge

The amount of water running through the river channel

Flash floods

Flooding caused by a sudden downpour of rain - doesn’t have time to soak into ground

Ground water store

Water in the ground

Groundwater flow

The flow of water through rocks

Hazard map

A plan that shows the extent of a hazard

Hydrograph

A line graph that shows the variation of of discharge in a river

Infiltration

The movement of rain, water or snow into soil

Overland flow

The flow of water across ground surface

Porosity

The ability for a rock to store water in tiny air spaces

Surface stores

Places where water is found on the surface - eg lakes and rivers

Throughflow

The downhill flow of water through soil