10 terms

GCSE Hydrographs

A set to help you revise hydrographs, from http://www.coolgeography.co.uk
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Discharge
The amount of water in a river per second
Hydrograph
A graph showing rainfall and a rivers response to it
Peak discharge
The highest amount of water in a river following a rain event
Peak rainfall
The highest amount of rain in a rainfall event
Lag time
The time between peak rainfall and peak discharge
Rising limb
Where river levels are climbing
Base flow
The contribution to river levels from groundwater flow
Storm runoff
The excess water in a channel from a rainfall event
Falling limb
Where levels in the river are descending
CUMECS
Cubic metres per second