GCSE Geography (OCR A)

Topic Summaries

River landscapes

Hydrographs

A hydrograph shows the relationship between precipitation (rainfall) and discharge (water flow in a river) over time. Hydrographs are useful for flood prediction by predicting the likelihood of flooding by analysing how quickly a river responds to rainfall, and for flood warnings to issue alerts and plan evacuations. The key components of a hydrograph are:

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