Hydrographs and Flooding (AQA GCSE Geography): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What units is river discharge measured in?
What units is river discharge measured in?
Cubic metres per second
What do hydrographs show?
What do hydrographs show?
Discharge changes over time vs rainfall
What is peak discharge?
What is peak discharge?
Maximum water held in the channel
What does lag time measure?
What does lag time measure?
Time between peak rainfall & discharge
What does the rising limb show?
What does the rising limb show?
Increase in discharge
What is base flow?
What is base flow?
Normal discharge of the river
How does plenty of vegetation affect lag time?
How does plenty of vegetation affect lag time?
Causes longer lag time
What happens when there is no vegetation?
What happens when there is no vegetation?
Water runs off quicker, short lag time
How does short lag time affect flood risk?
How does short lag time affect flood risk?
Increases flood risk
What happens after a long period of rain?
What happens after a long period of rain?
Soil becomes saturated
Why are clay soils linked to increased flood risk?
Why are clay soils linked to increased flood risk?
They are impermeable
How do steep valley sides affect flooding?
How do steep valley sides affect flooding?
Water reaches river quicker