A-level W&C 5: Hydrographs

A hydrograph is

• a graph showing changes in the soil water store throughout the year

• a graph of river velocity against time

• a graph to show flow rate and infiltration capacity

• a graph of river discharge against time

A storm hydrograph is

• a graph showing the discharge of a river around a particular storm event

• a graph showing monthly average river discharge

• a graph showing rates of infiltration rates following a storm

• a graph showing changes in the size of stores

What is the key term to describe the shape of this hydrograph?

• Flashy

• Sudued

• Angular

• Rounded

What is the key term to describe the shape of this hydrograph?

• Flashy

• Sudued

• Angular

• Rounded

A flashy hydrograph often has...

• a small large drainage basin

• a large drainage basin

• a high drainage density

• a low drainage density

A subdued hydrograph often has...

• gentle slopes

• steep slopes

• saturated soil

• dry soil

If urbanisation has occurred, a hydrograph is more likely to be...

• flashy

• subdued

If rainfall is light, a hydrograph is more likely to be...

• flashy

• subdued

If rocks are permeable, a hydrograph is more likely to be...

• flashy

• subdued

This is the time between peak rainfall and peak discharge

• Log time

• Lag time

• Bag time

• Bog time