Hydrographs

Which type of drainage basin is more likely to flood - Impermeable bedrock OR Permeable bedrock?

• Impermeable bedrock

• Permeable bedrock?

What do we call the flow of water in a river, measured in cubic metres per second?

• River Discharge

• Cross sectional area v mean velocity

• Storm/Flood hydrograph

How do we calculate river discharge?

• Analyse Flood Hydrographs

• Cross sectional area v mean velocity

• Storm v Flood hydrograph

What kind of graph is used to show the change in discharge caused by a period of rainfall?

• Climate graph

• Bar chart

• Storm/Flood hydrograph

How can we predict flooding events, therefore influence implementation of flood prevention measures?

• Watch weather forecasts

• Analyse Flood Hydrographs

• Search google

How is rainfall shown in a flood hydrograph?

• Scatter graph

• Line graph

• Bar chart

What is the maximum discharge in the river called?

• Peak discharge

• Recession limb

• Lag time

What is the time difference between the peak of the rain storm and the peak flow of the river called?

• Precipitation

• Rising limb

• Basin lag time

What is the falling flood water in the river called

• Drought

• Recession limb

• Basin lag time

What is the normal discharge of the river called?

• Throughflow

• Ground waterflow

• Base flow