Storm Hydrographs and the Hydrological Cycle

Name Label 1 on the hydrograph...

• rising limb

• recession limb

• base flow

• overland flow

Name label 1 on the hydrograph

• rising limb

• recession limb

• base flow

• groundwater flow

What is Label 1?

• peak discharge

• bankfull stage

• peak rainfall

• lag time

Lag time =

• peak rainfall to peak discharge

• start of rainfall to peak discharge

• end of rainfall to peak discharge

Label 1 shows...

• overland flow

• base flow

• throughflow

Label 2 shows...

• overland flow

• base flow

• throughflow

Label 3 shows...

• overland flow

• base flow

• throughflow

River discharge is measured in ...

• metres cubed per second

• metres per second

• litres per second

• millilitres per second

urbanised catchment?

• hydrograph A

• hydrograph B

Which hydrograph, A or B, is more likely for a round drainage basin?

• 
• 

Answer explanation

A round drainage basin reduces the distance water has to travel to get to the stream, reducing lagtime, increasing the angle of the rising limb and the chances of flooding. In a long thin drainage basin it takes the water a long time to get to the channel and then a long distance to get to the monitoring station.