Natural Systems A Level Geography CGP p7 Drainage Basins (2)

A ....... is water moving from one place to another.

• flow

• input

• output

Infiltration is a process whereby water soaks into or is absorbed by the soil. Tick all factors that influence infiltration rates?

• amount of water already in the soil

• degree of slope

• soil type and structure

• vegetation cover

• duration of rainfall

.................. also known as runoff is water flowing over the land; it happens when rain falls on the ground faster than infiltration can occur.

• Groundwater flow

• Overland flow

• Through flow

Overland flow can flow over the whole surface or in little channels on the surface.

• True

• False

Identify the types of flow indicated by the letters A and B.

• (A) Percolation

  (B) Throughflow

• (A) Stemflow

  (B) Throughfall

• (A) Stemflow

  (B) Percolation

Throughflow is water moving slowly downhill through the soil. The rate of throughfall is faster through natural 'pipes' e.g. ...............

Which of the following is the odd one out?

• animal burrows

• cracks in the soil

• surface channels

(a) ...................... is defined as the downward entry of water into the soil or rock surface and (b) ................... is the flow of water through the soil into the bedrock which is below the water table

• (a) Percolation

  (b) Infiltration

• (a) Infiltration

  (b) Percolation

Groundwater is water flowing slowly below the water table through ..................... rock such as limestone.

• impermeable

• permeable

A highly permeable rock with lots of joints allows water to pass through it more quickly than one that has close fitting pores.

• true

• false

....................is the portion of the groundwater flow that is sustained between precipitation events, and fed to streams by delayed pathways e.g. banks and river beds.

• baseflow

• channel flow

• interflow