TBSHS GCSE Geography: Rivers 4 - human activity and flooding

The growth in urban areas has created more tarmac and concrete covered land meaning fewer ____________ surfaces

• impermeable

• permeable

More impermeable surfaces lead to...

• less water infiltrating into the ground

• more water infiltrating into the ground

• an increase in the speed and amount of runoff

• a decrease in the speed and amount of runoff

More impermeable surfaces lead to..

• an increase in river discharge

• a decrease in river discharge

• an increase in the speed and amount of runoff

• a decrease in the speed and amount of runoff

Deforestation DECREASES the amount of...

• surface runoff

• flooding

• interception

Deforestation to make way for farmland leads to..

• an increase in river discharge

• a decrease in river discharge

• an increase in the speed and amount of runoff

• a decrease in the speed and amount of runoff

Abstracting water to use for irrigation or for industrial processes...

• increases the discharge of a river

• leads to deposition rather than erosion

• reduces the discharge of a river

• leads to erosion rather than deposition

The artificial process of applying controlled amounts of water to land to assist in production of crops

• Groundwater flow

• Infiltration

• Irrigation

• Migration

Physical causes of river flooding

A lot of rainfall over a short period of time prevents...

• surface runoff

• infiltration

• flooding

Physical causes of river flooding

Rocks like ___________ are impermeable, so water is unable to percolate from the thin soil above

• limestone

• chalk

• granite

• sandstone

Physical causes of flooding

The following physical factors INCREASE the risk of flooding

• Urbanisation

• Snow melt in spring

• Steep sided valleys

• Permeable rocks