Case study: Examples of land use change

Question 1

Examples (3)

Answer 1

Amazon
Water abstraction from S. England
Water abstraction in London Basin

Question 2

Amazon

Answer 2

Land use change - deforestation to pasture
New vegetation has shallow roots
More runoff into river
Less evaporation
Changes in water resources not limited to catchment

Question 3

S. England

Answer 3

Overabstraction from chalk streams
Reduces flow
In summer, demand so high rivers dry up - decrease discharge

Question 4

London Basin

Answer 4

Overabstraction of chalk basin aquifer
88m below sea level in 1960s
Recovered by 3m/yr by 1990s
General Aquifer Research and Development Investigation Team (GARDIT) set up methods to artificially recharge