Human Impacts On Global Hydrological Cycle

Question 1

1

Answer 1

Greenhouse effect

-fossil rules raise earths temperature = increase evaportranspiraton

Question 2

2

Answer 2

Hydroelectricity
- affects up and downstream flow
Water table can be lowered as less water flows through the ground

Question 3

3

Answer 3

Irrigation

Removal of water from natural sources = lowers water table and higher run off levels
Dams and canals = more evaporation

Question 4

4

Answer 4

Deforestation

Less water to be evaporated so less rain and increased run off due to less foliage to be intercepted

Question 5

5

Answer 5

Mining
Silting of lakes = less surface storage
Reduced vegetation= higher surface run off levels

Question 6

6

Answer 6

Urbanisation
reduced natural vegetation = higher run off levels
Increased impermeable surfaces = more flood risks
Storm water can be carried directly into streams