1. Higher Hydrosphere Hydrological Cycle: Human
Today I will: - Know how humans have an impact on the hydrological cycle
The Hydrological Cycle is a natural process; however, humans can have an impact on the system in various ways

2. Higher
Hydrosphere
As I go through the PowerPoint add in the relevant information to your mind map.
Feel free to add additional information from your summary notes or textbook when you are finished.

3. Mining for gold in the Amazon
Higher
Hydrosphere
Mining
- Lakes, rivers and reservoirs ‘silt up’ leading to reduced storage capacity in these areas.
There is reduced vegetation cover which leads to:
increased run-off
lower evapo -transpiration and cloud formation altering the rainfall pattern.
Mining for gold in the Amazon

4. Higher Hydrosphere Irrigation
- It involves taking water from a river or underground store which can:
reduce river flow
lower water tables
It can increase evaporation/evapo-transpiration by placing water in surface stores (ditches/canals)
Crops remove water from the cycle as they grow

5. Higher Hydrosphere Deforestation Cutting down trees increases run-off
It decreases evapo-transpiration (and therefore cloud formation)
more extreme river flows as water is not intercepted

6. Higher Hydrosphere Urbanisation
- The removal of natural vegetation and
replacement with impermeable surfaces and
drains can speed up overland flow and
evaporation and can lead to higher river levels.
- It also decreases the amount of water which returns to groundwater storage, possibly reducing the water table.
- It requires taking water for use in the cities which reduces water in rivers (due to reservoirs) or groundwater (due to wells)

7. Higher
Hydrosphere
Sqa 2012

8. Higher
Hydrosphere