3.a Water extraction, Combustion, Sequestration

Question 1

what is water extraction

Answer 1

removal of water rom surface and ground water stores to meet public demand

Question 2

water table

Answer 2

extraction > recharge = reduced water table
- fluctuates seasonally

Question 3

aquifers

Answer 3

• permeable or porous water bearing rocks
  water is extracted from aquifers to meet public supply by wells

Question 4

artisan basin

Answer 4

• when they are tapped they will flow water to the surface under its own pressure (artisan pressure)
• e.g London

Question 5

extraction

Answer 5

• if rates of extraction exceed recharge rates (rainfall) then can lead to water scarcity

Question 6

combustion

Answer 6

• fossil fuels
• dependant on fossil fuels even after discovery of nuclear energy
• releases 1o billion tonnes of co2 into atmosphere annually

Question 7

carbon sequestration

Answer 7

• carbon, capture and storage
• co2 is compressed and transported by pipeline to storage areas
• then injected into porous rocks
• large costs and energy amounts .
• requires specific geological needs for storage