ESC3019 Hydrosphere and Lithosphere Lecture 10: Groundwater
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Questions and Answers

What percentage of the hydrosphere does groundwater represent?

  • 0.6% (correct)
  • 1.5%
  • 3.4%
  • 2.8%

    • How is groundwater resupplied?

  • By slow infiltration of precipitation (recharge) (correct)
  • By condensation of water vapor
  • By surface runoff
  • By rapid infiltration of precipitation

    • What is the main method of accessing groundwater?

  • Pumping water from rivers
  • Desalination plants
  • Extracting from underground aquifers (correct)
  • Using rainwater harvesting systems

    • What determines the magnitude of porosity in groundwater?

    <p>Particle size and arrangement</p> Signup and view all the answers

    What is groundwater?

    <p>Water that fills pores in sediments and sedimentary rocks as well as fractures in other rock types</p> Signup and view all the answers

    What is the primary method of recharging groundwater?

    <p>Infiltration of precipitation</p> Signup and view all the answers

    What percentage of the hydrosphere does groundwater represent?

    <p>0.6%</p> Signup and view all the answers

    What is an aquifer?

    <p>An underground layer of water-bearing rock</p> Signup and view all the answers

    What causes groundwater to move?

    <p>Gravitational forces</p> Signup and view all the answers

    What is salt-water intrusion related to in the context of groundwater?

    <p>Infiltration of sea water through rocks into freshwater aquifers</p> Signup and view all the answers

    What is the primary method of accessing groundwater?

    <p>Drilling wells</p> Signup and view all the answers

    What is the primary cause of movement for groundwater?

    <p>Gravity</p> Signup and view all the answers

    In the context of groundwater, what does porosity refer to?

    <p>The size of water-bearing openings in the ground</p> Signup and view all the answers

    What is the primary method of recharging groundwater?

    <p>Infiltration of precipitation</p> Signup and view all the answers

    What percentage of the hydrosphere does groundwater represent?

    <p>0.6%</p> Signup and view all the answers

    What is salt-water intrusion related to in the context of groundwater?

    <p>Over-pumping of groundwater causing saltwater to intrude into aquifers</p> Signup and view all the answers

    What is the primary method of recharging groundwater?

    <p>Infiltration of surface water</p> Signup and view all the answers

    What is an unconfined aquifer?

    <p>An aquifer with a layer of impermeable rock above it</p> Signup and view all the answers

    What causes groundwater to move?

    <p>Infiltration and percolation</p> Signup and view all the answers

    What is porosity in the context of groundwater?

    <p>The ability of the material to transmit water</p> Signup and view all the answers

    What percentage of the hydrosphere does groundwater represent?

    <p>0.6%</p> Signup and view all the answers

    What is salt-water intrusion related to in the context of groundwater?

    <p>The movement of saltwater into freshwater aquifers</p> Signup and view all the answers

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