Groundwater Recharge and Governance Quiz
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Questions and Answers

What is the main difference between drilled wells and dug wells?

  • Dug wells are more prone to contamination from pesticides and fertilizers.
  • Dug wells are shallower and penetrate unconsolidated materials.
  • Drilled wells are lined with wood, stone, or metal cribbing.
  • Drilled wells can be more than 1000 feet deep and penetrate unconsolidated materials. (correct)

    • What is the primary risk associated with drilled wells located within pits?

  • High levels of carbon dioxide and low oxygen in the pits. (correct)
  • Infestation of pests and flooding of pits.
  • Excessive depth of the drilled well.
  • Contamination from pesticides and fertilizers.

    • Why does BC Groundwater Regulation require drinking water wells to be a minimum of 30 meters or 100 feet from potential contaminant sources?

  • To protect the wellhead from freezing in cold temperatures.
  • To prevent the entry of pests and bacteria into the wells.
  • To avoid the need for excavation lined with wood, stone, or metal cribbing.
  • To minimize the risk of contamination from pesticides, vehicles, and septic tanks. (correct)

    • What is the term for the local gradient in the water table toward a well that is being pumped?

    <p>Cone of depression</p> Signup and view all the answers

    What are some negative effects of groundwater depletion?

    <p>Drying up of wells</p> Signup and view all the answers

    In which type of aquifer does the water table dip down to form a cone of depression when water is pumped through a well?

    <p>Unconfined aquifer</p> Signup and view all the answers

    What depends on factors such as material and thickness of the aquifer, amount of water in storage, and pumping rate?

    <p>Cone of depression</p> Signup and view all the answers

    What happens when groundwater pumping exceeds the recharge rate?

    <p>The aquifer is depleted</p> Signup and view all the answers

    What happens when a well is developed near a contaminated area and pumped at a sufficient rate to create a cone of depression?

    <p>The contaminated flow is captured for treatment</p> Signup and view all the answers

    What is the process called when wells are drilled into aquifers to recover groundwater?

    <p>Aquifer recharge</p> Signup and view all the answers

    What is the result of over-pumping from a groundwater aquifer over the long-term?

    <p>Reduction of water in streams and lakes</p> Signup and view all the answers

    What may take hours, days, or even years for surface infiltration to reach an aquifer as deep as 400 feet?

    <p>Aquifer recharge</p> Signup and view all the answers

    What is formed where the water table sinks at a specific point due to heavy pumping?

    <p>Cone of depression</p> Signup and view all the answers

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