13 Questions
What is the main difference between drilled wells and dug wells?
Drilled wells can be more than 1000 feet deep and penetrate unconsolidated materials.
What is the primary risk associated with drilled wells located within pits?
High levels of carbon dioxide and low oxygen in the pits.
Why does BC Groundwater Regulation require drinking water wells to be a minimum of 30 meters or 100 feet from potential contaminant sources?
To minimize the risk of contamination from pesticides, vehicles, and septic tanks.
What is the term for the local gradient in the water table toward a well that is being pumped?
Cone of depression
What are some negative effects of groundwater depletion?
Drying up of wells
In which type of aquifer does the water table dip down to form a cone of depression when water is pumped through a well?
Unconfined aquifer
What depends on factors such as material and thickness of the aquifer, amount of water in storage, and pumping rate?
Cone of depression
What happens when groundwater pumping exceeds the recharge rate?
The aquifer is depleted
What happens when a well is developed near a contaminated area and pumped at a sufficient rate to create a cone of depression?
The contaminated flow is captured for treatment
What is the process called when wells are drilled into aquifers to recover groundwater?
Aquifer recharge
What is the result of over-pumping from a groundwater aquifer over the long-term?
Reduction of water in streams and lakes
What may take hours, days, or even years for surface infiltration to reach an aquifer as deep as 400 feet?
Aquifer recharge
What is formed where the water table sinks at a specific point due to heavy pumping?
Cone of depression
Test your knowledge of groundwater recharge and governance with this quiz. Explore topics such as surface infiltration, artificial groundwater recharge, challenges of over-pumping, and governance issues.
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