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Questions and Answers
What primarily causes the rises and falls of water in artesian wells?
What primarily causes the rises and falls of water in artesian wells?
- Changes in well depth
- Changes in water table elevation
- Changes in storage volume
- Changes in pressure (correct)
What does the piezometric surface of a confined aquifer coincide with?
What does the piezometric surface of a confined aquifer coincide with?
- Storage volume of the water
- Hydrostatic pressure level of the water (correct)
- Well depth
- Water table elevation
How is a confined aquifer defined operationally?
How is a confined aquifer defined operationally?
- By determining water table elevation
- By monitoring well depth
- By measuring storage volume
- By drilling (correct)
When does a flowing well result in a confined aquifer?
When does a flowing well result in a confined aquifer?
What happens to a confined aquifer when the piezometric surface falls below the confining bed?
What happens to a confined aquifer when the piezometric surface falls below the confining bed?
What defines the elevation of the piezometric surface in a well penetrating a confined aquifer?
What defines the elevation of the piezometric surface in a well penetrating a confined aquifer?
In a confined aquifer, what causes flow according to the text?
In a confined aquifer, what causes flow according to the text?
What condition is necessary for groundwater flow in an unconfined aquifer?
What condition is necessary for groundwater flow in an unconfined aquifer?
Where does the water rise to in a confined aquifer according to the text?
Where does the water rise to in a confined aquifer according to the text?
What is the role of the impermeable layer in a confined aquifer?
What is the role of the impermeable layer in a confined aquifer?
In which type of aquifer does the hydraulic head need to create a gradient for flow?
In which type of aquifer does the hydraulic head need to create a gradient for flow?
What causes groundwater flow in an unconfined aquifer under flow conditions?
What causes groundwater flow in an unconfined aquifer under flow conditions?
What is the main reason water in a well penetrating an artesian aquifer may rise above the land surface?
What is the main reason water in a well penetrating an artesian aquifer may rise above the land surface?
What causes the water level or piezometric head in a confined aquifer to be above the top of the aquifer?
What causes the water level or piezometric head in a confined aquifer to be above the top of the aquifer?
What creates an additional component of pressure head in confined aquifers that causes water in a well to rise above the point of saturation?
What creates an additional component of pressure head in confined aquifers that causes water in a well to rise above the point of saturation?
Which term refers to layers that overlay the low-permeability units in a confined aquifer?
Which term refers to layers that overlay the low-permeability units in a confined aquifer?
In a confined aquifer, what is generally true about the water pressure compared to atmospheric pressure?
In a confined aquifer, what is generally true about the water pressure compared to atmospheric pressure?
What is the term used for wells tapping a confined aquifer where water rises above the land surface without pumping?
What is the term used for wells tapping a confined aquifer where water rises above the land surface without pumping?
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