Groundwater Answers

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Over half of the people in the United States rely on groundwater for drinking water.

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Which of the following can lead to groundwater shortages?

pollution

use exceeding the rate of replenishment

lack of precipitation

all of the above

The Karez well system _______.

was the first known use of wells

was a postindustrial system

transported groundwater from a distance

all of the above

How is groundwater replenished?

precipitation

streams

rivers

all of the above

Groundwater is only found below the water table.

How does groundwater become polluted?

Pollutants mixed with water pass through permeable layers above the aquifer.

Factories dump their waste directly into aquifers.

Refuse infiltrates the water table when garbage is dumped.

All of the above

What is a possible long-term consequence of groundwater overdraft?

increased vegetation

unproductive wells

polluted groundwater

higher water tables

The use of wells to obtain drinking water is a modern convenience.

What happens if the use of groundwater exceeds the rate of replenishment?

the depth of the water table increases

the water table is more likely to be polluted

the depth of the water table decreases

the water table remains unchanged

Why is groundwater an important source of freshwater storage?

It constitutes approximately 30% of Earth’s freshwater.

It is the only viable source of freshwater in some areas.

It is available in conditions of drought.

All of the above

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