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Continuous extraction of water from a deep well has what effect on the water table?

Answer and explanation

Correct answer: It lowers the water table

The water table is the upper level of groundwater stored below the ground. It can rise when rainwater and other water sources recharge the underground layers. It can fall when people remove groundwater faster than nature replaces it. Continuous pumping from a deep well therefore reduces the amount of water underground and lowers the water table. The correct choice is B.

The other choices do not fit the usual result. Extraction does not raise the water table, and it normally has an effect when it continues for a long time. Water does not automatically become salty merely because it is pumped, although salinity can occur in particular coastal or geological conditions. The key idea is the balance between withdrawal and recharge: if withdrawal is greater than recharge, the groundwater level moves downward.

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