Which statement about groundwater recharge is correct?

Which statement about groundwater recharge is correct?

• A. It is the process of water percolating through soil to replenish an aquifer.
• B. It only occurs during rainfall events.
• C. It cannot occur in confined aquifers.
• D. It is the same as surface runoff.

Answer: (A)

Groundwater recharge is the process by which water moves downward through soil and rock to replenish an aquifer. This happens when infiltrating water percolates through the soil and reaches the aquifer, which is why the description of water percolating through soil to replenish an aquifer is the best representation. Recharge isn’t limited to rainfall alone; water from snowmelt or irrigation can also infiltrate and contribute to recharge, depending on conditions. It’s different from surface runoff, which flows over the land surface rather than seeping downward. Recharge can occur in confined aquifers as well, through leakage or in zones where the confining layer isn’t completely impermeable, so the idea that it cannot happen there isn’t correct.

Groundwater recharge is the process by which water moves downward through soil and rock to replenish an aquifer. This happens when infiltrating water percolates through the soil and reaches the aquifer, which is why the description of water percolating through soil to replenish an aquifer is the best representation. Recharge isn’t limited to rainfall alone; water from snowmelt or irrigation can also infiltrate and contribute to recharge, depending on conditions. It’s different from surface runoff, which flows over the land surface rather than seeping downward. Recharge can occur in confined aquifers as well, through leakage or in zones where the confining layer isn’t completely impermeable, so the idea that it cannot happen there isn’t correct.