Question

Which process in the hydrologic cycle directly contributes to groundwater recharge?

• A. Surface runoff
• B. Evapotranspiration
• C. Precipitation interception
• D. Infiltration and percolation

Hint:

Groundwater recharge process: \[ \boxed{ \text{Rainfall} \rightarrow \text{Infiltration} \rightarrow \text{Percolation} \rightarrow \text{Aquifer Recharge} } \]

Answer 1

The Correct Option is D

Step 1: Trace the path water takes to reach the water table.
Precipitation first infiltrates into the topsoil, entering the unsaturated zone.
Step 2: Follow the water downward.
From there it percolates further down through the soil and rock until it reaches the saturated zone, adding to the groundwater store.
Step 3: Rule out the other processes.
Surface runoff and interception keep water on or near the surface, and evapotranspiration returns water to the atmosphere, so none of these add to groundwater.
\[ \boxed{\text{Infiltration and percolation}} \]