What is Water Table?

• A. The level below which the ground is saturated with water
• B. The surface of groundwater
• C. The upper soil layer where water drains
• D. The level where roots can't reach water

Answer: (A)

The water table is the boundary between the saturated and unsaturated zones underground. It marks the level below which all the pore spaces in the soil or rock are filled with water. Above this level, the pores contain air and water in varying amounts.

This makes the description “the level below which the ground is saturated with water” the most precise definition. It’s the dividing line where groundwater begins. In some places the surface of groundwater is discussed as the water table, but that surface can be uneven and shift with rainfall, pumping, and geology. The other options describe different ideas (like a surface where water drains from the soil, or a depth where roots can’t reach water), which aren’t the standard boundary that defines groundwater saturation.