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Agriculture Weed Control (Category 103) Practice Exam

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The upper boundary of groundwater within an aquifer is known as the
Correct Answer:
Water table
Explanation:
The boundary is the water table. It marks the upper surface of the saturated zone where pores in the soil and rock are filled with groundwater, separating it from the unsaturated zone above. In an unconfined aquifer, the water table roughly follows the land surface and rises with recharge from rainfall and falls during drought. Permeability explains how easily water moves, and an aquifer is the rock layer that stores groundwater, while a plume refers to contaminant distribution—not to the boundary itself.

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