What is the definition of an aquiclude?

• A. A layer allowing free water movement
• B. A layer preventing water movement
• C. A source of freshwater
• D. A geological feature enhancing aquifer capacity

Answer: (B)

An aquiclude is defined as a geological formation that acts as a barrier to the movement of groundwater. This means that it prevents the flow of water through its layers, thereby inhibiting the vertical or horizontal movement of water. In practical terms, aquicludes can be composed of materials such as clay or unfractured rock, which have low permeability and do not allow water to pass through easily.

In comparison to layers that facilitate water movement, an aquiclude serves a critical function in hydrology by separating aquifers and confining them. This delineation is crucial for managing water resources, as it helps in understanding how different groundwater systems interact or remain isolated.