Which term denotes a geological formation that can store and transmit groundwater, crucial for agricultural irrigation?

• A. Aquifer
• B. Reservoir
• C. Terracing
• D. Biodiversity

Answer: (A)

At the heart of this concept is an underground layer that holds and moves groundwater, making it available for irrigation. An aquifer is formed by permeable rock or sediment with enough pore space to store water and enough connectivity to allow it to flow. This stored groundwater can be tapped with wells to water crops, which is crucial in areas with limited surface water or seasonal rainfall.

Aquifers can be unconfined, where the upper surface is the water table and recharge happens from above, or confined, trapped between impermeable layers and often under pressure. Proper management considers recharge rates and withdrawal to avoid depletion or contamination.

Reservoir refers to surface water storage, natural or artificial, not an underground formation. Terracing is a soil and water conservation technique to reduce runoff, not store groundwater. Biodiversity concerns the variety of living organisms in an area, not groundwater storage.