| Groundwater comes from an aquifer, an underground zone of saturated sand, gravel, or rock that yields significant quantities of water. |
| Therefore, what happens to groundwater at one spot can easily affect the aquifer at another. |
| An aquifer is an underground bed of earth, gravel or porous stone that stores water. |
| The groundwater moved through the aquifer which was close to the Carrigower River, a designated Special Area of Conservation. |
| Water enters the aquifer system as it drains into cracks and crevasses in the aquifer recharge zone. |
| Salt water edged into the aquifer, tainting the drinking water of the burgeoning urban areas. |
