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| aquifer Layers of rock, sand or gravel that can absorb water and allow it to flow. An aquifer acts as a groundwater reservoir when the underlying rock is impermeable. This may be tapped by wells for domestic, agricultural or industrial use. A serious environmental problem arises when the aquifer is contaminated by the seepage of sewage or toxins from waste dumps. If the groundwater in coastal areas is over-used salt water can seep into the aquifer; aquifer | |||
| ground-water storeys | |||
| water-bearing formation; water-bearing stratum | |||
| akvifer: 13 phrases, 2 sujets |
| Environnement | 1 |
| Sciences de la vie | 12 |