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| groundwater | |||
| sub-surface water; subterranean water; underground water | |||
| groundwater Water that occupies pores and crevices in rock and soil, below the surface and above a layer of impermeable material. It is free to move gravitationally, either downwards towards the impermeable layer or by following a gradient | |||
| ground water; ground water layer | |||
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| soil water Water stored in soils; soil water | |||
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