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III. Section 3 Water Underground

III. Section 3 Water Underground. A. Underground Layers. Water comes from precipitation Water underground trickles down between particles of soil and through cracks and spaces in layers of rocks Pores- size of space between particles of soil

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III. Section 3 Water Underground

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  1. III. Section 3 Water Underground

  2. A. Underground Layers • Water comes from precipitation • Water underground trickles down between particles of soil and through cracks and spaces in layers of rocks • Pores- size of space between particles of soil • Permeable- materials that allow water to move easily (sand, gravel) • Impermeable- materials water cannot pass through

  3. A. Underground Layers 6. Saturated zone- the area of totally filled with water 7. Water table- top of saturated zone 8. Unsaturated zone- layer of rocks that is above water table

  4. B. Aquifers • An under ground layer of rock or sediment that holds water • Vary in size • Water is in constant motion

  5. C. Bringing Groundwater to the Surface • Springs- where the water table meets the the ground surface and flows out • Wells- can drill a well below the water table • Today pumps bring water to the surface- not buckets • Recharge- new water the enters the aquifer from the surface- this happens if well is drained • Artesian Well- a well in which water rises because of pressure within aquifer

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