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Globally, more than one-third of the water used originates from underground. In the mid-latitude arid and semi-arid regions lacking sufficient surface water supply from rivers and reservoirs, groundwater is critical for sustaining global ecology and meeting societal needs of drinking water and food production.
A huge amount of water exists in the ground below your feet, and people all over the world make great use of it. But it is only found in usable quantities in certain places underground — aquifers. Read on to understand the concepts of aquifers and how water exists in the ground.
Gravity and pressure move water downward and sideways underground through spaces between rocks. Eventually it emerges back to the land surface, into rivers, and into the oceans to keep the water cycle going.
Water that has travelled down from the soil surface and collected in the spaces between sediments and the cracks within rock is called groundwater. Groundwater fills in all the empty spaces underground, in what is called the saturated zone, until it reaches an impenetrable layer of rock.
Groundwater is water that exists underground in saturated zones beneath the land surface. The upper surface of the saturated zone is called the water table. Contrary to popular belief, groundwater does not form underground rivers.
Groundwater is the water found underground in the cracks and spaces in soil, sand, and rock. It is held in aquifers— permeable water-bearing rock and/or sediment—and can be extracted through wells or bubbles up naturally through a spring or is discharged into lakes or streams.
Groundwater. Important Underground Sources Are Shrinking. 2 min read. Groundwater is the water that seeps into the earth and is stored in aquifers—areas of soil, sand, and rock that are capable...