Subsurface Water Presentation

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SUBSURFACE

WATER

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Subsurface water

Subsurface water, , or

or ground water

ground water, is the

, is the

water that lies beneath the ground

surface, filling the pore space between

grains in bodies of sediment and clastic

sedimentary rock, and filling cracks and

crevices in all types of rock.

-It is also the water that is flowing

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Source of ground water is rain and snow that falls to the

ground a portion of which percolates down into the

ground to become ground water, where it eventually

makes it way back to surface streams, lakes, or rivers.

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

Groundwater makes up about 1% of

the water on the Earth (most water is

in ocean).



But, groundwater makes up about 35

times the amount of water in lakes

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Distribution of Water

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

Groundwater occurs everywhere beneath

the

Earth’s

_{surface but is usually}

restricted to depths less that about 750

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

Groundwater is recharged from, and eventually

flows to, the surface naturally; natural discharge

often occurs at springs and seeps, and can

form oases or wetlands.

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Occurrence of Ground Water

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Subsurface Zones



Zone of Aeration, or the

Vadose Zone

-a subsurface zone in which

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Water Table

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Water table follows the topography but

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Moisture in the Vadose Zone

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