Agua SubTerraneas

7/25/2019 Agua SubTerraneas

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Groundwater Hydrology What is Groundwater?

What is Groundwater Hydrology? The Geology of Groundwater

Groundwater Recharge

Aquifers

Groundwater Movement

Age of Groundwater

Locating and Mapping Groundwater

Drilling a Groundwater Well


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From Chapter 2


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Aquifers


Age of Groundwater




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What is Groundwater?

Found in the subsurface, inside pores within soil

and rock

Spelled either as two words, Ground Water, or as

one, Groundwater

Groundwater is the largest source of freshwater on

earth, and was little used until recently.

With electricity and the modern pump,

groundwater has become very important toagriculture, cities, and industries.

It is usually much cleaner than surface water.


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What is Groundwater?

.


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How much water is in a cubic kilometer (km3)?264,172,052,358 gallons. Thats enough water to supply a cityof about 1 million people with water for 30 years. The

problem is that we have 7 billion people on the planet. (Imagecredit: D. Lani Pascual, IUPUI / Earth Sciences)


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Figure 4.2 This map of major aquifers in the United States shows aninteresting distribution of groundwater formations.


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Aquifers


Age of Groundwater




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What is Groundwater Hydrology? It is the study of the characteristics, movement, and

occurrence of water found below the surface.

Groundwater and aquifers are like surface water

and watersheds

An aquifer is a geologic unit that transmits water.

Piezometric surfaces are used to map water levels,

similar to topographic lines on maps.

Each aquifer has its own piezometric surface.

The water level elevation in wells are used to create the

piezometric surface.


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Aquifers


Age of Groundwater




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The Geology of Groundwater

Sedimentary Rocks sandstone, shale, limestone, conglomerate

Glaciated Terrain

large valleys and basins were carved out sediments (sands, clays) were left behind

Alluvial Valleys and Fans

along rivers and streams

Tectonic Formations

solid rock is fractured by pressures due to earths

movement

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