Prentice Hall EARTH SCIENCE

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Prentice Hall EARTH SCIENCE

• Tarbuck Lutgens

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Chapter 6
Running Water and Groundwater
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6.1 Running Water
? Water constantly moves among the oceans, the
atmosphere, the solid Earth, and the biosphere.
This unending circulation of Earths water supply
is the water cycle.
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6.1 Running Water
? Processes involved in the cycle are
precipitation
evaporation
infiltrationthe movement of surface water
into rock or soil through cracks and pore spaces
runoff
transpirationthe release of water into the
atmosphere from plants through the ground
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6.1 Running Water
? Balance in the water cycle means the average
annual precipitation over Earth equals the amount
of water that evaporates.
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Distribution of Earths Water
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The Water Cycle
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The Water Cycle
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Variables Effecting Runoff
? Vegetation slows the runoff of the land.
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Variables Effecting Runoff
? Large amounts of precipitation overwhelm the
ability of land to absorb water.
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Variables Effecting Runoff
? Large amounts of precipitation overwhelm the
ability of land to absorb water.
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Variables Effecting Runoff
? Large amounts of precipitation overwhelm the
ability of land to absorb water.
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Variables Effecting Runoff
? Compacted soil will not absorb water.
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Variables Effecting Runoff

• Porosity and permiability of soil.
• Porosity is how MUCH soil can absorb
• Permiability is how FAST soil can absorb it.