Water Cycle and Distribution of Water

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Water cycle

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Continuous process by which water moves from Earth's surface to the atmosphere and back.

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Salt Water Distribution

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97% of Earth's water is salt water, found in oceans.

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Artesian Well

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A well where water rises naturally due to pressure within an aquifer, occurring when groundwater is trapped between two impermeable layers.

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Permeable Materials

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Materials like sand and gravel that allow water passage.

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Impermeable Materials

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Materials like clay and granite that block water.

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Well Drilling

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Must be drilled below the water table; can be traditional (hand-dug) or modern (machine-drilled).

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Pumping Effects

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Pumping can lower the local water table.

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Underground Water System

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Crucial for providing water resources to millions of people, originating from precipitation and moving through permeable materials.

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Point source

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Specific, identifiable source of pollution

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Nonpoint source

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Widely spread pollution source without specific origin point