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Tisa River Basin Hydrologic Data Collection Program

Zakarpattia Oblast, Ukraine

Diagram of the water cycle.

The Water Cycle

By John M. Evans USGS, Colorado District
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The water cycle, also called the hydrologic cycle, is the cycle by which water continuously circulates from the Earth to the atmosphere and back to the Earth.  Many processes, including evaporation, condensation, transpiration, precipitation, and runoff, are involved in the hydrologic cycle.

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