The USGS Water Science School
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If I asked you where the beginning of the edge of a bicycle wheel begins, you'd know that was a trick question. Technically, there is no beginning point of the water cycle - but you can still have an opinion about it, though. The table below lists the opinions of 61,140 people as to where they think the water cycle begins.
|Water-cycle component||Number of responses|
|Freshwater storage||1,118 (2%)|
|Groundwater discharge||1,126 (2%)|
|Groundwater storage||2,362 (4%)|
|Ice and snow||4,383 (7%)|
|Snowmelt runoff||1,083 (2%)|
|Surface runoff||2,423 (4%)|
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