Spring (hydrology)

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On an average day nearly 303 million US gallons (1,150,000 m3) o watter issue frae Big Spring in Missouri at a rate o 469 cubic feet per second (13.3 m3/s).

A spring is a component o the hydrosphere. Specifically, it is ony naitural situation whaur watter flows tae the surface o the yird frae unnergrund. Thus, a spring is a steid whaur the aquifer surface meets the grund surface.