Rhythmic spring

A rhythmic spring (also: ebb and flow spring, periodic spring, intermittent spring) is a cold water spring from which the flow of water either varies or starts and stops entirely, over a fairly regular time-scale of minutes or hours. Compared to continuously-flowing springs, rhythmic springs are uncommon, with the number worldwide estimated in 1991 to be around one hundred.

"Intermittent spring" redirects here. For the largest rhythmic spring in the world, located in Wyoming, see Intermittent Spring (Wyoming).
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