Rhythmic spring
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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.
]] 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.
Notable rhythmic springs
Intermittent Spring in Wyoming, mentioned above, is the largest rhythmic spring in the world. Gihon Spring in the City of David in Jerusalem used to be a rhythmic spring before modern-time overpumping affected the level of the underground water table. It was of great historical, archaeological, and cultural importance because it is what made possible the human settlement in ancient Jerusalem. Pliny the Younger – who is famous for his accurate description of the Vesuvius eruption of AD 79 – also accurately described a rhythmic spring in the last letter of Book IV. This rhythmic spring is still acting to the same time scale today (Villa Pliniana spring in Como, Italy). In Ariège, France, the tributary of the Hers-Vif River is another example of an intermittent spring.
References
Ognjen Bonacci & Davor Bojanić, Rhythmic Karst Springs, Hydrological Sciences Journal, Feb 1991
Text derived from https://en.wikipedia.org/w/index.php?oldid=1367147662 under CC BY-SA 4.0; modifications have been made.