Talk:Internal erosion
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Turbulent flow
[edit]The article needs to mention the critical role played by turbulent flow. Like where seepage daylights and goes from constrained to unconstrained, it introduces turbulence at the interface. From there headward erosion follows the flow upstream to its source: piping. Turbulence has the energy to remove and transport particles, laminar flow does not. If you find a sand boil, you sandbag up and around it, like making a chimney, until you get the water standing high enough over the boil to counter the opposing head to the point that it doesn't have the energy to support internal erosion. Keep adding sandbags, add more gravity head, until the sand "boiling" in the flowing water in the bottom of the sand boil stops boiling. On youtube, I recall seeing it as taking about two feet of sandbags, and the floodwater on the other side of the levee was ten feet higher than that. -- Paleorthid (talk) 21:49, 14 April 2022 (UTC)