Stream head cut
an erosional feature of some intermittent and perennial streams with an abrupt vertical drop, also known as a knickpoint, in the stream bed
In geomorphology, a stream head cut or simply head cut (alternately headcut) is an erosional feature of some intermittent and perennial streams. Headcuts and headward erosion are hallmarks of unstable expanding drainage features such as actively eroding gullies. Headcuts are a type of knickpoint that, as the name indicates, occur at the head (upstream extent) of a channel.
The knickpoint, where a head cut begins, can be as small as an overly-steep riffle zone or as a large as a waterfall. When it is not flowing, the head cut will resemble a very short cliff or bluff. A small plunge pool may be present at the base of the head cut due to the high energy of falling water. As erosion of the knickpoint and the streambed continues, the head cut will migrate upstream.
Groundwater seeps and springs are sometimes found along the face, sides, or base of a head cut.
Channel incision is very common when head cuts are involved in stream morphology. In terms of stream restoration, head cuts are one of the most difficult challenges.
This brief starts where responsible research should: with the source description of “Stream head cut” as an erosional feature of some intermittent and perennial streams with an abrupt vertical drop, also known as a knickpoint, in the stream bed. Everything that follows is an evidence route, not borrowed authority.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Feb 23, 2026. The linked authority identifier is Q5689130. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Stream head cut” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.