knick point

views updated Jun 27 2018

knick point(headcut) An abrupt change of gradient in the generally smooth long-profile of a stream, typically separating two concave-up segments. It is often attributed to a fall in base level: this, it is said, initiates a knick point which then slowly travels upstream. It may alternatively be owing to a change in rock type or load size, or to tributary entry.

knick point

views updated May 08 2018

knick point (headcut) Abrupt change of gradient in the generally smooth longprofile of a stream, and typically separating two concave-up segments. It is often attributed to a fall in base level: this, it is said, initiates a knick point which then slowly travels upstream. It may alternatively be due to a change in rock type or load size, or to tributary entry.