Over time, meanders become larger and more visible.Įventually meanders turn into oxbow lakes when two outside bends erode together making a shorter route for the water. The slower water drops sediment.Ĭontinuous erosion on the outer bank and deposition on the inner bank will expand the bend in the river. The river flows more slowly on the inside of the river beach. The river flows faster on the outside of a curve, and the fast water erodes the outside bends of a river channel by hydraulic action and abrasion. There are areas of slower and faster water movement. Meanders were named for a river in Anatolia.Ī river rarely flows in a straight line: it bends around because it drops sediment where it flows most slowly. The position of the curves changes over time. Meanders form a snake-like pattern as the river flows across a fairly flat valley floor. ( b) When incision is rapid, with mainly vertical erosion, the consequence is an ‘entrenched meander’.A meander is a curve in a river. The slope down which the stream has migrated during incision is called a ‘slip-off slope’. ( a) If incision is fairly slow, and sideways movement occurs, the result is an ‘ingrown meander’. An ‘incised meander’ results from downcutting, and two types are found.
The surface of a core may show ‘meander scrolls’, which are low, curved ridges of relatively coarse material lying parallel to the main channel and deposited by the stream. This widens out to form a bulbous feature, the ‘meander core’, around which the river swings. The migration of two adjacent, concave bands may narrow the floodplain between them, and the restriction is a ‘meander neck’. IT is also a great way to dissmiss random shit said by retards. A passage on a subtopic or digression in a. A portion, side trip, or episode in a longer journey. The process of sideways movement is known as ‘meander migration’ it involves the deposition of point bars on the inner sides of bends and erosion on the outer, and is limited to a tract of floodplain called the ‘meander belt’. Meander Definition Windings or convolutions, as of a stream. Over time, a meander may move laterally and/or vertically. Meander origin is uncertain, but the sinuous curve may be that shape best fitted for the transfer of channelled flow in accordance with the least work principle. outward extremities of curve) on two successive curves along the trace) is normally 10–14 times the channel width, irrespective of size. meander wave-length (the straight-line distance between two points at similar positions (e.g. The relationships between its geometric properties vary little with size: e.g.
It is best developed in cohesive floodplain alluvium.
Meander The sinuous trace of a stream channel whose length is normally equal to or greater than 1.5 times the down-valley (or straight-line) distance. (a)If incision is fairly slow, and sideways movement occurs, the result is an ‘ingrown meander’ the slope down which the stream has migrated during incision is called a ‘slip-off slope’.(b)When incision is rapid, with mainly vertical erosion, the consequence is an ‘entrenched meander’. An ‘incised meander’ results from down-cutting, and two types are found.
The migration of two adjacent, concave bands may narrow the flood-plain between them, and the restriction is a ‘meander neck’. The process of sideways movement is known as ‘meander migration’ it involves the deposition of point bars on the inner sides of bends and erosion on the outer, and is limited to a tract of flood-plain called the ‘meander belt’. Meander origin is uncertain, but the sinuous curve may be that shape best fitted for the transfer of channelled flow in accordance with the least-work principle. meander wavelength (the straight-line distance between two points at similar positions (e.g. It is best developed in cohesive flood-plain alluvium.
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