A stream bed following a tilted valley. The maximum gradient is along the wörterbuch GeoTechnik/Dictionary Geotechnical Engineering PDF-valley axis represented by a hypothetical straight channel.
Författare: Helmut Herrmann.
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Meanders develop, which lengthen the course of the stream, decreasing the gradient. A meander is one of a series of regular sinuous curves, bends, loops, turns, or windings in the channel of a river, stream, or other watercourse. It is produced by a stream or river swinging from side to side as it flows across its floodplain or shifts its channel within a valley. The degree of meandering of the channel of a river, stream, or other watercourse is measured by its sinuosity.
The sinuosity of a watercourse is the ratio of the length of the channel to the straight line down-valley distance. Streams or rivers with a single channel and sinuosities of 1. 5 or more are defined as meandering streams or rivers. The Meander River is south of Izmir, east of the ancient Greek town of Miletus, now Milet, Turkey.
It flows through a graben in the Menderes Massif, but has a flood plain much wider than the meander zone in its lower reach. Its modern Turkish name is the Büyük Menderes River. When a fluid is introduced to an initially straight channel which then bends, the sidewalls induce a pressure gradient that causes the fluid to alter course and follow the bend. For a river to meander, secondary flow must dominate.