![]() The slope of the bed is still flatter and ranges from 1 in 1000 to 1 in 2000. It forms new land by depositing its excess load during the flood season. This stage of river is also known as river in flood plain or alluvial river because in this region. Thus shifting braided and interlaced channels are formed in the river course. The water flows round the heaps and the river flow is bifurcated. Rivers in this stage have straighter courses with wide bed and non-submersible banks.ĭuring flood period the coarse material comes in the river channel together with the high velocity flow and when the flood subsides these heavy and material piles up in heaps. ![]() As the bed material is very pervious there exists good amount of subsoil water flow. In some schemes, "meandering" applies only to rivers with exaggerated circular loops or secondary meanders that is, meanders on meanders.In this stage the bed is made up of a mixture of sand, shingle, gravel and boulders. Unless otherwise defined in a specific scheme "meandering" and "sinuosity" here are synonymous and mean any repetitious pattern of bends, or waveforms. Parameters based on mathematical formulae or numerical data vary as well, depending on the database used by the theorist. There is not yet full consistency or standardization of scientific terminology used to describe watercourses. Over time meanders migrate downstream, sometimes in such a short time as to create civil engineering problems for local municipalities attempting to maintain stable roads and bridges. When a meander gets cut off from the main stream, an oxbow lake is formed. The result is a snaking pattern as the stream meanders back and forth across its down-valley axis. A stream of any volume may assume a meandering course, alternately eroding sediments from the outside of a bend and depositing them on the inside. A meander is formed when the moving water in a stream erodes the outer banks and widens its valley and the inner part of the river has less energy and deposits what it is carrying. Streams or rivers with a single channel and sinuosities of 1.5 or more are defined as meandering streams or rivers.įreebase Rate this definition: 0.0 / 0 votesĪ meander, in general, is a bend in a sinuous watercourse or river. The sinuosity of a watercourse is the ratio of the length of the channel to the straight line down-valley distance. Over time, meanders migrate downstream, sometimes in such a short time as to create civil engineering challenges for local municipalities attempting to maintain stable roads and bridges.The degree of meandering of the channel of a river, stream, or other watercourse is measured by its sinuosity. It typically ranges from 15 to 18 times the width of the channel. The result of this coupled erosion and sedimentation is the formation of a sinuous course as the channel migrates back and forth across the axis of a floodplain.The zone within which a meandering stream periodically shifts its channel is known as a meander belt. It is produced as a watercourse erodes the sediments of an outer, concave bank (cut bank) and deposits sediments on an inner, convex bank which is typically a point bar. ![]() Wikipedia Rate this definition: 0.0 / 0 votesĪ meander is one of a series of regular sinuous curves in the channel of a river or other watercourse.
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