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| - During the river's lowland course, lateral erosion becomes more important than vertical erosion since it's got too close to sea level. Therefore, as a result of lateral erosion, the sides of the river channel is eroded,. The force of the river water undercuts the bank on the outside of a bend to form a river cliff. An underwater current which carries the eroded materials, is deposited to form a gentle bank called a slip-off slope. Image:Fish1.gif This article is a , and is very fishy. You can help My English Wiki by expanding it, removing the non-GCSE content or improving it.
- A meander, in general, is a bend in a sinuous watercourse or river. 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. 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. The result is a snaking pattern as the stream meanders back and forth across its down-valley axis. When a meander gets cut off from the main stream, an oxbow lake is formed. 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.
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| abstract
| - A meander, in general, is a bend in a sinuous watercourse or river. 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. 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. The result is a snaking pattern as the stream meanders back and forth across its down-valley axis. When a meander gets cut off from the main stream, an oxbow lake is formed. 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. There is not yet full consistency or standardization of scientific terminology used to describe watercourses. A variety of symbols and schemes exist. Parameters based on mathematical formulae or numerical data vary as well, depending on the database used by the theorist. Unless otherwise defined in a specific scheme "meandering" and "sinuosity" here are synonymous and mean any repetitious pattern of bends, or waveforms. In some schemes, "meandering" applies only to rivers with exaggerated circular loops or secondary meanders; that is, meanders on meanders. Sinuosity is one of the channel types that a stream may assume over all or part of its course. All streams are sinuous at some time in their geologic history over some part of their length.
- During the river's lowland course, lateral erosion becomes more important than vertical erosion since it's got too close to sea level. Therefore, as a result of lateral erosion, the sides of the river channel is eroded,. The force of the river water undercuts the bank on the outside of a bend to form a river cliff. An underwater current which carries the eroded materials, is deposited to form a gentle bank called a slip-off slope. As lateral erosion continues, the bend of the meander becomes even more pronounced. Especially in times of flood, when the river's energy is much greater, the narrow neck of the meander may be breached so that the river flows straight again. The redundant meaner loop retains some water, forming a crescent-shaped ox-bow lake. Deposition during the flood helps to seal off edges and ends of the lake. Image:Fish1.gif This article is a , and is very fishy. You can help My English Wiki by expanding it, removing the non-GCSE content or improving it.
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