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I'm under the impression you're not asking why a meandering river will keep meandering, but why even a straight river will start to meander in the first place. The first is indeed by erosion of the outside of the bends, and deposition on the inside of the bend, which is fairly easy to understand. On the origin of meanders, this is a more complicated matter. ...


Meanders amplify themselves--the stream tends to erode on the outside of the meander (forming a cut bank) and deposit sediment on the inside (forming a point bar). Eventually, the meander will propagate so far from the stream's mean path that the stream cuts across it. Eventually, the old meander will turn into an oxbow lake and fill in. As to why it ...


I'm gonna hazard a guess here: They can't. While I don't have any evidence for this claim, it seems likely that there are too many small-scale non-linear processes feeding in to the overall generation process to ever be able to sensibly derive any kind of analytical solution based on physical first-principles. I think that's what you're asking. So, ...


Straight rivers usually occurs on igneous or metamorphic rocks and rugged relief. Meanders rivers usually occurs in plain surfaces . Plain surfaces usually are covered by sedimentary rocks or sediments (easiest to erode). In a curve, the water is stronger in the open side and tends to erode, in the other margin it tends to accumulate sediment.

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