How does a river change course?

Answer 1

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Since this post has such an idiotic answer, I'll explain it. During flooding the force of the current cuts across narrow bends, making the river shift to the new channel. Sometimes obstructions in a river will cause the current to divert and cut a new channel in a different direction around the obstruction. Rivers have also been know to change course because of earthquakes, as did the Mississippi River in 1811 (New Madrid earthquake).

Answer 2

Of course rivers can change course. Rivers more likely change course if for some reason it overflows and adds a small run-off creek. If there is something in a rivers way that's not allowing it ti flow it will very likely vere off course.

Answer 3

The strenght of the river flow isnot the same throughout the stream, one of the banks is affected more, than the other, so it erodes quicker. The other bank, in turn, erodes slower and even is "thickened" with the sand that comes from the other bank. The erosion of the banks is also influenced by the "base" of the river. Rocks erode slower, while sand and soil erodes quite quickly.

Answer 4

Rivers change course because of obstacles and erosion. Rivers change in depth as a result of rain or floods, or droughts, along with depth of sediments being moved or that remain stagnate.