Meander development in a straight channel
A straight channel is formed in the Emriver model. Speed is x10. After flow begins, the channel slowly forms regular meanders and point bars. Note how the meanders tend to migrate in a downstream direction. The meander bends also expand the meander belt width until about 0:34, when they cease to move outward and migrate only in a downstream direction. Geomorphologists would argue that the channel reaches a point of stability then as sediment inputs to the reach match outputs and the reach no longer has net erosion. You can see this by observing sediment movement into versus out of the reach.
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Jul31 17
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https://serc.carleton.edu/download/files/19080/river_geomorphology_emr_21.v4.mp4
