River Geomorphology (15) - Meander Development in a Straight Channel

Описание: This clip has no audio. Download the teaching guide at
http://emriver.com/documents/2018/01/...

A straight channel is formed in the Emriver model (video 25 shows part of the process by which this was done). 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.
Other clips in the series use this clip to compare real-world remeandering reaches with those seen in the Emriver model, including video 4.

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