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As the river erodes farther into the cutbank (the outside of the bend) the bend migrates in the direction of erosion. This migration leaves behind point bar deposits on the inside of the bend, where velocities are low enough to allow deposition of point bar sediments.

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Q: How does erosion happen at river bends?
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Do river turn wider when it goes to the downstream?

Yes it does, one of the reasons is erosion. Hydraulic action and corrosion erode the bends of the river making the outside bend wider. :P


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