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Why does river sediment beome rounder downstream?

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The bedload size generally decreases and the bedload shape becomes more rounded due to erosion happening during transportation. The large angular rocks are formed by hydraulic action and undercutting. Then large, angular rocks travel by traction and are eroded by attrition in the upper course making them smaller and rounder. Then these smaller, rounder rocks travel in suspension and are eroded by corrasion in the middle and lower course.
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The bedload size generally decreases and the bedload shape becomes more rounded due to erosion happening during transportation. The large angular rocks are formed by hydraulic action and undercutting. Then large, angular rocks travel by traction and are eroded by attrition in the upper course making them smaller and rounder. Then these smaller, rounder rocks travel in suspension and are eroded by corrasion in the middle and lower course.
Report (0) (0) | earlier