because the river picks up speed so it is able to erode the bedload better so the river gets less and less bedload.
No, it can be affected by things such as the bedload of the river and the width.
1. Suspended2. Dissolved3. Bedload
River efficiency is how easily a river can move water, sediment and bedload.
M. A. Carson has written: 'Bedload transport in gravel channels'
Bedload decreases downstream due to the fact that the rocks and pebbles would be bumping into each other and breaking bits off (abrasion and attrition). Also, faster river velocities are capable of carrying greater amounts of bedload and transporting them farther and faster. The shape of the sediments of the bedload would therefore be exposed to more physical weathering which would progressively round the sediments and also decrease their size.
It is sediment transported by a river that becomes too heavy to be in suspension and thus sinks
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