Here's why:
* Bedload refers to the sediment particles that are transported along the streambed by rolling, sliding, or hopping. This is in contrast to suspended load, which are finer particles carried within the water column, and dissolved load, which are minerals dissolved in the water.
* The movement of bedload is driven by the force of the flowing water, and the size and weight of the particles determine how they are transported. Larger, heavier particles tend to roll or slide, while smaller, lighter particles may hop or skip along the streambed.
Let me know if you'd like to learn more about the different types of sediment transport!