Which of the following is NOT a type of sediment transport by streams?

The correct answer is C, as overland flow refers to the movement of water across the land surface, rather than the transport of sediment within a stream. In the context of sediment transport, the other terms—dissolved load, suspended load, and bed load—specifically relate to how sediments are carried by flowing water in streams.

Dissolved load refers to the minerals and organic material that are dissolved in the water, which are carried in solution. Suspended load consists of fine particles and sediments that are held in suspension by the turbulence of the water, allowing them to travel long distances without settling. Bed load includes larger particles that roll, slide, or bounce along the bottom of the stream channel, being transported in direct contact with the streambed.

In contrast, overland flow describes a hydrological process that typically occurs during rainfall events when excess water runs off the surface rather than infiltrating the ground, and is not directly related to the sediment transport mechanisms present in flowing water bodies like streams and rivers.