What type of load consists of particles of clay and silt so fine they take a long time to settle in still water?

• A. Suspended load
• B. Dissolved load
• C. Bedload
• D. Streamflow

Answer: (A)

The type of load that consists of particles of clay and silt, which are so fine that they take a long time to settle in still water, is known as the suspended load. This term describes particles that remain suspended in the water column, carried along by the flow of the water rather than settling to the bottom.

The particles in the suspended load, such as clay and silt, are typically very small and lightweight, allowing them to stay afloat within the moving water due to turbulence and the mechanical action of flowing water. This suspension can lead to a murky appearance in bodies of water, as the fine particles scatter light.

In contrast, a dissolved load refers to materials that are completely dissolved in the water, making them invisible and unable to be categorized as particulate matter. Bedload consists of larger particles that roll or slide along the bottom of a waterway due to the force of the water, while streamflow generally describes the rate and motion of the water itself rather than the characteristics of the load being transported.