Tributary inputs are not a primary factor influencing riverbed morphology. The primary factors are channel slope, sediment supply, and bank vegetation.

The longitudinal profile of a river typically exhibits a concave upward pattern, indicating a decrease in channel slope with increasing distance from the source.

Grain size is the most influential sediment property in determining the mode of sediment transport. Larger grains are typically transported by bedload, while smaller grains are transported by suspended load.

Erosion is the process by which sediment is picked up and entrained into the flow. Transportation is the process by which sediment is moved downstream, deposition is the process by which sediment is dropped out of the flow, and sediment sorting is the process by which sediment is separated into different size fractions.

Meanders are not a type of bedform. They are sinuous bends in the river channel.

Deposition is the process by which sediment is dropped out of the flow. Erosion is the process by which sediment is picked up and entrained into the flow, transportation is the process by which sediment is moved downstream, and sediment sorting is the process by which sediment is separated into different size fractions.

Sediment sorting is the process by which sediment is separated into different size fractions. Erosion is the process by which sediment is picked up and entrained into the flow, transportation is the process by which sediment is moved downstream, and deposition is the process by which sediment is dropped out of the flow.

Dissolved load is not a type of sediment transport. It refers to the transport of dissolved ions in the water.

The size of sediment particles that are transported as bedload is typically between 2 mm and 64 mm.

The size of sediment particles that are transported as suspended load is typically less than 0.062 mm.

The size of sediment particles that are transported as wash load is typically less than 0.062 mm.

Grain size is not a factor that influences the competence of a stream. The competence of a stream is determined by the channel slope, water discharge, and sediment supply.

Grain size is not a factor that influences the capacity of a stream. The capacity of a stream is determined by the channel width, water depth, and channel slope.

Anastomosing is not a type of river channel pattern. It refers to a network of interconnected channels.

Bedrock is not a type of riverbed material. It refers to the solid rock underlying the riverbed.