Answer
Settling velocity is the speed at which a particle falls through a fluid under the influence of gravity when the upward buoyancy force is equal to the downward gravitational force. The factors influencing settling velocity include the size, shape, and density of the particle, as well as the properties of the fluid through which it is falling. Settling velocity does not directly affect the dissolved load, as the dissolved particles are molecularly dispersed within the water and do not settle out like suspended or bed load particles. Instead, settling velocity applies primarily to the suspended and bed loads in a stream.
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