Different rivers travel at different speed depending on the inclination of the slope down which they’re flowing, the amount of material they’re transporting, the nature of that material (lightweight silt or heavy rocks and boulders) and the amount of rainfall the river receives. No two rivers are the same.
I think it depends on the size and mouth of the river… Rivers are very philosophical to me, even a question including their name makes me happy, although I don’t really have an answer 🙂
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