Adding more tributaries into river can change the physical characteristics of the river.
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Explanation:</u>
Tributary is the freshwater stream that falls into mainstream or river.
It is usually made up of cold water as a result of snowmelt. When many tributaries enter into a river, they can change the temperature of the river water instantly.
Each tributary brings sediments of its own area so when these enter into a river, they make water nutrient-rich.
Adding more tributaries can also impact mainstream discharge.
