Adding more tributaries to a local river basin can have what effect?

Adding more tributaries into river can change the physical characteristics of the river.

Explanation:

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.