The Amazon is a river with many, many tributaries.
The Amazon River has the most tributaries, with around 1,100 tributaries.
There are over 1,100 tributaries that flow into the Amazon River. The three longest are the Madeira River(1), Purus River(2) and the Japur River(3).Madeira River
The Amazon river is extremely wide for most of its length, so the potential dam sites are located in its tributaries.
The Danube River has many tributaries. These include the Iller River, the Lech River, the Isar River, and the Enns River.
50 tributaries
Due to its great length, there are many tributaries of the Mississippi River. Five of these tributaries are the St. Croix River, the Missouri River, the Ohio River, the Rock River, and the White River.
There are many famous tributaries. Some of these include the Missouri River, the Ohio River, the Gila River, as well as the Little Colorado River.
the Seine river has 47 tributaries listed in the linked Wikipedia article.
It as at least one called Valley River.
tributary to the river Boyne in Ireland
The rivers Cherwell, Wey and Medway are the main tributaries of the Thames.