Mississippi river
Rio grande
The Mississippi-Missouri system.
Mississippi river
Amazon river system.
The world's largest river system is not the Nile. It is the Amazon River.
amazon river
The biggest river is the Nile river.
If by water system you mean a river system, then the Amazon River system of South America is the largest.
Mississippi
The Amazon River is called the "Ocean River" because we get about 20% of fresh water from there in the world!
Mississippi river