The boundary of the drainage basin is called a drainage divide. Sometimes drainage basin is called catchment area referring to an area where water flows into a stream or a number of streams. In North America drainage basin is also called Watershed.
I checked the web for this next answer, and it says the Amazon River is the longest river/drainage basin in the world. I hope that helped! :)
The major drainage basin of South America is the Amazon River. The river has a total basin area of 5,883,400 square kilometers.
Drainage basin is also called catchment, catchment area, catchment basin, drainage area, river basin, and water basin. It is an area of land. All water that falls on that land flows into one river.
The largest known river basin in the United States is the Mississippi
The Amazon with a drainage basin of 2,270,000 square miles.
Atlanitc
Amazon River
It has the largest drainage basin in the world. The longest is the Nile.
What is the largest drainage basin in the US?
that is what is called a basin
drainage basin