Transportation
is to provide water and transportation for many people
It acts as a water pipeline via the Colorado river. It provide recreational opportunity,
If by water system you mean a river system, then the Amazon River system of South America is the largest.
Probably a Pacific Ocean desalination system to provide San Diego with the water it needs to survive.
provide water for China
=The Amazon River=
Because it is the land area that supplies water to a river system :)
Because it is the land area that supplies water to a river system :)
they both help provide food water and wood
The Savanna's have several rivers that provide water sources. Some of these rivers are, Queensland river, Mitchell river, and the Gregory river.
This is the 'river catchment'.
The Colorado River.