Because, drainage basins are high elevated
Because, drainage basins are high elevated
a drainage divide
True.
is mountains
A drainage basin is an extent or area of land where water from rain and melting snow or ice drains downhill into a body of water, such as a river, lake, reservoir, estuary, wetland, sea or ocean. A drainage divide is the line separating neighbouring drainage basins (catchments).
the main river and all of its tributaries are called a river system. The land drained by the river system is called a drainage basin. Drainage basins are separated by the high land in between, known as a divide or watershed.
Watershed
The location of the continental divide is determined by the topography of the land. It follows the high points or ridges where water naturally flows in different directions towards either the Atlantic or Pacific Ocean. This natural boundary helps define the direction of river systems and drainage basins on the continent.
water always flows from high level to low level. Also in drainage the principle is high level to low level....
Mountains are points of high elevation, or above sea level while basins have low elevations and are commonly below sea level.
I think you refer to the Watershed.... say rain falls on a mountain side & some of it eventually flows into the River Anything & some flows into the next valley, the River Zoobeedoobeedoo. Where the dividing line is, (Between the Anything & the Zoobeedoobeedoo) is the Watershed.
The high plateau between the coastal mountains and the Rockies is called the Intermountain Plateau. It stretches across portions of the western United States and comprises diverse landscapes such as deserts, basins, and mountain ranges.