The dividing line between two adjacent river systems, such as a ridge.
An area of land where all rainwater and melting snow naturally moves to the same body of water.
a line that divides two adjacent river systems
an event marking a unique or important historical change of course or one on which important developments depend; "the agreement was a watershed in the history of both nations"
a ridge of land that separates two adjacent river systems
an event marking a unique or important historical change of course or one on which important developments depend
the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet
