GEOLOGY

Detailed explanation-1: -Ridges and hills that separate two watersheds are called the drainage divide.

Detailed explanation-2: -A watershed starts at the highest points on the landscape, like mountain peaks and ridgelines that divide one valley or drainage from another. The imaginary line that connects those high points is called the watershed divide.

Detailed explanation-3: -Watershed Divide-a line dividing land whose drainage flows toward the given stream from land whose drainage flows away from that stream. Watershed-is an area of land that drains water to a common outlet.

Detailed explanation-4: -The boundary of a watershed is defined by the highest elevations surrounding a lake or river segment. A drop of water falling outside of the boundary will drain to another watershed.

Detailed explanation-5: -The boundary between drainage basins is a drainage divide: all the precipitation on opposite sides of a drainage divide will flow into different drainage basins. A drainage basin provides a limited surface area within which physical processes pertinent to the general hydrology may be considered.