Watershed refers to the mountains or highlands that separate two adjacent river basins, from which rivers flow in two opposite directions. Watershed is the dividing line between adjacent watersheds, which is generally the connection line of the highest point of the watershed.
Where watersheds are formed: In nature, there are many watersheds, such as mountains and plateaus, but they can also be slightly undulating plains or lakes, and even some rivers become watersheds of two watersheds. The watershed line is the ridge line of the watersheds.