Who came up with the watershed?

The concept of a watershed, referring to an area of land where all the water drains into a common body, has been utilized in various forms by different cultures for centuries. However, the modern scientific understanding of watersheds emerged in the 19th century through the work of hydrologists and geographers. Notably, the term "watershed" in the context of environmental science gained prominence through the contributions of researchers like John Wesley Powell, who studied river systems and their management in the late 1800s.