What is a Watershed?
A watershed is the area of land drained by a river, stream, or other body of water. If rain or snowmelt is not intercepted by vegetation or does not infiltrate into the soil, it may flow over the
land to a low spot in the landscape, often a body of water or wetland. The land area above a given point on a waterbody (river, stream, lake, wetland) that contributes overland flow or surface runoff to that point is considered the watershed.