What is a Watershed ?
The best way to think about a watershed is to imagine a funnel. The funnel can be any shape and any size, but the important idea is that the funnel concentrates everything toward one point. If you place a drop of water anywhere in that funnel it will slide down the walls and fall out through the spout. This is very much the way a watershed works. The walls of the funnel represent the sloping topography of the land within the watershed. The funnel's rim represents the highest points in the watershed from which all land slopes inward - a watershed's "rim" is called a divide. The spout represents the point to which all the water passing through the watershed is concentrated, like a river, lake, or in this case a creek. So, a watershed is the area of land over which all water travelling to the same body of water flows.