Examples of the possessive form of plural nouns: actors - the actors' dressing rooms. bottles - the bottles' labels. children - the children's playground. doctors - the doctors' offices. eggs - the eggs' carton. friends - my friends' names. geese - the geese's pen.
This covered pool is really a good example of a watershed. The blue cover represents the watershed, the area in which precipitation that falls flows down-gradient towards the lowest part of the basin, the center of the pool cover in this case. Likewise, in nature, water flows towards a valley, river, or lake.
This type of water is referred to as runoff, because it is water that falls on the ground and flows across the surface until it hits a stream. Each waterway has a drainage basin, or watershed, which is an area of land where all precipitation that falls will drain or flow downhill into a specific stream.Based on where rain falls, and in what drainage basin, determines what waterway it will end up traveling to.he drainage basin of a larger river system is comprised of many branching networks. It starts at high elevation with first-order streams, which are small streams that originate from springs. First-order streams are where the system begins, and they do not have any other streams flowing into them.