This document discusses watersheds and what defines a healthy watershed. It explains that a watershed is the area of land that drains to a body of water, such as a stream, lake, or river. A healthy watershed has intact natural land cover and vegetation that supports natural hydrologic and ecological processes. It also contains headwater streams and floodplains that provide clean water, fisheries, recreation, and benefits to wildlife and people. Factors like precipitation, infiltration, evaporation, storage, and human water use influence water flow within a watershed.