A watershed is an independent spatial unit formed by natural precipitation that has a watershed as its boundary and rivers,lakes,and other bodies of water as its links.Within a watershed,natural,economic,and social factors are closely interconnected,forming a complex sy...MORE A watershed is an independent spatial unit formed by natural precipitation that has a watershed as its boundary and rivers,lakes,and other bodies of water as its links.Within a watershed,natural,economic,and social factors are closely interconnected,forming a complex system.Watershed governance requires starting from the...