A number from 1 to 6 or higher, ranked from headwaters to river terminus, that designates the relative position of a stream or stream segment in a drainage basin network. First-order streams have no discrete tributaries; the junction of two first-order streams produces a second-order stream; the junction of two second-order streams produces a third-order stream; etc.
Selected stream order links:
© 1997-2006 Healthboard.com.
Healthboard.com is a purely
informational website, and should not be used as a substitute
for professional legal, medical or technical advice.