( ( A watershed ) ( ( is ( ( a ( distinct ( , ( topographically ( defined ( land area ) ) ) ) ) ) ( that ( drains ( into ( ( ( ( ( ( a ( single river ) ) , ) ( river system ) ) , ) or ) ( ( standing body ) ( of water ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN watershed)) (VP (VBZ is) (NP (NP (DT a) (JJ distinct) (, ,) (JJ topographically) (JJ defined) (NN land) (NN area)) (SBAR (WHNP (WDT that)) (S (VP (VBZ drains) (PP (IN into) (NP (NP (DT a) (JJ single) (NN river)) (, ,) (NP (NN river) (NN system)) (, ,) (CC or) (NP (NP (NN standing) (NN body)) (PP (IN of) (NP (NN water))))))))))) (. .)))
A watershed is a distinct, topographically defined land area that drains into a single river, river system, or standing body of water.
(ROOT (S (NP (NP (DT All)) (PP (IN of) (NP (NP (DT the) (NN land)) (VP (VBN drained) (PP (IN by) (NP (DT a) (NN river) (NN system))))))) (VP (VBZ is) (VP (VBN called) (NP (NP (PRP$ its) (NN basin)) (, ,) (CC or) (NP (DT the) (`` ``) (JJ wet) ('' '') (NN term) (NN watershed)))))))