( ( ( A watershed ) ( -LRB- ( ( also ( called ( ( ( a ( drainage basin ) ) or ) ( a catchment ) ) ) ) -RRB- ) ) ) ( ( is ( defined ( as ( ( ( an area ) ( of land ) ) ( that ( ( ( ( intercepts and ) drains ) precipitation ) ( through ( ( a ( particular ( river ( ( system or ) group ) ) ) ) ( of ( river systems ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT A) (NN watershed)) (PRN (-LRB- -LRB-) (VP (ADVP (RB also)) (VBN called) (NP (NP (DT a) (JJ drainage) (NN basin)) (CC or) (NP (DT a) (NN catchment)))) (-RRB- -RRB-))) (VP (VBZ is) (VP (VBN defined) (PP (IN as) (NP (NP (DT an) (NN area)) (PP (IN of) (NP (NN land))) (SBAR (WHNP (WDT that)) (S (VP (VBZ intercepts) (CC and) (VBZ drains) (NP (NN precipitation)) (PP (IN through) (NP (NP (DT a) (JJ particular) (NN river) (NN system) (CC or) (NN group)) (PP (IN of) (NP (NN river) (NNS systems)))))))))))) (. .)))
A watershed (also called a drainage basin or a catchment) is defined as an area of land that intercepts and drains precipitation through a particular river system or group of river systems.
(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)))))))