( ( ( ( ( The summation ) ( of ( ( ( the movement ) ( of water ) ) ( ( into and ) out ) ) ) ) ( of ( a ( groundwater reservoir ) ) ) ) ( during ( ( a ( specified period ) ) ( of time ) ) ) ) . )
(ROOT (NP (NP (DT The) (NN summation)) (PP (IN of) (NP (NP (DT the) (NN movement)) (PP (IN of) (NP (NN water))) (UCP (PP (IN into)) (CC and) (ADVP (RB out))))) (PP (IN of) (NP (DT a) (NN groundwater) (NN reservoir))) (PP (IN during) (NP (NP (DT a) (VBN specified) (NN period)) (PP (IN of) (NP (NN time))))) (. .)))
The summation of the movement of water into and out of a groundwater reservoir during a specified period of time.
(ROOT (S (NP (DT A) (NN reservoir)) (VP (VBZ is) (NP (NP (NN part)) (PP (IN of) (NP (NP (DT a) (NN cycle)) (SBAR (WHNP (WDT that)) (S (VP (VBZ holds) (NP (NP (DT an) (NN element) (CC or) (NN water)) (PP (IN for) (NP (NP (DT a) (JJ long) (NN period)) (PP (IN of) (NP (NN time))))))))))))) (. .)))