( ( surface ( water ( and ( groundwater hydrology ) ) ) ) ; )
(ROOT (NP (NP (NN surface) (NN water) (CC and) (NN groundwater) (NN hydrology)) (: ;)))
surface water and groundwater hydrology;
(ROOT (S (SBAR (WHADVP (WRB When)) (S (S (NP (DT the) (NN ground)) (VP (VBZ absorbs) (NP (DT the) (NN water)))) (CC and) (S (NP (PRP it)) (VP (VBZ settles) (PP (IN below) (NP (DT the) (NN surface))))))) (NP (PRP it)) (VP (VBZ is) (VP (VBN called) (NP (NN groundwater)))) (. .)))