( deposition ( ( occurs ( where ( ( the water ) ( slows down ) ) ) ) . ) )
(ROOT (S (NP (NN deposition)) (VP (VBZ occurs) (SBAR (WHADVP (WRB where)) (S (NP (DT the) (NN water)) (VP (VBZ slows) (PRT (RP down)))))) (. .)))
deposition occurs where the water slows down.
(ROOT (S (NP (NNP Deposition)) (VP (VBZ occurs) (SBAR (WHADVP (WRB where)) (S (NP (DT the) (NN water) (NN motion)) (VP (VBZ slows))))) (. .)))