( ( Changing ( a ( stream channel ) ) ) ( ( can ( ( cause ( ( flooding and ) erosion ) ) ( along ( the ( stream banks ) ) ) ) ) . ) )
(ROOT (S (S (VP (VBG Changing) (NP (DT a) (NN stream) (NN channel)))) (VP (MD can) (VP (VB cause) (NP (NN flooding) (CC and) (NN erosion)) (PP (IN along) (NP (DT the) (NN stream) (NNS banks))))) (. .)))
Changing a stream channel can cause flooding and erosion along the stream banks.
(ROOT (S (NP (DT A) (NN stream) (NN flooding)) (VP (VBZ is) (ADVP (RBS most) (RB likely)) (VP (VBN caused) (PP (IN by) (NP (DT a) (NN thunderstorm))))) (. .)))