As sand builds up on one end of an island and in the tidal deltas, the angle of the channel can change quickly.
(sand; builds up; L:on one end of an island and in the tidal deltas) (the angle of the channel; can change quickly; T:As sand builds up on one end of an island and in the tidal deltas)
sand the angle of the channel
builds up can change quickly
L:on one end of an island and in the tidal deltas
T:As sand builds up on one end of an island and in the tidal deltas