Figure 4

(a) Sediment deposited in a channel-side water tank, 1 m above the channel bed; (b) coarse particles trapped in vegetation; (c) large concrete block transported into the centre of the channel from a wall >250 m away.
(a) Sediment deposited in a channel-side water tank, 1 m above the channel bed; (b) coarse particles trapped in vegetation; (c) large concrete block transported into the centre of the channel from a wall >250 m away.