Fig. 2: Changes in the submarine channel in Bute Inlet.
From: Rapidly-migrating and internally-generated knickpoints can control submarine channel evolution
a Map of changes in seabed elevation between March 2008 and October 2016, overlaying a seabed gradient map. Note the alternations of deposition and erosion along the channel. b-g Changes in seabed elevation at a series of cross-sections. Locations are shown in panel a. 10x vertical exaggeration. b The channel gradually fills except during knickpoint migration between 2010 and 2015, when previous deposits are eroded. c Lateral migration of channel thalweg as a result of knickpoint migration. Note how the channel floor in 2008-2010 becomes a terrace from 2015 onwards. d Section showing largest observed amount of outer-bend erosion away from migrating knickpoints. e Progressive filling of a channel in a depositional area. f Knickpoint migration creates a channel, where the channel was previously shallow and poorly-defined. g Cross section at a location affected by both outer-bend erosion and knickpoint migration.
