I used an ArgGIS add-in extension called geomorphic change detection(GCD) to compare DEM dates between years, I used data from the Feshie River in Scotland to find examples of aggregation and degradation between 2004-2005 and 2005-2006
Key
Blue: Aggregation/channel bed rising
Green: Bar Development
Red: Bank Erosion
Orange: Bed lowering/incision
Depositional
Bar development; In the examples above that I identified as bar development(green) due to the shape, location in the channel and volume of material.
2005, located on what appears to be the outside bend with 1,014 m3 of +/- 202 m3 of material over 1,597 m2
2006, shows deposition that is adjacent to net erosional change, while the deposition isn't as significant the lower stream example in 2006 appears to be a point bar building on the outside of the river bend, and building the deposition from 04-05. In the upstream example the change appears to be in-stream and was located near the channel aggregation that showed in 2005
Aggregation; I identified two separate examples in 2005 from 2004 and understood aggregation as a small deposition per unit area. Over 4,014 m2 with 1,800 m3 +/- 414 m3, I interpreted this as not enough to sediment to form a bar but the wide cross-sectional indicate channel raising. Similar with the second example shown upstream of the larger area change, the net change was less significant
Erosional
Bank erosion(red) appeared to be any significant net erosional change over a small area, and has be located on the on the near the flood plane likely on the outside of a river bend in a meandering river.
2006, located downstream from deposition the bak erosion was 108.4 m3 +/- 40 m3 of lowering over 146 m2 and follows the streams outside channel
2005, locate opposite of net deposition and was a concentrated amount of erosion with a convex looking profile
Incision/bed lowering was a feature that showed in-stream erosion with less significance than bank erosion and no clear defining patter like bank erosion .
2005, after the river has a diffluence and the erosion extends into the main channel this could be where the fastest flow is navigating the boundary and becomes less significant as you look further downstream
2006, extending from the net change found in 2005 the incision could be widening at the boundary, it was a net change of 141 m3 +/- 36 over 389 m2