There are some Matlab tools you can use for river bank migration based on timescale historical image for the interesting area. One of them is called Planform Statistics Toolbox that you can find in the following paper : Timescale dependence in river channel migration measurements.
Check the Figure 2 in the mentioned paper to guide you to another paper by Lauer 2007 for more information about this tool.
I mentioned Rivermorph software, but if you are not aware of David Rosgen and his works at www.wildlandhydrology.com it would probably be worth looking into. Probably since a couple of decades ago, Rivermorph and Rosgen have been collaborating. Most of the Rosgen approach relies on and uses field data collection. If you are only using remote sensing, obtaining LIDAR coverage would help. If water is clear enough, green LIDAR can help with channel depth estimates, as the LIDAR pulses are absorbed by water. Probably obtaining the past aerial photos will help greatly. I have seen examples of presentations which combined the aerial photos to help display how the meanders changed with time.