 This paper presents a novel approach for creating accurate digital terrain models, DTMs, of river channels and their floodplains. It combines mobile laser scanning and low-altitude unmanned aerial vehicle, UAV, photography-based methods to generate both a digital bathymetric model of the inundated river channel and a DTM of a point bar of a meandering subarctic river. The authors then evaluate the accuracy of the resulting DTMs by comparing them to terrestrial laser scans and combining them with an optical bathymetric model. Finally, they use the DTMs to calculate a DTM of difference which allows for a change detection of the meander bend over a one-year period. This study demonstrates the potential of using multiple sources of data to create highly detailed and accurate DTMs of river channels and their floodplains. This article was authored by Claude Flener, Maddy Vaja, Antonia Aquila, and others.