 1. High-resolution topography, HRT, data sets are becoming increasingly available and improving our ability to monitor geomorphic changes through multi-temporal digital terrain models, DTMs. 2. The use of repeated topographic surveys enables us to infer the sediment dynamics of hazardous geomorphic processes such as floods, debris flows, and landslides, and allows us to derive important information on the risks often associated with these processes. 3. Topographic surveying platforms, georeferencing systems, and processing tools have seen important developments in the last two decades, particularly light detection and ranging, LADAR, technology used in airborne laser scanning, ALS, and terrestrial laser scanning, TLS. 4. HRT data. This article was authored by Saya Kukyaro, Eleonora Marset, Marco Cavalli, and others.