In order to serve societal needs for power supply, water provision, reductions in flood risk and increased river navigability, large dams are build in many parts of the world. Their reservoirs have been shown to have a big environmental impact due to their size and the conjoint environmental changes within a very short time of construction compared to usual turnover times in biogeosystems. Thus, these highly dynamic ecosystems undergo many environmental threats of which landslides, soil erosion and land use change are most prominent. In this session we invite researchers from different disciplines in geoscience to contribute new methodological approaches to monitor, analyse and forecast the behaviour of such ecosystems. Special emphasis will be paid to field investigations, landslide and soil erosion modelling, and remote sensing. Case studies are welcome as well.