Areas considered as affected by hydropower (small and large) are those areas occupied by the hydraulic works and infrastructure, typically including the hydropower plants, intakes, outlet structures, penstocks (if not buried), access roads and cleared forest. Also the parts of the watercourses with changed flows, i.e. from the intake in the upper end to the point where the water is released back to the river, are also defined as ‘occupied land’. A subjective assessment classified roads as built for the energy project or not. For large-scale hydropower plants, the reservoir areas were defined as occupied land and polygons were drawn around the reservoirs at maximum water level.