In my study I investigate the immediate effects of restoration on the emissions and sinks of greenhouse gases (GHG), methane (CH4) and carbon dioxide (CO2) in a nutrient-rich forestry-drained peatland. The continuous GHG-flux data, measured with eddy covariance- technique, starting more than one year before, and continuing long after the restoration, will be unique. Together with other data, it will reveal more about the changes happening in the carbon cycle during the restoration in the soil and in the whole ecosystem-level. From the peat samples I will investigate how the restoration affects CH4 production and oxidation potential in the soil. In addition, the goal is to improve HIMMELI-methane model, to better predict GHG-fluxes from drained and restored peatlands.