Stream water balance, i.e. discharge and water level data, for 30 minutes and daily resolution for the Krycklan Catchment Study (Svartberget Research Station). The 68 km2 Krycklan catchment encompasses the natural mosaic of boreal landscapes consisting of forests, mires, streams and lakes that make up 70% of the area in Sweden, and which is representative of 30% of the world’s forest cover. Krycklan is an integral part of the Svartberget field research infrastructure, which belongs to the Swedish University of Agricultural Sciences (SLU).