Abstract
This report summarizes the hydrological modelling for environmental applications for the mainland of Norway in the HydroCen work package 3.5. Also incorporated in the report are the findings and results of two master theses: water balances of lakes (chapter 2.8) and time-step testing with different precipi-tation products (chapter 2.7). The model and scripts for creating new set-ups, pre- and postprocessing are available on Git-hub*. The precipitation-runoff model HYPE produces relevant hydrological output for the Norwegian mainland. In the HydroCen work package 3.5 study HYPE was set-up with a spatially distributed flow network in-cluding lakes and reservoirs. Water management model modules, water temperature, lake water level, and hourly time steps were tested and evaluated. A single-step calibration approach showed good accuracy with an average KGE (Kling Gupta Efficiency) of 0.56. Predictions in ungauged basins showed promising results. The current model set-up can be used for hindcasting of natural flow conditions and impacts of hydro-power systems on hydrological regimes. It can also be used as a base model for further regional studies. Furthermore, it has potential for future applications for nutrient modelling, climate change impacts, and distributed water temperature modelling.