The developed HYPE model, Hydrological Predictions for the Environment, has been set-up and applied to all of Sweden, S-HYPE. The model has recently been upgraded and provides daily simulations of discharge and concentrations of nitrogen and phosphorous, for 37 787 subbasins defined in the Swedish Water ARchive (SVAR) version 2010:2.
Modelled data, from 1990 - 2011, can be downladed from SMHI Vattenweb.
Model Estimated time series of freshwater include water flow and water quality, both locally and in total, see table below. Data apply to the discharge point in the selected sub-basin. The local calculations describing the contribution from the local sub-basin, while the overall estimates include contributions from all possible sub-basins upstream of the selected area.
The typical error of the discharge projections are about ± 10%, the nitrogen concentration of about ± 20%, and phosphorus concentrations, about ± 30%, calculated on a long term average and compared to the observations. When it comes down to individual daily values increases the errors and the same goes when you get down to small areas.
The model's parameters in the HYPE is linked to soil type and land use, and not adapted locally. National databases have been used to set up the model. Better local results are obtained by using local information.
S-HYPE will be further developed to gradually improve the quality of the model calculations.