| Volumes and Issues Contents of Issue 6 |
www.hydrol-earth-syst-sci.net/8/1153/2004/
© Author(s) 2004. This work is licensed
under a Creative Commons License.
Comparison of four models simulating phosphorus dynamics in Lake Vänern, Sweden
1Department of Chemical Engineering, Karlstad University, SE-651 88 Karlstad, Sweden
2Swedish Meteorological and Hydrological Institute, SE-601 76 Norrköping, Sweden
Abstract. This paper compares four water quality models applied to Lake Vänern, Sweden. The comparison is focused on phosphorus, the primary limiting nutrient in Lake Vänern. Two of the models, FYRISÅ and HBVNP, are simple and were developed as parts of catchment models. Two other models, called LEEDS and BIOLA, are more comprehensive lake models. The models were calibrated using data from the period 1985–1992 and validated using data from the period 1993–2000. The fit to calibration data is similar for the FYRISÅ, HBVNP, and LEEDS models, and slightly worse for the BIOLA model. All models fit the validation data almost as well as the calibration data. The models’ behaviour was tested in two representative scenarios. An increase of emissions by 40% from a pulp and paper mill has a negligible effect on the water quality, while a decrease in phosphorus load by 14% (accomplished by better waste-water treatment in rural households) gives a considerable decrease in phosphorus concentration in the lake. Still, the results of the scenarios vary between the models.
Keywords: lake, phosphorus, model, scenarios, simulation
Final Revised Paper (PDF, 746 KB)
Citation: Dahl, M. and Pers, B. C.: Comparison of four models simulating phosphorus dynamics in Lake Vänern, Sweden, Hydrol. Earth Syst. Sci., 8, 1153-1163, 2004. Bibtex EndNote Reference Manager
