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Comparison of Four Models Simulating Phosphorus Dynamics in Lake Vänern, Sweden : Volume 8, Issue 6 (30/11/-0001)

By Dahl, M.

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Book Id: WPLBN0003988849
Format Type: PDF Article :
File Size: Pages 11
Reproduction Date: 2015

Title: Comparison of Four Models Simulating Phosphorus Dynamics in Lake Vänern, Sweden : Volume 8, Issue 6 (30/11/-0001)  
Author: Dahl, M.
Volume: Vol. 8, Issue 6
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Pers, B. C., & Dahl, M. (-0001). Comparison of Four Models Simulating Phosphorus Dynamics in Lake Vänern, Sweden : Volume 8, Issue 6 (30/11/-0001). Retrieved from

Description: Department of Chemical Engineering, Karlstad University, SE-651 88 Karlstad, Sweden. 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

Comparison of four models simulating phosphorus dynamics in Lake Vänern, Sweden


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