Abstract
An important requirement of the Balaton ecological Modelling (BEM) approach to water-body modelling is to give nutrient loading estimation for Lake Balaton. This was done for the Western Basin, that is the daily phosphorus and nitrogen loading of communal sewage and estimates were made of the loading of agricultural origin discharged by River Zala. The approaches used are described by different submodels: submodels which separate flood-waves from base-flow, regression submodels for the relationships between the discharge and different kinds of nutrient loadings, a submodel which separates the phosphorus and nitrogen of communal sewage and those of agricultural origin and an erosion submodel. On the basis of these submodels a simulation was performed for the time interval 1976–1979. The monthly and yearly averages of the simulated daily results in good agreement with the existing measurements.
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