Dynamic models for predicting soil and water acidification: Application to three catchments in Fenno-Scandia

Abstract

We report here the application of 4 dynamic prosess-oriented models of soil and water acidification to data from three calibrated catchments: Birkenes, an acidified site in southernmost Norway, Stubbetorp, a traditional site in east-central Sweden and Yli-Knuutila, a well-buffered site in southernmost Finland. We calibrate the models to the observed conditions at present-day, and then use the calkibrated models to predict acidification over the next 50 years given 4 different scenarios of future acid deposition. The model predictions are compared and the differences evaluated with respect to the use of these models in determining critical loads.