Environmental Modelling & Software
Evaluation of landscape and instream modeling to predict watershed nutrient yields
Environmental Modelling & Software
Modifications to the SWAT code for modelling direct pesticide losses
Environmental Modelling & Software
Autocalibration in hydrologic modeling: Using SWAT2005 in small-scale watersheds
Environmental Modelling & Software
Environmental Modelling & Software
Position Paper: A quantitative phosphorus loss assessment tool for agricultural fields
Environmental Modelling & Software
Decision support for diffuse pollution management
Environmental Modelling & Software
Environmental Modelling & Software
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The ecological status of Lake Pyhajarvi may be classified as moderate due to its elevated nutrient concentrations and algal biomass production. Therefore, the Eurajoki river basin, including Lake Pyhajarvi, has been chosen as the Finnish test catchment in an EU project on benchmarking models for the Water Framework Directive. One aim of the project is to test the suitability of models for the assessment of management options proposed to meet the surface water quality targets. The catchment model SWAT is currently being tested for its applicability for analysing the effectiveness of proposed measures to reduce agricultural and sparse settlement nutrient loading. The model is being applied to the river Ylaneenjoki catchment draining to Lake Pyhajarvi. First results indicate that SWAT can be calibrated for flow and sediment yield using catchment scale parameters. For nutrients, however, parameters describing more detailed catchment processes have to be calibrated. The preliminary essay on measures such as buffer strips indicate that SWAT includes relevant management options that affect nutrient leaching. However, the descriptions of these management options require some modifications in order to describe correctly the reduction efficiency in local conditions.