As an integrated part of the EU Life project ArtWET - Mitigation of agricultural nonpoint-source pesticide pollution and phytoremediation in artificial wetland ecosystems - a tool was built to model pesticide pollution in surface waters following rainfall runoff events at the European scale.

The geodata used for simulation is taken from freely available sources. The OECD-REXTOX and USDA Curve number models were combined to calculate predicted concentrations in stream. The potential effects are modeled with the toxic units approach. First runs with several commonly used pesticides show a realistic range of runoff pollution and potential toxicity values. The whole approach was realized using ArcGIS model builder.