Model output of agrochemical fate and transport on a catchment scale under extreme climate simulation scenarios.

The export of agrochemicals and their transformation products (TPs) following their application in the agricultural fields poses a threat to water quality. In this research, we use an integrated modelling framework to understand the impact of extreme climate events on the fate and transport of the agrochemical S-Metolachlor and two of its TPs (M-OXA, Metolachlor Oxanilic Acid and M-ESA, Metolachlor Ethyl Sulfonic Acid). This is done by coupling climate model outputs to the Zin-AgriTra agrochemical reactive transport model in four simulation scenarios. 1) Reference (2015-2018), 2) Very dry (2038-2041), 3) Very wet (2054-2057) and 4) High temperature (2096-2099) conditions of a selected RCP8.5 based regional climate scenario. The modelling framework is tested on an agricultural catchment, Wulka, in Burgenland, Austria. The model output of the four simulation scenarios and an additional model run S1_eq are presented in the dataset. The additional simulation scenario also represents the reference scenario but uses daily disaggregated rainfall to get a realistic comparison with the climate simulation scenarios. The overview of different model output parameters and their description are included.