Accounting for uncertainty in pedotransfer functions in vulnerability assessments of pesticide leaching to groundwater.

The article presents a study on the development of an isolation tool for site-particular vulnerability assessment of pesticide leaching to groundwater, based on the pesticide fate and transport model MACRO. In this study, the effects of uncertainty in the pedotransfer functions on simulation results were studied for 48 combination of soils, pesticides and application timings, by sampling pedotransfer function regression errors and spreading them through the simulation model in a Monte Carlo analysis. Relative to this, the pedotransfer function errors effected great variation in simulation results.