Approaches to refining pesticide risk assessments – the spatial estimation of potential leaching risk

A Geographic Information System (GIS) has been combined with a simple leaching model to characterize the factors that influence pesticide leaching, and to identify the spatial distribution of these factors. The results were compared with those of a conventional simulation modeling approach, and a strong correlation was found for 40 selected sites in central and eastern USA. ©1999 Society of Chemical Industry