Substance specific erosion and transport, for example of phosphorous or organic matter, plays an important role in regional, but also global geochemical cycles. Existing erosion and sediment transport models do not reflect the selective nature of these redistribution processes. The project focuses on erosion experiments as well as soil sampling in the field. Fractionation techniques developed by the research group aim specifically at linking the physical characteristics of sediment determing particle movement with the chemical properties relevant for the environmental impact of soil erosion, e.g. phosphorous contamination of lakes or greenhouse gas emissions caused by erosion.