My research aims to understand the hydrological and biogeochemical processes controlling the mobilization, transformation, and transport of solutes from land to surface waters that can support successful management strategies for aquatic resources. My empirical work focusses on processes operating at hillslope, riparian (near-stream), and catchment scales with the ambition to upscale those processes to the larger landscape scale. In addition, my research interest and expertise include process-based modelling for climate impact assessment on catchment hydrology and biogeochemistry. The core of both my empirical and modelling research is based on the study of organic carbon dynamics and their implications for the global carbon cycle and drinking water supply. I also work with nutrients, metals, base cations, silica, and sulfate.