I'm interested in all things groundwater. Topics that I have worked on include: geochemical and physical processes related to surface water groundwater interactions; heat as a tracer for water flows; isotopic tracers in hydrology; redox-processes; dissolved organic matter characterisation; ion exchange, the formation and dissolution of minerals; modeling of density dependent flow and transport, cave and karst hydrology; acid mine drainage and ecohydrology and subsurface ecosystems.