The work package led by ETH will examine radiocarbon inventories of dissolved and particulate carbon phases in major river watersheds as well as in corresponding receiving (lake) basins. The first work package (ETH PhD #1) will focus on spatial and temporal variability in 14C characteristics of dissolved and particulate carbon species in rivers draining different Swiss ecoregions. The second work package (ETH PhD #2) will examine carbon inventories, residence times and transport pathways as a function of soil and drainage basin properties.