Element fluxes in small boreal catchments

The transport of dissolved metals derived from primary and secondary minerals as well as colloidal/particulate species is a highly. Here, we are conducting long term monitoring and evaluation of hydrogeochemical data that includes general parameters as well as trace metals and the principal high molecular weight ligands. Since the study began in 2006 the concentration variations for most trace metals such as Cu, Pb and U but also major constituents including Al and Fe, have reached four orders of magnitude. The controlling mechanisms are ligand productions (including humic substances), precipitation intensities and redox conditions. Trend analysis clearly indicates increased concentrations of humic substances as well as trace metals from both primary minerals and secondary sources.