This report illustrates the results of two research projects of the German Federal Environmental Agency that ran parallel: - FKZ 204 24 218: Model-based quantification and internet-based visualisation of emissions into Germany’s rivers („Prioritary substances“) - FKZ 205 24 204: Development of a management tool on emissions into surface waters within the framework of the international reporting commitment („Nutrients“) The aim of both projects was a methodological development of the MONERIS model to quantify emissions from point and diffuse sources into Germany’s surface waters. The following substances were considered: nitrogen (TN) and phosphorus (TP) as nutrients as well as the 7 heavy metals cadmium (Cd), chrome (Cr), copper (Cu), mercury (Hg), nickel (Ni), lead (Pb) and zinc (Zn) as well as polycyclic aromatic hydrocarbons (PAH). Both projects are based on consistent sub-basins and the according basic data as well as homogenous calculation algorithms that are adapted to the specifications of each substane group.