Tobias Bleninger is Professor (2011) for Environmental Fluid Mechanics and Applied Mathematics at the Department of Environmental Engineering of the Federal University of Paraná (UFPR) in Curitiba, Brazil. He is a Civil Engineer (2000) from the Karlsruhe Institute of Technology (KIT), Germany, where he did his Doctor in Environmental Fluid Mechanics (2006) and lead the research group of Environmental Fluid Mechanics of the Institute for Hydromechanics (2007-2011). His research focusses on physical and numerical modelling of mixing and transport processes in environmental fluid systems. Special research interests are related to i) mixing studies for outfall systems, ii) heat and substance transport phenomena in lakes and reservoirs, and iii) fluvial hydraulics of large rivers. He is currently Editor-in-Chief of the Journal of Applied Water Engineering and Research.

Industrial discharges into rivers: regulations, modeling and compliance assessment
 Tobias Bleninger, Department of Environmental Engineering, Federal University of Paraná, bleninger@ufpr.br
Compared to Marine Outfall Systems, Fluvial Outfall Systems are confronted with additional constraints regarding design and assessment. Fluvial systems usually are charecterized by their limited geometry, usually being very shallow, and high temporal variations, where ambient water depth and velocities may easily double when hydrological conditions change. Due to those constraints, also mixing characteristics are limited, and are order of magnitudes smaller compared to marine outfall systems. This requires usually higher level treatments to reduce not only substance concentrations, but also substance loads. More stringent water quality regulations (i.e. in the EU, but also in Brazil and other countries) demand hereby a better understanding and description of mixing processes, where in the past only the "fully mixed" value has been considered. This talk focusses on the description of case studies in the EU and in Brazil of industrial discharges into riverine waters, where mixing processes of substance concentrations and temperature were analyzed to improve and assess the discharge system.