These are the proceedings of the 2nd international Junior Researcher and Engineer Workshop on Hydraulic structures (IJREWHS'08) organized by the Hydraulic structures section of the IAHR (International Association of Hydraulic Engineering and Reasearcher). It follows the successful one held in Portugal in 2006. The main themes of the workshop were: river structures; hydraulic of dams; urban drainage structures; bridge scours; labyrinth weirs; stepped spillways; hydraulic jump; air-water flow; fishways and block ramps. All the papers have been presented by young reaserchers and engineers. Authors are from 18 differt counties involving 5 continents. This workshop gave the unique opportunity to young engineers and researchers to present, chair sessions and prepare reports. The proceedings contain 31 papers reviewed by experienced researchers.