Professor Yi Zheng (Southern University of Science and Technology, Shenzhen, China) has given his lecture Hydrological modeling in the era of big data: process-based versus data-driven models. The second speaker was Professor Florian Pappenberger (Director of Forecasts, European Centre for Medium-Range Weather Forecasts (ECMWF), UK) with his lecture on Operational perspective on sub-seasonal forecasts. The third guest of our school was Professor Jeffrey McDonnell (University of Saskatchewan, Canada). He has given his lecture Runoff generation processes and how to develop a perceptual model for numerical watershed modelling. The most interesting questions were sent by School listeners from Russia, Nigeria, Turkey, France.