Supporting commission(s) / organisations: ICSW, ICSH, ICRS

Although significant advances were made during the previous scientific decade of IAHS, Predictions in ungauged basins (PUB), the topic remains highly relevant, necessary and inspiring. Hydrological models are called to address, apart from PUB at varying spatiotemporal scales, the hydrological effects of climate change and change of the human systems (society). Advances in PUB will hence greatly benefit many of the emerging issues to be addressed by the hydrologic community. The hydrological models for PUB need to be less dependent on calibrated conceptual relationships and more dependent on better physical understanding of the governing processes at the catchment scale. Contributions are invited to this symposium that address all aspects of predictions in ungauged basins, from classic regionalization strategies of model parameters to optimal use of available (new) information, new modelling concepts and model philosophies.