Future climate change may profoundly impact hydrological processes and ecosystem functions. The scientific challenge for water resources management is the prediction of water availability in a changing climate. This session solicits contributions that address advances in understanding climate-water relationships, surface hydrologic and ecologic mechanisms and underlying dynamics that control runoff generation. Particular interests include methods for detecting hydrological variability and change, large scale climate-hydrology interactions, novel modelling approaches for dealing with hydroclimatic non-stationarity, hydrological model calibration and testing for climate change impact assessment, surface-groundwater connectivity, and CO2 fertilisation effect on catchment hydrology. We invite contributions from across the meteorological, ecological and hydrological communities to advance process understanding across temporal and spatial scales, using cross-disciplinary tool such as analytical and statistical methods.