In the past decades, climate change (CC) has become a consistent global threat and research challenge, and there is rising concern that CC will alter a wide spectrum of drivers that are likely to impact our continental and global hydrological domains both in terms of natural and socioeconomic processes. Responding to the challenge of global CC, the Intergovernmental Panel on Climate Change (IPCC) was established in 1988 and in a special report published special emission scenarios (SRES), of which the A1B and B1 scenarios are considered as the most likely ones. Therefore, they have been evaluated in the BRAHMATWINN project. © Springer India 2015.