ABSTRACT
Climate change is now largely accepted as a real, pressing, and truly global problem, and scientific evidence for global warming is now considered irrevocable (Allison et al. 2009). Understanding the potential impacts of current and future climate conditions on hydrological processes is gaining more impetus in the present day because of the social and political implications of water. The Fourth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC 2007) has addressed many previous concerns pertaining to the credibility of climate change in scientific and policy discussions. There is an increasing consensus among the scientific community that climate change will have a significant effect on water resources (Bates et al. 2008; Cromwell et al. 2009; Xu et al. 2007; etc.). Listed hereafter is a summary of the various potential impacts of climate change on water supply systems (Arnell and Delaney 2006; Bates et al. 2008):
• It is expected to cause an increase in volume of precipitation and average runoff in high latitudes and part of the tropics and a decreased volume in some subtropical and lower latitude regions.
