Many challenges, including climate change, face the Nation’s water managers. The Intergovernmental Panel on Climate Change (IPCC) has provided estimates of how climate may change, but more understanding of the processes driving the changes, the sequence of the changes, and the manifestation of these global changes at different scales could be beneficial. Since the changes will likely affect fundamental drivers of the hydrological cycle, climate change may have a large impact on water resources and water resource managers. This book explores the strategies to improve water management by tracking, anticipating, and responding to climate change. Climate change will have numerous and diverse impacts, including impacts on human health, natural systems, and the built environment.