Managing Water Resources In The West Under Conditions Of Climate Uncertainty

The question of whether the earth's climate is changing in some significant human-induced way remains a matter of much debate. But the fact that climate is variable over time is well known. These two elements of climatic uncertainty affect water resources planning and management in the American West. Managing Water Resources in the West Under Conditions of Climate Uncertainty examines the scientific basis for predictions of climate change, the implications of climate uncertainty for water resources management, and the management options available for responding to climate variability and potential climate change.

Global change possesses serious challenges for water managers and scientists. In mountain areas, where water supplies for half of the world population originate, climate and hydrologic models are still subject to considerable uncertainty. And yet, critical decisions have to be taken to ensure adequate and safe water supplies to billions of people, millions of farmers and industries, without further deteriorating rivers and water bodies. While global warming is known to cause glaciers’ retreat and reduced snow packs around the world, it is not clear that mountain discharge will be lower. What is widely recognised is that water management must be adapted to accommodate significant regime changes. However, this inevitably involves managing transboundary rivers, adding further complexity to putting principles in practice. This book takes global warming and the importance of mountain areas in world water resources as the starting point. First, it provides detailed reviews of the processes going on in several rivers systems and world regions in Europe (Rhône and Ebro), North America (Canadian Rockies, Western US and Mexico), the Middle East (Jordan), Africa (Tunisia, Kenya and South Africa). These contexts provide case studies and examples that show the difficulties and potential for adaptation to global change. Land-use, economics, numerous modeling approaches are some of the cross-cutting issues covered in the chapters. The volume also includes the views of water practitioners, with two chapters authored by members of the US-Canada International Joint Commission, an industrialist from Western Canada and an environmental leader in Spain. By combining a rich set of contexts and approaches, the volume succeeds in offering a view of the global challenges faced by water agencies, international donors and researchers around the world. A case is made in some chapters to seek adaptive strategies rather than trying to reduce or control resources variability. This requires factoring in land-use, social and economic aspects, especially in developing countries. Another conclusion is that complex problems can and must be posed and negotiated with the help of models, mapping techniques and science-based facts. However complex these may be, there are ways to translate them to easily interpretable and visualisations of alternative scenarios and courses of action. This book provides numerous examples of the potential of such approaches to draft environmental programmes solve transboundary disputes and reduce the economic consequences of droughts and climate instability.

This book aims to come up with views to address the queries of planners, policymakers, and general people for water resources management under uncertainty of climate change, including examples from Asia and Europe with successful adaptive measures to change the challenge of climate change into opportunities. The availability of clean water is a major global challenge for the future due to a rapidly growing population and urbanization where further stress in water resources is expected due to the impact of climate change. The wide range of impacts includes for example changes in hydrology, moisture availability, spatial and temporal variations in magnitude of stream flow, and dwindling of water levels with adverse effect on wetlands and ecosystem. As a consequence, water management has become a serious issue and was identified as a global societal challenge, and climate change forecasting has become one of the key issues in recent research on sustainable water resources management.

Water Policy and Planning in a Variable and Changing Climate addresses the current challenges facing western water planners and policy makers in the United States and considers strategies for managing water resources and related risks in the future. Written by highly-regarded experts in the industry, the book offers a wealth of experience, and explains the physical, socioeconomic, and institutional context for western water resource management. The authors discuss the complexities of water policy, describe the framework for water policy and planning, and identify many of the issues surrounding the subject. A provocative examination of policy issues surrounding western water resources, this book: Considers the implications of natural climate variability and anthropogenic climate change for the region’s water resources, and explains limitations on the predictability of local-scale changes Stresses linkages between climate patterns and weather events, and related hydrologic impacts Describes the environmental consequences of historical water system development and the challenges that climate change poses for protection of aquatic ecosystems Examines coordination of drought management by local, state and national government agencies Includes insights on planning for climate change adaptation from case studies across the western United States Discusses the challenges and opportunities in water/energy/land system management, and its prospects for developing climate change response strategies Presents evidence of changes in water scarcity and flooding potential in the region and identifies a set of adaptation strategies to support the long-term sustainability of irrigated agriculture and urban communities Draws upon Colorado’s experience in defining rights for surface and tributary groundwater use to explain potential conflicts and challenges in establishing fair and effective coordination of water rights for these resources Assesses the role of policy in driving flood losses Explores policy approaches for achieving equitable and environmentally responsible planning outcomes despite multiple sources of uncertainty Water Policy and Planning in a Variable and Changing Climate describes patterns of water availability, existing policy problems and the potential impacts of climate change in the western United States, and functions as a practical reference for the student or professional invested in water policy and management.

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 sequences 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 resources managers. The purpose of this interagency report is to explore strategies to improve water management by tracking, anticipating, and responding to climate change. Charts and tables.

Describes the water management community¿s needs for climate change info. and tools to support long-term planning. Technical specialists and program managers have worked with their planners, water operators, and environmental compliance managers to identify the information and tools most relevant to their programs. They also have engaged and consulted with other Federal, State, and local agencies and stakeholder groups that have a role in water and water-related resource management to identify complementary priorities and individual perspectives. This report will help focus research and technology efforts to address info. and tools gaps relevant to the water management user community. Charts and tables. This is a print on demand report.

Confronting Climate Uncertainty in Water Resources Planning and Project Design describes an approach to facing two fundamental and unavoidable issues brought about by climate change uncertainty in water resources planning and project design. The first is a risk assessment problem. The second relates to risk management. This book provides background on the risks relevant in water systems planning, the different approaches to scenario definition in water system planning, and an introduction to the decision-scaling methodology upon which the decision tree is based. The decision tree is described as a scientifically defensible, repeatable, direct and clear method for demonstrating the robustness of a project to climate change. While applicable to all water resources projects, it allocates effort to projects in a way that is consistent with their potential sensitivity to climate risk. The process was designed to be hierarchical, with different stages or phases of analysis triggered based on the findings of the previous phase. An application example is provided followed by a descriptions of some of the tools available for decision making under uncertainty and methods available for climate risk management. The tool was designed for the World Bank but can be applicable in other scenarios where similar challenges arise.

This book is the product of a worldwide collaboration among UN water resources programs, prominent national water resources operating agencies and selected academic specialists. It deals directly with some of the most difficult problems water engineers, managers and decision makers face when designing and implementing water resources infrastructure under new patterns of climate variability. Projecting the probabilities and risks associated with such events has traditionally been central to water resources planning and modeling. Such projections have been keys to social, environmental, economic, and financial investment decisions making. However, our contemporary world has called into question some of the traditional methods and approaches to formulating such projections. This collection provides practical grounding in selected advances already in place and practiced by leading institutions; advances that could be readily adapted by the water resources engineering and design professionals to better deal with risk and uncertainty in a non-stationary climate world. We believe this book opens important venues which can help to enhance the water and climate dialogues worldwide.