This book is open access under a CC BY-NC 4.0 license. This revised, updated textbook presents a systems approach to the planning, management, and operation of water resources infrastructure in the environment. Previously published in 2005 by UNESCO and Deltares (Delft Hydraulics at the time), this new edition, written again with contributions from Jery R. Stedinger, Jozef P. M. Dijkman, and Monique T. Villars, is aimed equally at students and professionals. It introduces readers to the concept of viewing issues involving water resources as a system of multiple interacting components and scales. It offers guidelines for initiating and carrying out water resource system planning and management projects. It introduces alternative optimization, simulation, and statistical methods useful for project identification, design, siting, operation and evaluation and for studying post-planning issues. The authors cover both basin-wide and urban water issues and present ways of identifying and evaluating alternatives for addressing multiple-purpose and multi-objective water quantity and quality management challenges. Reinforced with cases studies, exercises, and media supplements throughout, the text is ideal for upper-level undergraduate and graduate courses in water resource planning and management as well as for practicing planners and engineers in the field.

The U.S. Army Corps of Engineers, through its civil works program, can take pride in its contributions throughout our nation's history to the development of waterways infrastructure, navigation, flood damage reduction, water resources development and protection, and environmental restoration. Many projects that have been pioneering in their concept and bold in their execution were made possible by the creativity and dedication of outstanding scientists, engineers, and builders. The Corps has always had review processes for evaluation of its planning studies and projects, with the focus often being largely on the technical aspects. In recent years, however, increased consideration of such factors as environmental impacts, economic evaluations, political pressures, and new paradigms about flood control and management has engendered increased criticism and concern that some of the Corps' studies may have led to conclusions, recommendations, and project decisions that are not adequately supported by the assumptions and analyses that were used. The focus of the report is on review of Corps of Engineers studies, with careful attention given to the need for independent, external reviews by panels of well-qualified and impartial experts for large, complex, and sensitive projects.

The U.S. Army Corps of Engineers has long been one of the federal government's key agencies in planning the uses of the nation's waterways and water resources. Though responsible for a range of water-related programs, the Corps's two traditional programs have been flood damage reduction and navigation enhancement. The water resource needs of the nation, however, have for decades been shifting away from engineered control of watersheds toward restoration of ecosystem services and natural hydrologic variability. In response to these shifting needs, legislation was enacted in 1990 which initiated the Corps's involvement in ecological restoration, which is now on par with the Corps's traditional flood damage reduction and navigation roles. This book provides an analysis of the Corps's efforts in ecological restoration, and provides broader recommendations on how the corps might streamline their planning process. It also assesses the impacts of federal legislation on the Corps planning and projects, and provides recommendations on how relevant federal policies might be altered in order to improve Corps planning. Another important shift affecting the Corps has been federal cost-sharing arrangements (enacted in 1986), mandating greater financial participation in Corps water projects by local co-sponsors. The book describes how this has affected the Corps-sponsor relationship, and comments upon how each group must adjust to new planning and political realities.

This open access textbook provides a concise introduction to economic approaches and mathematical methods for the study of water allocation and distribution problems. Written in an accessible and straightforward style, it discusses and analyzes central issues in integrated water resource management, water tariffs, water markets, and transboundary water management. By illustrating the interplay between the hydrological cycle and the rules and institutions that govern today’s water allocation policies, the authors develop a modern perspective on water management. Moreover, the book presents an in-depth assessment of the political and ethical dimensions of water management and its institutional embeddedness, by discussing distribution issues and issues of the enforceability of human rights in managing water resources. Given its scope, the book will appeal to advanced undergraduate and graduate students of economics and engineering, as well as practitioners in the water sector, seeking a deeper understanding of economic approaches to the study of water management.

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 reviews the Corps of Engineers' experiences to date with the concept of "adaptive management" and provides advice on additional and more effective implementation of this planning approach. The adaptive management concept itself is complex and evolving, but might be summarized as "learning while doing." The book reviews literature on adaptive management and notes that a range of adaptive management practices present themselves for Corps projects. It is noted that there is no "cookbook" approach to adaptive management, and the book encourages the Corps of Engineers to continue to work with and learn from its applications of the concept. To facilitate institutional learning and to ensure that experiences are being employed across the agency, the book recommends that a Corps Center for Adaptive Management be established. The book also notes that greater involvement from the administration and Congress will be essential to successful adaptive management applications, as the Corps' efforts in this area will benefit from clarified water resources management objectives, the authority to manage adaptively, and from resources necessary for programs such as stakeholder collaboration and post-construction evaluations.