Alluvial fans are gently sloping, fan-shaped landforms common at the base of mountain ranges in arid and semiarid regions such as the American West. Floods on alluvial fans, although characterized by relatively shallow depths, strike with little if any warning, can travel at extremely high velocities, and can carry a tremendous amount of sediment and debris. Such flooding presents unique problems to federal and state planners in terms of quantifying flood hazards, predicting the magnitude at which those hazards can be expected at a particular location, and devising reliable mitigation strategies. Alluvial Fan Flooding attempts to improve our capability to determine whether areas are subject to alluvial fan flooding and provides a practical perspective on how to make such a determination. The book presents criteria for determining whether an area is subject to flooding and provides examples of applying the definition and criteria to real situations in Arizona, California, New Mexico, Utah, and elsewhere. The volume also contains recommendations for the Federal Emergency Management Agency, which is primarily responsible for floodplain mapping, and for state and local decisionmakers involved in flood hazard reduction.

The United States has one of the largest and costliest flood control systems in the world, even though only a small proportion of its land lies in floodplains. Rivers by Design traces the emergence of the mammoth U.S. flood management system, which is overseen by the federal government but implemented in conjunction with state governments and local contractors and levee districts. Karen M. O’Neill analyzes the social origins of the flood control program, showing how the system initially developed as a response to the demands of farmers and the business elite in outlying territories. The configuration of the current system continues to reflect decisions made in the nineteenth century and early twentieth. It favors economic development at the expense of environmental concerns. O’Neill focuses on the creation of flood control programs along the lower Mississippi River and the Sacramento River, the first two rivers to receive federal flood control aid. She describes how, in the early to mid-nineteenth century, planters, shippers, and merchants from both regions campaigned for federal assistance with flood control efforts. She explains how the federal government was slowly and reluctantly drawn into water management to the extent that, over time, nearly every river in the United States was reengineered. Her narrative culminates in the passage of the national Flood Control Act of 1936, which empowered the Army Corps of Engineers to build projects for all navigable rivers in conjunction with local authorities, effectively ending nationwide, comprehensive planning for the protection of water resources.

Flood Resilience collates innovative ideas, methodologies and practical approaches which address engineering challenges during various stages of flooding, from assessment of vulnerability, implementation of protective measures, through to management of extreme events in order to promote faster recovery after a flood.