Documentation and Demonstration of a Process for Risk Analysis of Proposed Modifications to the Sacramento River Flood Control Project (SRFCP) Levees

摘要

The US Army Corps of Engineers (USACE), South Pacific Division (CESPD), has required assistance from the Hydrologic Engineering Center (CETWR-HEC) on a study of the Sacramento River Flood Control Project (SRFCP) levees. The SRFCP is a large system that includes regulated and unregulated inflows, watercourse, bypasses, hydraulic structures, and tidal influences. The request relates to the determination of possible system impacts due to a non-Federal project and the documentation required for compliance with 33 USC 408 permitting process. The impact analysis requires a comprehensive approach that considers system-wide assessment of potential transfer of risk in terms of system performance. This report provides the methods and steps to use current probabilistic analysis tools in a system-wide context to assess performance from modifications to project levee.