DAM SAFETY PORTFOLIO RISK ASSESSMENT AND MANAGEMENT

摘要

Portfolio Risk Management (PRM) is a risk-informed approach for improved management of dam safety for a portfolio of dams in the context of the owner's business. It can be used to strengthen technical and organizational aspects of a dam safety program, and to provide valuable inputs to various business processes. Portfolio Risk Assessment (PRA) is a decision-support tool, which is incorporated in PRM. It can combine engineering standards and risk assessment approaches to provide a systematic means for identifying, estimating and evaluating dam safety risks, including comparisons with other industries. It should be periodically updated to provide a basis for managing prioritized queues of investigations and risk-reduction measures to achieve more rapid and cost-effective reduction of both knowledge uncertainty and risk. PRA is a standard of practice in Australia and is being applied by the Corps of Engineers and others. When properly conducted and used within its limitations, the PRA process is generally considered to be robust, adaptive, defensible for corporate governance, and to justify its cost through such benefits as increased dam safety funding, identification of failure modes that were not previously recognized, identification of opportunities for improved risk management, and more rapid knowledge uncertainty and risk reduction.