AUSTRALIAN RISK APPROACH FOR （澳大利亚风险方法）.pdf

AUSTRALIAN RISK APPROACH FOR ASSESSMENT OF DAMS M Barker1 ABSTRACT The Australian National Committee on Large Dams (“ANCOLD”) produced the Guidelines on Risk Assessment (“Guidelines”) in October 2003. The possible roles for risk assessment in reaching a conclusion on the safety of dams were given in the Guidelines as: (a) an enhancement to the traditional method; (b) an alternative to the traditional approach; and (c) a sole basis for decision making. At the time of the Guideline publication, ANCOLD only supported the first of these roles for important and conclusive decision making regarding dam safety. However, current use of the guidelines and application of risk assessment techniques have evolved and some of the States within Australia have accepted the second of the above, i.e. the use of both the traditional and risk assessment techniques for the safety regulation of dams. ANCOLD is currently in the process of developing supporting information for the Guidelines in order to: 1) Re-emphasise practice that is important but generally not being followed; 2) Provide explanatory notes to update practice or enhance guidance already provided; and 3) Introduce new concepts that should be included in current practice. The purpose of this paper (and conference presentation) is to provide an overview of the practices being followed within the Australian States with regard to the application of risk assessment in dam safety management and to provide information as to the status of the ANCOLD Guidelines on Risk Assessment supporting information. INTRODUCTION The 1994 ANCOLD Guidelines on Risk Assessment set out the conceptual foundations of risk assessment, as understood at the time and the 2003 Guidelines were directed to the practical application of risk assessment, as an aid to better dam s