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首页> 外文会议>Canadian Dam Association 3rd Annual Conference, Sep, 2000, Regina, Saskatchewan >Inflow Design Flood Selection: Current Guidelines and Future Approaches
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Inflow Design Flood Selection: Current Guidelines and Future Approaches

机译：入流设计洪水选择：当前指南和未来方法

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This paper offers suggestions for the selection and prioritized achievement of Flood performance goals (safety standards) for dam safety. The paper is not intended to be definitive on the subject of Inflow Design Flood (IDF) selection or dam safety management practices, nor does it in any way reflect BC Hydro's present policies in selection of IDFs. This paper is aimed at fostering open discussion and idea exchange, and by no means represents a definitive solution to a very complex problem. The "sliding scale performance goals related to consequences of failure" principle that is fundamental to the Canadian Dam Safety Guidelines requires that dam safety assessments involve application of concepts, such as tolerable levels of risk, and processes that go beyond currently accepted dam safety practice. A significant challenge is encountered when applying the "sliding scale" principle in the "Low" and "High" consequence categories. In these categories it is necessary to make good estimates of the consequences of dam failure, including loss of life in the "High" category, and to relate the consequences of dam failure to the performance goals such as the Inflow Design Flood. The objective of the paper is to identify the problems associated with relating performance goals to consequence categories and to put forward to the Association suggestions for developing a rational, scientifically based, transparent process for selecting IDFs. This paper is a logical extension of previous discussions on IDF selection and expands the discussion into the concepts of reducing risk from dams to "As Low As Reasonably Practicable" (ALARP). Dam owners also face a challenge when prioritizing dam safety improvement activities, particularly when associated with the review or selection of acceptable performance goals such as IDFs. A suggested implementation process for a prioritized dam safety management program, with a focus on the selection of appropriate Inflow Design Floods (IDFs) for dam safety improvement for High consequence dams, is discussed. An option is put forward for selecting a minimum level of IDF to be achieved in the interim pending reduction of risks to As Low as Reasonably Practicable. The paper also presents regulatory aspects of the latest update of BC Hydro's dam safety practices information base concerning international practices in selecting IDF's. The paper does not fully support the concept of "sliding scale of performance goals related to failure consequence" and raises the question as to whether the "sliding scale" is compatible with emerging regulatory philosophies concerning public safety.
机译：本文为大坝安全的洪水性能目标（安全标准）的选择和优先实现提供了建议。本文并非旨在确定流入设计洪水（IDF）选择或大坝安全管理实践的主题，也不以任何方式反映BC Hydro在选择IDF中的现行政策。本文旨在促进公开讨论和思想交流，但绝不代表对一个非常复杂的问题的明确解决方案。 《加拿大大坝安全指南》的基本原则是“与故障后果有关的规模绩效目标”，要求大坝安全评估涉及概念的应用，例如可承受的风险水平以及超出当前公认的大坝安全实践的过程。当在“低”和“高”结果类别中应用“滑动标度”原理时，会遇到重大挑战。在这些类别中，有必要对水坝破坏的后果做出良好的估计，包括“高”类别的生命损失，并将水坝破坏的后果与性能目标（例如流入设计洪水）联系起来。本文的目的是确定与将绩效目标与后果类别相关联的问题，并向协会提出建议，以制定合理，科学，透明的选择IDF的流程。本文是对先前有关IDF选择的讨论的合乎逻辑的扩展，并将讨论扩展到了将风险从大坝降低到“合理可行的最低”（ALARP）的概念。大坝所有者在确定大坝安全改进活动的优先顺序时也面临挑战，特别是在与审查或选择可接受的性能目标（例如IDF）相关联时。讨论了优先大坝安全管理计划的建议实施过程，重点是选择适当的流入设计洪水（IDF），以改善高危大坝的大坝安全。提出了一个选择方案，可以选择在将风险降低到合理可行的最低水平之前的临时IDF最低水平。本文还介绍了BC Hydro的大坝安全实践信息库的最新更新中有关选择IDF的国际实践的法规方面。本文没有完全支持“与失败后果相关的绩效目标的滑动规模”的概念，并提出了一个问题，即“滑动规模”是否与新兴的有关公共安全的监管理念兼容。

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