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首页> 外文学位 >Decision analysis and risk analysis of multiple dam removals: Optimizing tradeoffs among dam failure risk, removal cost, and ecosystem benefit.
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Decision analysis and risk analysis of multiple dam removals: Optimizing tradeoffs among dam failure risk, removal cost, and ecosystem benefit.

机译：多个大坝拆除的决策分析和风险分析：在大坝故障风险，拆除成本和生态系统效益之间进行权衡优化。

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摘要

Decisions on dam removal or retention are complex and sometimes controversial because of economic and ecological tradeoffs, diverse stakeholders, as well as public safety concerns. This dissertation combines mathematical optimization, ecological models, and a public survey to analyze the benefits and costs of removing aging and deteriorating U.S. dams on tributaries to Lake Erie, where dam removal is considered as not only a viable habitat and ecosystem restoration tool, but also an effective management option to improve public safety.;Using multiobjective analysis, the main purpose of this dissertation is to analyze the cost-effectiveness of single or multiple dam removals by examining the interactions between dam removal actions and system responses and quantifying impacts upon social, ecological, and economic objectives of importance to decision managers and stakeholders. More specifically, this research develops and integrates multidisciplinary models for optimal selection of dams to be removed by considering three fundamental objectives: financial cost, lake-wide ecosystem health, and public safety.;Three multiobjective analysis models have been developed, each focusing on different aspect of the problems and tradeoffs and each with a case study in the Lake Erie basin. In particular, the first case study takes account of all possible financial costs of removing (;Overall, findings from three case studies communicate the general nature of the tradeoffs and complex interactions among dam removal related expenditures and risk management options, habitat and ecosystem restorations, and fish community dynamics; and more importantly, show the effect of alternative human value judgments on making the science-informed decisions to remove aging and unsafe U.S. dams.
机译：由于经济和生态方面的权衡，利益相关方的多样性以及公共安全的考虑，水坝拆除或保留的决定是复杂的，有时甚至是有争议的。本文结合数学优化，生态模型和公共调查，分析了清除伊利湖支流老龄化和恶化的美国水坝的收益和成本，在这里，除水不仅被认为是可行的栖息地和生态系统恢复工具，而且还被认为是可行的工具。通过多目标分析，本论文的主要目的是通过检查大坝拆除行动与系统响应之间的相互作用，并量化对社会，社会的影响，分析单个或多个大坝拆除的成本效益。对决策管理者和利益相关者至关重要的生态和经济目标。更具体地说，本研究开发并整合了多学科模型，以通过考虑以下三个基本目标来优化选择要拆除的水坝：财务成本，整个湖泊的生态系统健康和公共安全。;已经开发了三个多目标分析模型，每个模型都针对不同的目标问题和权衡的各个方面，并分别以伊利湖盆地为例。特别是，第一个案例研究考虑了所有可能的拆除成本（;总体而言，三个案例研究的结果传达了权衡的一般性质以及与大坝拆除相关的支出与风险管理方案，栖息地和生态系统恢复之间的复杂相互作用，以及鱼类群落动态；更重要的是，它显示了替代人类价值判断对做出科学依据的决定以消除老化和不安全的美国大坝的影响。

著录项

  • 作者

    Zheng, Pearl Qing Yuan.;

  • 作者单位

    The Johns Hopkins University.;

  • 授予单位 The Johns Hopkins University.;
  • 学科 Environmental Management.;Water Resource Management.;Engineering Environmental.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 239 p.
  • 总页数 239
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-17 11:38:19

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