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Related Experiment Videos

A risk-informed decision framework for setting environmental windows for dredging projects.

Burton C Suedel1, Jongbum Kim, Douglas G Clarke

  • 1U.S. Army Corps of Engineers, Engineer Research and Development Center, Vicksburg, Mississippi 39180-6199, USA.

The Science of the Total Environment
|June 24, 2008
PubMed
Summary
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Environmental windows restrict dredging to protect aquatic life but increase costs. This study proposes a new framework combining risk assessment and decision analysis for objective, cost-effective environmental window setting.

Area of Science:

  • Environmental science
  • Marine biology
  • Risk management

Background:

  • Dredging is vital for navigation infrastructure, with millions of cubic yards dredged annually in the U.S.
  • Dredging poses ecological risks, including increased turbidity, habitat disturbance, and harm to aquatic organisms.
  • Environmental windows are used to mitigate these impacts but often increase project costs.

Purpose of the Study:

  • To develop a structured, objective framework for setting environmental windows.
  • To balance biological resource protection with cost-effective navigation infrastructure maintenance.
  • To integrate risk assessment and decision-making tools for environmental management.

Main Methods:

  • Summarizing recent developments in risk assessment for non-chemical stressors.

Related Experiment Videos

  • Applying structured risk-informed decision-making tools to sediment and natural resource management.
  • Combining risk assessment with multi-criteria decision analysis (MCDA) to create a decision framework.

    • Main Results:

    • The proposed framework offers an objective process for setting environmental windows.
    • This approach aligns with National Academy of Sciences recommendations.
    • A hypothetical case study on Pacific herring in San Francisco Bay demonstrates the framework's application.

    Conclusions:

    • A novel framework integrating risk assessment and MCDA can improve environmental window setting.
    • This objective process can help balance ecological protection and economic considerations in dredging projects.
    • The framework provides a pathway for more effective and efficient environmental management in navigation maintenance.