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This webinar was co-sponsored by ASCE's Environmental & Water Resources Institute (EWRI) and ASCE Continuing Education

Instructor:  F. Douglas Shields, Jr, Ph.D., P.E., BC.WRE, F.EWRI, F.ASCE

Course Length: 1 Hour

Purpose and Background

Stream restoration is widely practiced in developed countries, with annual expenditures in the U.S. exceeding $1 billion. Placement of large wood (felled trees or parts of trees) in degraded rivers and streams is one of the most widely practiced river restoration measures. Cost-effective application of large wood introduction is difficult because natural wood decays and is transported by rivers. Hazards posed by floating debris to downstream bridges and other infrastructure are always a concern. Design and project implementation guidance is found in three recently released government handbooks. This webinar is the third in a series, with the first two dealing with planning and preliminary design. Herein training is provided to familiarize students with computational approaches for detailed analysis of forces and moments acting on large wood placements. Key considerations for project implementation are also introduced, as are methods for constructability assessment. Construction topics include selection of large wood sources, transport methods, equipment selection, care of water, and seasonal scheduling. Safety is a primary concern in large wood construction due to hazards associated with riverine environments, heavy machinery and logging operations. Implementation of large wood projects should include provisions for adaptive management due to the high level of uncertainty in predicting stream response and overall project performance.

Primary Discussion Topics

• Review of information resources (design handbooks and spreadsheets) for large wood projects
• Reviews of force balance for large wood placements
• Moment balance for large wood placements
• Issues arising in project implementation
• Construction techniques and safety issues

Learning Outcomes

Upon completion of this course, you will be able to:

• Identify information resources (design handbooks and spreadsheets) for large wood
• Complete a force and moment balance and compute associated safety factors for large wood placement
• Conduct a constructability assessment for a given project and design
• Select appropriate types of equipment for project implementation
• List key environmental impact/permit issues for large wood projects in the USA
• Identify essential features of project safety plans

Webinar Benefits

• Learn key sources of guidance for large wood design and construction
• Avoid costly failures of river restoration projects that include large wood
• Avoid construction delays and impacts by identifying key considerations for implementation
• Learn to responsibly discharge duties of project engineer for safety during implementation

Assessment of Learning Outcomes

Students' achievement of the learning outcomes will be assessed via a short post-assessment (true-false, multiple choice and fill in the blank questions).

Intended Audience

• Hydraulic engineers
• Hydrologists
• Planners and project managers
• Geomorphologists
• Biologists and ecologists

Webinar Outline

• Review of information resources (design handbooks) for large wood as a restoration tool
• Hydraulic analysis/flow force computations
• Factors of safety based on force balance
• Factors of safety based on moment balance
• Sensitivity and Monte Carlo analyses
• Project implementation
• Revegetation and erosion control
• Adaptive management
• Summary

How to Earn your CEUs/PDHs and Receive Your Certificate of Completion

To receive your certificate of completion, you will need to complete a short on-line post-test and receive a passing score of 70% or higher within 1 year of purchasing the course.

How do I convert CEUs to PDHs?

1.0 CEU = 10 PDHs [Example: 0.1 CEU = 1 PDH]