Short course for UNIVERSIDAD NACIONAL DE INGENIERIA January 26-29, 2016
Planning and Design for Rehabilitation of Rivers Using Large Wood Metodología para Reforestar Ríos Degradados por Actividades Humanas usando Técnicas de Bioingeniería
12.0 Case study 2—Trinity River, California
Course overview Day I (Jan 26)--Foundational topics • Review of information resources (design handbooks and spreadsheets) for large wood • Is wood appropriate for your site?—criteria for screening (Planning)
Day 3 (Jan 28)—Risk, uncertainty and construction • Sensitivity and Monte Carlo analyses • Constructability assessment
• Three design approaches
• Case study II—Trinity River, California
• Key issues for large wood design
• Monitoring
Day 2 (Jan 27)—Designing large wood structures • Case study I—Little Topashaw Creek, Mississippi • Design life for wood structures/selection of design event or condition
Day 4 (Jan 29)--Field trip
Shields Engineering LLC
• Introductions
• Types of wood structures • Findings of recent research on drag and lift coefficients • “Road testing” selected design spreadsheets
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Shields Engineering, LLC
Trinity River, California
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Shields Engineering, LLC
An overview of the project
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Shields Engineering, LLC
A mountain river impacted by gold mining
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Shields Engineering, LLC
Simplified, straight channel
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Shields Engineering, LLC
Rehabilitated by constructing complex side channels
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• Deflector structure • Bar stabilization (bar apex) • Habitat within side channel
Shields Engineering, LLC
Large wood used in three ways
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Shields Engineering, LLC
Constructing side channels
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Shields Engineering, LLC
Side channel in 2015
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Shields Engineering, LLC
Side channel in 2015
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Shields Engineering, LLC
Side channel in 2015
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Shields Engineering, LLC
Side channel in 2015
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Side channel in 2015
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Shields Engineering, LLC
Side channel in 2015
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Trinity River Restoration • Gold mining • Dam operation • Flow diversion
• Restoration objective—salmon population • Restoration methods • • • •
Side channel construction Large wood Plantings Partial restoration of flow
Shields Engineering, LLC
• River drastically changed by
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