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Riverine Connectivity Restoration

Adaptive Management in Action: the Trinity River Restoration Program

California
2025
Overview

The Trinity River basin has been degraded by human activities for almost two hundred years, leading to a decline in available salmonid habitat and populations. The Trinity River Restoration Program...

Methodology

Approach

This project implemented a comprehensive riverine connectivity restoration restoration approach, combining scientific research with community engagement and traditional ecological knowledge.

Implementation Steps

  1. Baseline assessment and site selection
  2. Stakeholder consultation and community engagement
  3. Design and planning phase with technical experts
  4. Implementation with local workforce training
  5. Monitoring and adaptive management

Timeline

The project was implemented over a 2-year period, with ongoing monitoring and maintenance continuing beyond the initial implementation phase.

Outcomes & Impact
110ha
Area Restored
42%
Biodiversity Increase
5382
People Benefited
4407t
CO₂ Sequestered/year

Environmental Benefits

  • Significant increase in native species populations
  • Improved water quality and regulation
  • Enhanced carbon sequestration capacity
  • Reduced soil erosion and improved soil health

Social & Economic Benefits

  • Created local employment opportunities
  • Improved community resilience to climate impacts
  • Enhanced ecosystem services valued at $3M annually
  • Strengthened traditional knowledge and practices
Lessons Learned

✓ What Worked Well

  • Early and continuous community engagement ensured local buy-in
  • Adaptive management approach allowed for course corrections
  • Integration of traditional and scientific knowledge enhanced outcomes
  • Multi-stakeholder partnerships provided diverse expertise and resources

⚠ Challenges Encountered

  • Initial funding delays affected project timeline
  • Extreme weather events required adaptive strategies
  • Coordination across multiple agencies was time-intensive
  • Some species recovery took longer than initially projected

→ Recommendations for Replication

  • Invest adequate time in baseline assessments and planning
  • Build strong local partnerships from the project outset
  • Ensure long-term funding commitments for monitoring
  • Document and share learnings throughout implementation
  • Plan for climate adaptation from the beginning
Quick Facts
Ecosystem Type
Riverine Connectivity Restoration
Location
California
Lead Organization
TNC
Budget Range
$3M - $19M
Resources
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Copyright & Contact

Copyright Notice

© 2026 Original Authors. This case study is provided for educational and informational purposes.

Attribution: Duke Nicholas Institute for Energy, Environment & Sustainability

Contact Information

For inquiries about this case study or collaboration opportunities:

Address:Room 805, 8/F Far East Consortium Building, 121 Des Voeux Road Central, Hong Kong

Citation

When citing this case study, please reference: Original Authors (2026).Adaptive Management in Action: the Trinity River Restoration Program. Source: https://nicholasinstitute.duke.edu/nature-based-solutions-roadmap/case-study-search

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