200751800 - Evaluation of artificial upwelling to enhance lower Columbia River Gorge chum salmon spawning

Sponsor: Pacific Northwest National Laboratory

Short description: Evaluate efficacy of using artificial hyporheic upwelling to enhance chum salmon spawning habitat.

Location: Lower Columbia province, Mainstem on the ground/Multiprovince subbasin

Budgets: FY08: $109,369 | FY09: $64,221

Primary species:
Anadromous: Chum: Columbia River ESU (threatened)


ObjectiveDescriptionSubbasin planStrategies
Increase chum spawning habitat The objective of this project is to induce chum salmon spawning in a previously unused area by creating artificial hyporheic upwelling to increase habitat suitability. Fundamental to our approach is the assumption that, in addition to appropriate physical habitat requirements (e.g., velocity, depth, and substrate), chum salmon require habitat for spawning where there is ample upwelling of relatively warm hyporheic water, which is the most important variable to chum salmon habitat use. Lower Columbia “Achieve a productivity of >1 recruit per spawner, and adult spawner populations of 1,250 at I-205, and 6,400 at Ives Island”.



  • ISRP: Innovative, On-The-Ground, Adequately Justified
  • Council: Not fundable
  • BPA: Not fundable