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ID: 2522

Buxton, T. H. and D. N. Bradley. 2021. Evolution of tributary junctions and their capacity for rearing juvenile Chinook salmon (Oncorhynchus tshawytscha) on a regulated river. Presentation provided to the Trinity River Restoration Program (TRRP) Science Symposium on 2021-11-10. TRRP, Weaverville, California. Available:

Presentation given to the Physical session of the TRRP Science Symposium Brownbag Sessions.

The study examines changes in the active channel, exposed bars, and delta areas in an unconfined and confined valley where Rush and Indian creeks respectively join the Trinity River. The examination is made with aerial imagery analyses starting from dam closure in 1960 through 2020. Within this period, regulated flows were successively increased from a low in 1961?1980, and indexes of sediment supply, surveys of riparian plant composition, and valley attributes are considered to explain the observed responses in the valleys. Chinook salmon rearing capacity is modeled under current conditions with estimates used to evaluate the suitability of the junction areas for the juvenile life stage of this species.

First Posted: 2021-11-18 20:15:04

Post Updated: 2022-01-13 18:53:40