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A typology of hydraulic barriers to salmon migration in a bedrock river

Resource type
Thesis type
(Thesis) M.Sc.
Date created
2022-11-21
Authors/Contributors
Abstract
Salmon spend the majority of their life in the ocean, coming into inland rivers for the purpose of spawning. The Fraser River is one of the most productive salmon spawning rivers in the world, and is therefore paramount to understand where hydraulic barriers – reaches of river where fish migration is delayed due to high water velocity – exist. I explore locations in the Fraser River that are apt to be hydraulic barriers based on centerline velocity. Barriers are classified as either 1) plunging flows, where flow is deep with the highest velocities lower in the water column, 2) rapids, where flow is fast and shallow over bedrock steps, or 3) overfalls, where fast flow occurs over a step with a substantial drop in elevation. I find twenty-two sites that are potential hydraulic barriers, providing information on where salmon may be expending more energy and informing future spawning management efforts.
Document
Extent
47 pages.
Identifier
etd22222
Copyright statement
Copyright is held by the author(s).
Permissions
This thesis may be printed or downloaded for non-commercial research and scholarly purposes.
Supervisor or Senior Supervisor
Thesis advisor: Venditti, Jeremy
Language
English
Member of collection
Download file Size
etd22222.pdf 4.93 MB

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