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Groundwater-surface water interactions in a constructed side channel complex

Resource type
Thesis type
(Project) M.Sc.
Date created
2023-04-14
Authors/Contributors
Abstract
Constructed groundwater-fed side channels are a common restoration tool used in the Pacific Northwest to mitigate loss of floodplain features important for salmon spawning and rearing. The former floodplain of the Mamquam River, in Squamish, British Columbia, has a series of groundwater-fed side channels that consistently lose surface flow during the dry season, stranding juvenile coho salmon (Oncorhynchus kisutch). This study characterizes temporal and spatial patterns of streamflow in a side channel relative to mainstem streamflow, shallow groundwater levels, and local water use through synoptic flow measurements, water quality tracers, and a relative elevation transect. The construction and subsequent removal of a beaver dam enables a natural experiment, establishing a hydraulic connection between the side channels and a nearby water rights holder. Results suggest that the side channels become a local surface water sink and are susceptible to water withdraw under certain conditions during the dry season.
Document
Extent
47 pages.
Identifier
etd22379
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: Chartrand, Shawn
Language
English
Member of collection
Download file Size
etd22379.pdf 2.37 MB

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