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Effects of hydraulic structures on fish passage: an evaluation of 2D vs 3D hydraulic analysis methods

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dc.contributor.authorRyan, Erin R., author
dc.contributor.authorBledsoe, Brian P., advisor
dc.contributor.authorMyrick, Christopher A., committee member
dc.contributor.authorNelson, Peter A., committee member
dc.date.accessioned2015-08-28T14:35:38Z
dc.date.available2015-08-28T14:35:38Z
dc.date.issued2015
dc.description.abstractChannel-spanning hydraulic structures can act as barriers to upstream fish movement. Negative consequences associated with this disruption of longitudinal habitat connectivity highlight the need for accurate and practicable assessment techniques. Three-dimensional evaluation methods have been shown to resolve the complex flow at in-stream structures and accurately predict fish movement; yet three-dimensional modeling can be impractical due to time and resource requirements. This study investigates using a two-dimensional computational fluid dynamics model and statistical analyses to describe the hydraulic conditions at a whitewater park structure in Lyons, Colorado. Fish movement observations are paired with the resulting hydraulic variables along spatially explicit, continuous paths which represent potential swimming routes. Logistic regression analyses indicate that flow depth and velocity are strongly associated with fish passage; a combined depth and velocity variable accurately predicts 92% of rainbow trout (Oncorhynchus mykiss) and brown trout (Salmo trutta) movement observations at this hydraulic structure. The results of this study suggest that two-dimensional analysis methods can provide a cost-effective approach to assessing the effects of similar hydraulic structures on fish passage when three-dimensional analysis in not feasible. Further, conclusions from this study can be used to guide management and design decisions for both trout and fishes with comparatively lower swimming performance.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.identifierRyan_colostate_0053N_13193.pdf
dc.identifier.urihttp://hdl.handle.net/10217/167214
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartof2000-2019
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subjectfish passage
dc.subjecthydraulic structure
dc.subjectbarrier
dc.subjectwhitewater park
dc.subjecthydraulic modeling
dc.titleEffects of hydraulic structures on fish passage: an evaluation of 2D vs 3D hydraulic analysis methods
dc.typeText
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplineCivil and Environmental Engineering
thesis.degree.grantorColorado State University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science (M.S.)

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