Document Type

Thesis

Date of Degree

Spring 2011

Degree Name

MS (Master of Science)

Degree In

Civil and Environmental Engineering

First Advisor

Larry J. Weber

Second Advisor

Justin W. Garvin

Abstract

The Seattle District wants to better manage the Ballard Locks and structures along the Lake Washington Ship Canal (LWSC) in a way that will maintain the environmental sustainability and biodiversity in the area. Due to strict salt water intrusion regulations in the LWSC, the Seattle District is working on upgrading their management practices such that they will resolve two inter-related problems. First, to improve the fish passage conditions for migrating salmon; and second, to learn how to better manage the salt wedge that forms and intrudes upstream. Based on the hydrodynamic and water quality results that are produced by this research, the Engineer Research and Development Center (ERDC) Portland Office will use their Eulerian-Lagrangian-Agent-Model (ELAM) to analyze fish patterns, looking for the most beneficial management schemes that assist salmon in migrating upstream.

This research implemented CFD engineering techniques to help better understand the effectiveness of the hydraulic structures in the area, as well as come up with management practices that both mitigate the salt water intrusion from Puget Sound, and improve the migrating passages for salmon.

Keywords

COMPUTATIONAL FLUID DYNAMICS, DENSITY-CURRENT FLOWS, FISH PASSAGE, LOCK-EXCHANGE FLOWS, MIGRATORY FISH, NAVIER-STOKES EQUATIONS

Pages

xiii, 106 pages

Bibliography

Includes bibliographical references (pages 91-93).

Copyright

Copyright 2011 Adam Nielsen

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