Although deflectors are commonly used in fish habitat rehabilitation projects to create and/or maintain pools, there is a lack of understanding of the complex flow field and scour patterns around these structures. The objective of this research is to quantify the 3D flow dynamics and the bed morphology around various designs of flow deflectors in a laboratory flume over a plain and mobile bed. 3D velocity measurements were taken with an acoustic Doppler velocimeter. After comparing different methods of bed shear stress estimates, it was determined that the turbulent kinetic energy approach was best at capturing the shear stress amplification near the deflectors. Deflectors oriented perpendicular to the flow create the most important disturbance of the flow field, the greatest increase in turbulence intensity and the largest scour hole, followed by upstreamoriented deflectors (135°) and downstream-oriented ones (45°). 90° deflectors would therefore potentially provide the greatest benefit for fish habitat rehabilitation.

No description available.

Thesis (M.Sc.). / Written for the Dept. of Geography. Title from title page of PDF (viewed 2008/08/04). Includes bibliographical references.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1991. / Vita. Abstract. Includes bibliographical references (leaves 128-130). Also available via the Internet.

This thesis describes the design of a proposed, new hydraulic laboratory, wave generator for use in a 39'-4¼'' long, 30" wide and 36" deep flume, and the re-design of a small wave generator previously built for a 21'-3 5/8" long, 8 3/4" wide and 10 5/8" deep flume. These relatively short flumes are installed in the Hydraulics Laboratory of the Department of Civil Engineering, University of British Columbia, and the installation of the proposed, new wave generator would augment the present limited wave research facilities. The project is supported by an operating grant from the National Research Council of Canada. The preparatory study of laboratory wave generators in use, presented herein, was made to determine how they function and their design problems. It was concluded that a rigid paddle, double articulation type would be best for generating deep-water, transition and shallow-water waves in a flume of relatively short length. Biesel's wave generator theory is outlined and was used in estimating wave heights and in determining power and strength requirements. The existing wave generator for the "small" flume is a rigid paddle, double articulation type. It did not function satisfactorily due to a very irregular paddle motion. The causes were isolated and a new drive system designed and installed, with good results. The resulting new operating specifications are: power = 1. Hp (D.C.) wave period range = 0.34 to 2.1 sees. design water depth = 6.5" estimated maximum wave height = 4" The proposed, new wave generator for the "large" flume is a rigid paddle, double articulation type designed around the adjustable paddle concept of G.D. Ransford (1949) as modified by Lt. CB. Coyer (1953). The designed operating characteristics are: power = 10-Hp (D.C.) wave period range = 0.68 to 4.28 secs. design water depth = 25" estimated maximum wave height = 14" / Applied Science, Faculty of / Civil Engineering, Department of / Graduate

No description available.

Thesis (M.S. - Soils, Water and Engineering)--University of Arizona, 1985. / Bibliography: leaves 119-121.

Thesis (M.S.)--University of Wyoming, 2007. / Title from PDF title page (viewed on June 17, 2008). Includes bibliographical references.

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No description available.