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Analysis of a skewed slot orifice Item Info

The object of this study was to develop design criteria for a skewed slot orifice fishway exit. Using these criteria the fishway exist can be constructed in culvert wingwalls. The outlet would terminate in a skew angle and be designed to create flow conditions necessary for fish passage. Values of slot orifice contraction rations varied from .65 to .82 of culvert width; culvert slope varied from .015 to .045; skew angles measured varied from thirty degrees to seventy-five degrees; three lateral positions of the fishway channel were tested. Dimensional analysis was used to determine the significant design parameters. Design curves displaying the relationship between the backwater ration h/h and the foude number are presented. The design curves and an equation based on the momentum principle are used to design two types of skewed orifice exists. One problem uses the same contraction ratio for the skewed exit and normal slot orifices placed downstream; the other uses different values of contraction ratio for the skewed exit and normal slot orifices downstream. Necessary criteria regarding suitability of flow for fish passage are also discussed

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Title:
Analysis of a skewed slot orifice
Authors:
Harrison, Michael B.
Date Created (ISO Standard):
1972-07
Description:
The object of this study was to develop design criteria for a skewed slot orifice fishway exit. Using these criteria the fishway exist can be constructed in culvert wingwalls. The outlet would terminate in a skew angle and be designed to create flow conditions necessary for fish passage. Values of slot orifice contraction rations varied from .65 to .82 of culvert width; culvert slope varied from .015 to .045; skew angles measured varied from thirty degrees to seventy-five degrees; three lateral positions of the fishway channel were tested. Dimensional analysis was used to determine the significant design parameters. Design curves displaying the relationship between the backwater ration h/h and the foude number are presented. The design curves and an equation based on the momentum principle are used to design two types of skewed orifice exists. One problem uses the same contraction ratio for the skewed exit and normal slot orifices placed downstream; the other uses different values of contraction ratio for the skewed exit and normal slot orifices downstream. Necessary criteria regarding suitability of flow for fish passage are also discussed
Subjects:
fish fish migration
IWRRI number:
197208
Rights:
In copyright, educational use permitted. Educational use includes non-commercial reproduction of text and images in materials for teaching and research purposes. For other contexts beyond fair use, including digital reproduction, please contact the University of Idaho Library Special Collections and Archives Department at libspec@uidaho.edu. The University of Idaho Library is not liable for any violations of the law by users.
Publisher:
University of Idaho
Contributing Institution:
University of Idaho
Type:
Text
Format:
application/pdf
Cataloger:
wbv
Date Digitized:
2012

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Preferred Citation:
"Analysis of a skewed slot orifice", Idaho Waters Digital Library, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iwdl/items/iwdl-197208.html
Rights
Rights:
In copyright, educational use permitted. Educational use includes non-commercial reproduction of text and images in materials for teaching and research purposes. For other contexts beyond fair use, including digital reproduction, please contact the University of Idaho Library Special Collections and Archives Department at libspec@uidaho.edu. The University of Idaho Library is not liable for any violations of the law by users.
Standardized Rights:
http://rightsstatements.org/vocab/InC-EDU/1.0/
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