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ARPN Journal of Engineering and Applied Sciences - page 3 / 9

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VOL. 3, NO. 2, APRIL 2008

ISSN 1819-6608

ARPN Journal of Engineering and Applied Sciences

©2006-2008 Asian Research Publishing Network (ARPN). All rights reserved.

www.arpnjournals.com

Figure-2. The plan view of hydraulic laboratory and main flume.

For each test, the upstream step-referenced head on the flume was measured using a point gage (estimated measurement uncertainty ± 0.1 mm), and the discharge through the flume was determined using the triangular weir (53 degree). The tail water levels relative to the step

rates. Table-1 summarizes the dimensions of the tested flumes. The tested flumes shared several characteristics. All utilized rectangular-shaped approach, throat, and tail water sections. The throat width (w) and the length of the throat section (L) were held constant at 25 cm and 30.48

elevation were al

2.2. Test flumes

so recorded.

cm respectively for all flumes. The principal differences between the different tested flumes were the step height, upstream and downstream slope. The upstream slope was

For carry out of experiments 11 kind of flumes were used. Long-throated flumes were constructed in the test section (Figure-2) and operated at a range of flow

1:1, 2:1 and 3:1. The downstream slope was 6:1, 10:1 and vertical. Also the step height was 7.62 cm and 15.24 cm.

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