SLOPE EFFECT ON DISCHARGE EFFICIENCY IN RECTANGULAR BROAD CRESTED WEIR WITH SLOPED UPSTREAM FACE

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FARHOUDI J.; SHAH ALAMI H.

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Journal Paper

Paper Information

Journal: INTERNATIONAL JOURNAL OF CIVIL ENGINEERING Year:2005 | Volume:3 | Issue:1 Page(s): 0-0

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Information Journal Paper

Title

SLOPE EFFECT ON DISCHARGE EFFICIENCY IN RECTANGULAR BROAD CRESTED WEIR WITH SLOPED UPSTREAM FACE

Author(s)

FARHOUDI J. | SHAH ALAMI H.

Keywords

DISCHARGE EFFICIENCY

RECTANGULAR WEIR

UPSTREAM FACE SLOPE

CRITICAL DEPTH

Abstract

The rectangular broad crested weirs are widely used to measure the water discharge
which is one of the most popular tools in the irrigation canals particularly, in developing
countries.The present article is trying to demonstrate the results of an experimental work carried
out on rectangular broad crested weir with sloped upstream face to investigate the effect of
upstream slope on DISCHARGE EFFICIENCY. The upstream slope was varying from 90 to 23 degrees
while incoming discharge was ranging from 14 to 75 lit/ sec. The experiments were conducted in a
flume with a weir of fixed height under the normal downstream water depth .It is revealed that the
slope of upstream face in rectangular broad crested weir would smoothen the flow profile having
the CRITICAL DEPTH on the weir crest adjacent and upstream of downstream edge of the weir . The
results also lead to a novel achievement showing that the weir DISCHARGE EFFICIENCY is dependent
on the slope of upstream face of the weir. As the slope of upstream face of the rectangular broad
crested weir is decreasing from 90 to 23 the weir DISCHARGE EFFICIENCY is increasing and reaching
to its maximum through a parabola function at slope angle of 25 degrees(i.e. 1:2.15). The
investigation also showed that the depth of flow over the weir crest, the specific energy head of
the approaching flow relative to chanel bed and the CRITICAL DEPTH would be a pertinent similarity
scales to asses the flow behavior over different sloped rectangular broad crested weirs between
model and prototype. However, some broad investigation is recommended to endorse the
achievements.

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APA: Copy

FARHOUDI, J., & SHAH ALAMI, H.. (2005). SLOPE EFFECT ON DISCHARGE EFFICIENCY IN RECTANGULAR BROAD CRESTED WEIR WITH SLOPED UPSTREAM FACE. INTERNATIONAL JOURNAL OF CIVIL ENGINEERING, 3(1), 0-0. SID. https://sid.ir/paper/271711/en

Vancouver: Copy

FARHOUDI J., SHAH ALAMI H.. SLOPE EFFECT ON DISCHARGE EFFICIENCY IN RECTANGULAR BROAD CRESTED WEIR WITH SLOPED UPSTREAM FACE. INTERNATIONAL JOURNAL OF CIVIL ENGINEERING[Internet]. 2005;3(1):0-0. Available from: https://sid.ir/paper/271711/en

IEEE: Copy

J. FARHOUDI, and H. SHAH ALAMI, “SLOPE EFFECT ON DISCHARGE EFFICIENCY IN RECTANGULAR BROAD CRESTED WEIR WITH SLOPED UPSTREAM FACE,” INTERNATIONAL JOURNAL OF CIVIL ENGINEERING, vol. 3, no. 1, pp. 0–0, 2005, [Online]. Available: https://sid.ir/paper/271711/en

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