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Comparison of sharp-crested weirs for discharge measurement in open-channel flow, Victor M. Ponce, San Diego State University

photo of weirs

Comparison of sharp-crested weirs
for discharge measurement
in open-channel flow

Victor M. Ponce
08 November 2013

Description
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Schematic
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Dimensions *

Ratios

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H/B

P/H

b/H

L/H

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]

[10]

[11]

V-notch
weir:
Fully
contracted

< 1.25

> 3.0

> 1.5

≤ 0.2

≥ 2.0

V-notch
weir:
Partially
contracted

< 2.0

> 2.0

> 0.33

≤ 0.4

Cipolletti
weir

≥ 0.2

≥ 2.0

Rectangular
weir

≥ 0.2

≥ 0.33

≥ 0.5

> 0.4167

Standard
contracted
rectangular
weir

≥ 2.0

≥ 3.0

Standard
suppressed
rectangular
weir

≥ 0.2

≥ 4.0

≥ 3.0

* Length dimensions in Cols. 3 to 6 in ft.

131108