For discharge over ogee weir discharge is directly proportional to length but for discharge over narrow crested weir it is inversely proportional to length.

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In discharge of water over narrow crested weir, discharge is directly proportional to the cube root of acceleration due to gravity.

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In discharge of water over narrow crested weir, head of water is directly proportional to Discharge Coefficient.

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In discharge of water over Ogee weir, discharge is directly proportional to the first power of length.

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An Ogee weir 3.4 m long had a head of 40 cm of water. If CD = 0.63 find the discharge over the weir.

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An Ogee weir 5 m long had a head of 40 cm of water. If CD = 0.61, find the discharge over the weir.

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The height of water on upstream and downstream side of a submerged weir of 4 m length are 24 cm and 13 cm. If Cd for free and drowned portions are .62 and .78 respectively, find the discharge over the weir.

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The height of water on upstream and downstream side of a submerged weir of 4 m length are 23.5 cm and 14 cm. If Cd for free and drowned portions are .61 and .75 respectively, find the discharge over the weir.

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In Bazin’s formula, the discharge is inversely proportional to the length of weir.

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The head of water over a rectangular weir is 28 cm. The length of the crest of the weir end contraction suppressed is 1.27 m. Find the discharge using the Francis formula.

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Find the discharge over a cipolletti weir of length 1.3 m when the head over the weir is 0.65 m. Take Cd = 0.60.

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The head of water over a rectangular weir is 38 cm. The length of the crest of the weir end contraction suppressed is 1.3 m. Find the discharge using the Francis formula.

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Find the discharge over a cipolletti weir of length 1.5 m when the head over the weir is 0.85 m. Take Cd = 0.61.

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The head of water over a rectangular weir is 26 cm. The length of the crest of the weir end contraction suppressed is 1.25 m. Find the discharge using the Francis formula.

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Find the discharge of water flowing over a rectangular notch of 1.5 m length when the constant head over the notch is 275 mm. Take Cd = .60

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Find the discharge of water flowing over a rectangular notch of 1.3 m length when the constant head over the notch is 255 mm. Take Cd = .62

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The head of water over a rectangular notch is 700 mm. The discharge is 200 litres/s. Find the length of the notch, when CD =.63

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The head of water over a rectangular notch is 900 mm. The discharge is 300 litres/s. Find the length of the notch, when CD =.62

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A notch is a device used to measure the turbulence of the flowing liquid directly.

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What is main reading required in calculation for rectangular notch or weir.

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The time taken to empty the tank is independent of Cd but depends only on the height and acceleration due to gravity.

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In Francis empirical expression for discharge, the relation between head of water and discharge is

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