What is the design frequency discharge for road bridges and culverts?

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Culverts are all those road bridges whose spans are up to ________

asked Aug 19, 2023 in Irrigation Engineering by Carter (75.2k points)

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A road bridge is proposed to be constructed across an alluvial stream with the estimated design discharge as 2500 m^3/s. It is decided to adopt a total effective waterway equal to 300 m for this bridge as against the regime width of 237.5 m due to afflux considerations. If the HFL at the site is at RL 214 m, then the RL of the open foundation can be suggested as _______

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asked Aug 22, 2023 in Irrigation Engineering by Carter (75.2k points)

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The relation between the scour depth (R) and Regime scour depth (Re) for an alluvial river having regime width (W) and contracted width (B) is given by ______

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For purely rigid streams, the foundation of the bridge substructure is taken above the bed.

asked Sep 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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The average grain size of the bed material is 0.16 mm for medium silt, Lacey’s silt factor is likely to be _______

asked Aug 25, 2023 in Irrigation Engineering by Carter (75.2k points)

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asked Sep 17, 2023 in Irrigation Engineering by Carter (75.2k points)

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The existing width of the stream is contracted at the bridge site by _________

asked Sep 5, 2023 in Irrigation Engineering by Carter (75.2k points)

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The Lacey’s scour depth R given by equation R = 0.473 (Q/f)^1/3 is applicable when the river width is equal to ___________

asked Sep 5, 2023 in Irrigation Engineering by Carter (75.2k points)

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asked Sep 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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While going to the Tirupati Tirumala Devasthanam from Madras, highway road is found to be lowered at several places over which natural drainage flow during the rainy season. Such dips in the roads are called ___________________

asked Aug 19, 2023 in Irrigation Engineering by Carter (75.2k points)

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asked Sep 25, 2023 in Irrigation Engineering by Carter (75.2k points)

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asked Sep 17, 2023 in Irrigation Engineering by Carter (75.2k points)

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A bridge culvert is to be constructed across a proposed lined canal. The afflux at this site for a contracted canal width can be computed by __________

asked Sep 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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Greater is the afflux, lesser will be the available clearance for the same deck level.

asked Sep 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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The greater is the heading up of water at the inlet end, the greater will be the flow velocity in case of culvert across some flat terrain.

asked Sep 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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asked Sep 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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asked Sep 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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asked Sep 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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Design a regime channel for a discharge of 90 cumecs and silt factor is 1.3 use Lacey’s Theory.

asked Aug 25, 2023 in Irrigation Engineering by Carter (75.2k points)

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asked Aug 15, 2023 in Irrigation Engineering by Carter (75.2k points)

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The CCA of a water course is 1500 hectares. The intensity of sugarcane and wheat crops is 20% and 40% respectively. The duties for the crops at the head of the watercourse are 730 hectares/cumec and 1600 hectares/cumec respectively. Calculate the design discharge at the outlet assuming a time factor equal to 0.8.

asked Jul 31, 2023 in Irrigation Engineering by Carter (75.2k points)

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Design a lined canal to carry a discharge of 400 cumecs and slope is 1 in 6000. Take side slopes as 1 : 1 and rugosity constant as 0.012. Assume limiting velocity as 3 m/sec.

asked Aug 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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