Irrigation Engineering
The structure constructed to allow drainage water to flow under pressure through an inverted syphon below a canal, is called

Syphon aqueduct
Syphon
Super-aqueduct
Super passage

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Irrigation Engineering
Bligh's theory of seepage assumes

Loss of head follows the sine curve
More weightage to horizontal creep than vertical creep
Equal weightage to the horizontal and vertical creep
Less weightage to horizontal creep than vertical creep

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Irrigation Engineering
The intensity of irrigation means

Percentage of culturable commanded area to be irrigated annually
Total depth of water supplied by the number of waterings
Percentage of the mean of culturable commanded area and the gross commanded area to be irrigated annually
Percentage of gross commanded area to be irrigated annually

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