Irrigation Engineering
Lane's weighted creep theory assumes

Triple weightage to vertical creep and one weightage to horizontal creep
Double weightage to horizontal creep and one weightage to vertical creep
Triple weightage to horizontal creep and one weightage to vertical creep
Equal weightage to horizontal and vertical creeps

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Irrigation Engineering
For a standing crop, the consumptive use of water is equal to the depth of water

Evaporated by the crop
Used by the crop in transpiration, evaporation and also the quantity of water evaporated from adjacent soil
Transpired by the crop
Transpired and evaporated by the crop

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Irrigation Engineering
In a syphon aqueduct

Canal passes over the drainage and H.F.L. of the drainage is below the bottom of the canal trough
Canal passes over the drainage and H.F.L. of the drainage is above the bottom of the canal trough
Drainage passes over the canal and F.S.L. of the canal is below the bottom of the drainage trough
Drainage passes over the canal and F.S.L. of the canal is above the bottom of the drainage trough

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