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When the TWC lies below the JHC at all discharges, the problem can be solved by which of the following provisions? i. Constructing a sloping apron above the river bed ii. Provision of roller bucket type of energy dissipator iii. Provision of a ski-jump bucket iv. A sloping apron below the river bed v. Construction of a subsidiary dam vi. A sloping apron partly above and partly below the river bed

When the TWC lies below the JHC at all discharges, the problem can be solved by which of the following provisions? i. Constructing a sloping apron above the river bed ii. Provision of roller bucket type of energy dissipator iii. Provision of a ski-jump bucket iv. A sloping apron below the river bed v. Construction of a subsidiary dam vi. A sloping apron partly above and partly below the river bed Correct Answer iii, iv and v

When TWC lies below the JHC at all discharges, the expected solution is – i. Provision of a ski-jump bucket ii. A sloping apron below the river bed of length 5 (y2 – y1) iii. Construction of a subsidiary dam below the main dam.

Related Questions

Which of the following statements are true with regard to energy dissipation below a dam? (i) If the upper conjugate depth of a hydraulic jump is below the tailwater, little energy will be dissipated (ii) An upturned bucket will protect the dam from scour by moving material toward the dam. (iii) A secondary dam may increase tailwater height, thereby causing a hydraulic jump to form at the toe of the main dam. (v) A slopping apron above streambed level may be used to control the hydraulic jump so that it occurs on the apron. 
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