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Bed width = 5.5m
Top width of banks = 1.5m
At the proposed site a fall of 1.5m is available. Good foundation is available 1m
below natural surface level. The canal section and flow conditions are same
below the fall. Assume any other data if required.
Prepare the following drawings (not to scale)
i. Half plan at top and half at the foundation level.
11. Section across the channel through the notch fall.
Design a suitable cross drainage work for the following hydraulic particulars:
Canal
Full supply discharge = 25 cumecs
Bed level = 112.00
Full supply level = 113.50
Bed width = 18.0m
Side slope =1.5 H:1 ५
Left bank is 3.0m wide. Right bank is 4.5m wide and the cross drainage work
carries a roadway of 4.5m over it.
Drainage
Catchment area = 175 sq.km
Ryve’s coefficient =10
Bed level = 106.80
High flood depth = 3.2m
General ground level = 113.20

Prepare the following drawings (not to scale)

1. Half sectional plan at the foundation level.

ii. | Section along the centre line of the canal.

PART C
Answer any two full questions, each carries 10 marks.

What are the design criteria for an earth dam?
Distinguish between a gallery and a shaft in a dam.
Explain the components provided in a stilling basin for energy dissipation.

Derive an expression for the thickness of an arch dam using thin cylinder theory

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