An existing unlined channel is having the following dimensions: Bottom width = 1.52 m; Side slopes...

An existing unlined channel is having the following dimensions:

Bottom width = 1.52 m; Side slopes = 1:1; Flow depth = 0.90meter; and

Bed-slope = 1/1667.

It is proposed to line this channel for the same discharging capacity. Find out the dimensions of the lined channel and work out the economics of the concrete lining, if following data are given:

Length of irrigation season = 150 days;

Saving in seepage loss by lining the canal = 1.5 per cent per km

Cost of water = Rs.150 /ha/m; Cost of concrete lining = Rs.16 /sq. m

Cost of reshaping and trimming canal = Rs. 4.00 per sq. m.

Life of lining = 40 years; Interest rate = 7 percent.

Annual maintenance and operational cost (rupees per km per year)

for unlined canals earth = Rs.1000; for concrete lined canals = Rs. 200

Other additional benefits = Rs. 350.00

Assume any other necessary data, if not given.

Expert Solution

where all notations have their usual meaning. Please give positive feedback. Thank you

Ally Wells answered 4 months ago

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