Question

Which of the following statement is wrong?

(a) A lined canal is not susceptible to erosion

(b) The provision of adequate lining reduces the danger of breaches of channel

(c) The lining does not reduce the money spent in removing weeds

(d) Lining eliminates flood dangers

The question was asked in class test.

Enquiry is from Advantages of Lining in division Lining of Irrigation Canals and its Economics of Irrigation Engineering

Answer 1

Right option is (c) The lining does not reduce the money spent in removing weeds

Best explanation: The plants flow down the canal due to higher flow velocities in lined-canals due to which expenditure is reduced considerably. A strong concrete lining eliminates the dangers from flood and minor repairs like plugging of cracks, cuts and uneven settlements of banks (which results in breaches of the channel).