Question

Loss of canal discharge occurs mainly due to?

(a) Seepage and Percolation

(b) Percolation and Absorption

(c) Seepage and Evaporation

(d) Seepage and Absorption

The question was posed to me in an online quiz.

I'd like to ask this question from Canal Irrigation System topic in chapter Canal Irrigation System of Irrigation Engineering

Answer 1

Right option is (c) Seepage and Evaporation

To explain I would say: Seepage and Evaporation are the two main reasons for loss of canal discharge. Out of these, seepage loss is most significant in the initial stages (about 40%). Evaporation loss may range from 2 to 3% of the total canal discharge.