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The kind of canal section involved in irrigation work is __________

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The kind of canal section involved in irrigation work is __________

(a) canal high in embankment in partly in excavation

(b) canal partly in excavation and partly in embankment

(c) canal less in embankment

(d) canal half in excavation

I got this question in my homework.

Question is taken from Reports on Estimate for the Construction of Road and Irrigation Channel topic in portion Valuation, Reports Technical and Design Data of Civil Engineering Drawing

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Right answer is (b) canal partly in excavation and partly in embankment

Explanation: There are generally three kinds of canal sections involved in irrigation works and they are:-

• Canal fully in excavation

• Canal fully in embankment

• Canal partly in excavation and partly in embankment

Generally, the volume of earthwork for irrigational canals is calculated by the Trapezoidal formula which is also called End-area formula or the Mid-sectional formula. Generally, the side slope in cutting is kept as 1:1(H:V) and in banking 1.5:1(H:V) or 2:1(H:V) according to soil condition.

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