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What is the correct formula for Gross irrigation...

What is the correct formula for Gross irrigation requirement?

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asked Jul 29, 2023 in Irrigation Engineering by Carter (75.2k points)

What is the correct formula for Gross irrigation requirement?

(a) Cu – Re

(b) CIR + leaching losses

(c) NIR/Na

(d) FIR/Nc

I had been asked this question in homework.

My question comes from Water Requirements of Crops in portion Water Requirements of Crops of Irrigation Engineering

irrigation engineering
water requirements of crops

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answered Jul 31, 2023 by Greg (106k points)

The correct choice is (d) FIR/Nc

Explanation: It is defined as the amount of water required to meet the field irrigation requirements plus the amount of irrigation water lost in conveyance through the canal system by evaporation and seepage.

Mathematically, GIR = FIR/Nc.

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