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Which formula is extensively used for estimating seasonal water requirements?

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+1 vote
in Irrigation Engineering by (75.2k points)
Which formula is extensively used for estimating seasonal water requirements?

(a) Blaney-Criddle formula

(b) Hargreaves pan evaporation method

(c) Penman’s equation

(d) Christiansen formula

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Enquiry is from Water Requirements of Crops topic in division Water Requirements of Crops of Irrigation Engineering

1 Answer

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by (106k points)
Right choice is (a) Blaney-Criddle formula

To explain: This formula is also used for estimating monthly consumptive use.

Blaney-Criddle formula is written as Cu = k.f  where, f = p/40[1.8t + 32].

Where Cu = monthly/seasonal consumptive use, k = crop factor, p = monthly % of annual daylight hours in that period, and t = mean monthly temperature

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