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Penman’s equation can also be used to compute evaporation from a water surface like a lake if _________

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in Irrigation Engineering by (75.2k points)
Penman’s equation can also be used to compute evaporation from a water surface like a lake if _________

(a) reflection coefficient = 0.05

(b) reflection coefficient > 0.05

(c) reflection coefficient < 0.05

(d) reflection coefficient = 0.45- 0.90

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I'd like to ask this question from Water Requirements of Crops in division Water Requirements of Crops of Irrigation Engineering

1 Answer

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by (106k points)
Right option is (a) reflection coefficient = 0.05

Explanation: The value of reflection factor or albedo varies for water surface, bare lands and snow. When the value is equal to 0.05, it can be used to compute evaporation from a water surface.

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