Question

Penman’s equation for the estimation of PET has been derived by using ___________

(a) energy balance approach

(b) mass transfer approach

(c) combination of energy balance approach and mass transfer approach

(d) combination of energy balance approach and energy transfer approach

I got this question in an international level competition.

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

Answer 1

Correct choice is (c) combination of energy balance approach and mass transfer approach

Easiest explanation: The formula was developed by Penman in 1948 for determining the consumptive use of different areas of the basin. This formula has sound theoretical reasoning and is derived by combining energy balance and mass transfer approaches for the computation of transpiration and evaporation respectively.