Detailed Description of Calculation of Potential Evapotranspiration Using the Penman Equation

Abstract

Penman equation is the calculation process by which potential evapotranspiration is estimated using air temperature, humidity, wind velocity and duration of sunshine. These elements are observed at meteorological stations.
In this paper, we have described the calculation process of the Penman equation in detail by using the observed data and actual values as much as possible as a guide when calculating the potential evapotranspiration using the Penman equation.
Also, we have shown a program of the Penman equation written in BASIC, which agrees fairly well with the calculated example.