A Mathematical Model for Estimation of Potential Evapotranspiration

摘要

Evapotranspiration in planning irrigation projects is very important. Therefore, measurement and estimation of evapotranspiration are essential. There are presented different formula for evapotranspieration estimation. Many of these methods satisfy in the especial climatic conditions. Application of these formula for other region accompanying with errors. In this paper, a mathematical model describing the relationship between effective evapotranspiration and actual evapotranspiration is derivead using meteorological data and volumetric lysimeter data of Hashemabad, Gorgan station.