Experimental analisys of depending on temperature and solar radiation evapotranspiration empirical models at Republic of Ecuador.

Evapotranspiration is a phenomenon highly involved for water infiltration and redistribution among the soil. It is also an important factor that determines the amount of water available for crops. In this article, evaporation data collected by an evaporimeter tank in a greenhouse at Imbabura province (north of Ecuador) are presented. Based on these experimental results, the validity of five evapotranspiration reference models that depends exclusively on temperature and solar radiation has been tested for this area. It was seen that, there is a good correlation (Pearson-coefficient around 80%) between the observed data and the prediction of these five models, being the Irmak model (2003) what suits better with the observed data for this region. At the end of the article, a new empirical model that was inferred by these experimental data is presented, with the goal to improve the evaporation prediction in this area of South-America.