Comparison of the performances of six empirical mass transfer-based reference evapotranspiration estimation models in semi-arid conditions.

Background: Accurately measured or estimated reference evapotranspiration (ET) data are needed to properly manage water resources and prioritise their future uses. ET can be most accurately measured using lysimeter systems. However, high installation and operating costs, as well as difficult and time-consuming measurement processes limit the use of these systems.

Estimation of reference evapotranspiration using some class-A pan evaporimeter pan coefficient estimation models in Mediterranean-Southeastern Anatolian transitional zone conditions of Turkey.

Background: Reference evapotranspiration (ET), which is used as the basic data in many studies within the scope of hydrology, meteorology, irrigation and soil sciences, can be estimated by using the evaporation (E) measured from the class-A pan evaporimeter. However, this method requires reliable pan coefficients (K). Many empirical models are used to estimate K coefficients.